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349
Matlab code/Grimace.m
Executable file
349
Matlab code/Grimace.m
Executable file
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%Grimace
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%all alfas in DEGREES!
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%by ascorrea, with help from Jacob Huffman
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%"filler" variable just makes it easier to switch between Ronald and Grimace
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function Grimace(filler, pranformfile, pranformConstraint)
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%LOCATIONS--------------------------------------------------------------]
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rootLOCATION='\\ad.uiuc.edu\ae\correa2\Desktop\AE441\AE441 - Home Edition\Matlab code\';
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airfoilLOCATION='\\ad.uiuc.edu\ae\correa2\Desktop\AE441\AE441 - Home Edition\Airfoils';
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pranformLOCATION='\\ad.uiuc.edu\ae\correa2\Desktop\AE441\AE441 - Home Edition\Planforms';
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pranformConstraintLOCATION='\\ad.uiuc.edu\engr\ews\homes\desktop\AE441\AE441 - Home Edition\Planform Constraints';
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paramLOCATION='\\ad.uiuc.edu\engr\ews\homes\desktop\AE441\AE441 - Home Edition\Parameter Files';
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%-----------------------------------------------------------------------]
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n=50;
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h1=13.33;
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h2=10.5;
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cd(pranformLOCATION)
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[spans, chords, offsets, airfoil]=textread(pranformfile, '%f %f %f %s');
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cd(pranformConstraintLOCATION)
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[spansCONST, chordsCONST, offsetsCONST, heightCONST]=textread(pranformConstraint, '%f %f %f %f');
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cd(rootLOCATION)
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cd(airfoilLOCATION)
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[planformLE planformTE]=plotpranform(spans, chords, offsets, n);
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[constraintLE constraintTE]=plotconstraint(spansCONST, chordsCONST, offsetsCONST, n);
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plotheight=plotThick(spans, chords, offsets, airfoil, h1, n);
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plotheight2=plotThick(spans, chords, offsets, airfoil, h2, n);
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planformLE=[flipud(planformLE); -planformLE(:,1) planformLE(:,2)];
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planformTE=[flipud(planformTE); -planformTE(:,1) planformTE(:,2)];
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constraintLE=[flipud(constraintLE); -constraintLE(:,1) constraintLE(:,2)];
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constraintTE=[flipud(constraintTE); -constraintTE(:,1) constraintTE(:,2)];
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plotheight=[flipud(plotheight); -plotheight(:,1) plotheight(:,2)];
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plotheight2=[flipud(plotheight2); -plotheight2(:,1) plotheight2(:,2)];
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clf
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hold on
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plot(planformLE (:,1), planformLE(:,2),'k','LineWidth',2)
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plot(planformTE (:,1), planformTE(:,2),'k','LineWidth',2)
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plot(constraintLE (:,1), constraintLE(:,2),'LineWidth',1.5)
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plot(constraintTE (:,1), constraintTE(:,2),'LineWidth',1.5)
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plot(plotheight(:,1),plotheight(:,2),'r','LineWidth',1)
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plot(plotheight2(:,1),plotheight2(:,2),'r--','LineWidth',1)
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axis equal
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axis off
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hold off
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cd(pranformLOCATION)
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filename=regexprep(pranformfile, '.plan', 'grim.tiff');
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print ('-dtiff', filename)
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cd(rootLOCATION)
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function [plotLE plotTE]=plotpranform(spans, chords, offsets, n)
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Chords = findChords(n, chords, spans);
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%plot planform
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for i = 1:(size(chords)-1)
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dist=0;
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for j = 1:n
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dist = (spans(i+1)-spans(i))./n;
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if i==1
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xplotLE(i,j+1)=spans(1)+dist*(j);
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else
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xplotLE(i,1)=xplotLE(i-1,end);
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xplotLE(i,j+1)=xplotLE(i-1,end)+dist*(j);
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end
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fitX(1)=spans(i);
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fitX(2)=spans(i+1);
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fitY(1)=offsets(i);
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fitY(2)=offsets(i+1);
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a = polyfit(fitX, fitY,1);
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yplotLE(i,j) = a(1)*xplotLE(i,j)+a(2);
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end
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end
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plotLE=zeros(1,2);
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plotTE=zeros(1,2);
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for i=1:(size(chords)-1)
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for j=1:n
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plotLE=[plotLE; xplotLE(i,j) -yplotLE(i,j)];
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plotTE=[plotTE; xplotLE(i,j) -(yplotLE(i,j)+Chords(i,j))];
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end
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end
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plotTE(1,:)=[];
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plotLE(1,:)=[];
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end
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function [plotLE plotTE]=plotconstraint(spans, chords, offsets, n)
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%plot constraint
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for i = 1:(size(chords)-1)
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for j = 1:n
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dist = (spans(i+1)-spans(i))./n;
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if i==1
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xplotLE(i,j+1)=spans(1)+dist*(j);
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else
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xplotLE(i,1)=xplotLE(i-1,end);
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xplotLE(i,j+1)=xplotLE(i-1,end)+dist*(j);
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end
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yplotLE(i,j) = offsets(i+1);
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end
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end
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plotLE=zeros(1,2);
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plotTE=zeros(1,2);
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for i=1:(size(chords)-1)
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for j=1:n
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plotLE=[plotLE; xplotLE(i,j) -yplotLE(i,j)];
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plotTE=[plotTE; xplotLE(i,j) (-yplotLE(i,j)-chords(i+1))];
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end
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end
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plotTE(1,:)=[];
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plotLE(1,:)=[];
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end
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function plotThick=plotThick(spans, chords, offsets, airfoil, h, n)
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n=n/10;
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Chords = findChords(n, chords, spans);
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plotThickLE=zeros(1,2);
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plotThickTE=zeros(1,2);
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for i = 1:(size(chords)-1)
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for j = 1:n
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Chords(i,j);
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dist = (spans(i+1)-spans(i))./n;
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if i==1
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xplotLE(i,j+1)=spans(1)+dist*(j);
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else
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xplotLE(i,1)=xplotLE(i-1,end);
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xplotLE(i,j+1)=xplotLE(i-1,end)+dist*(j);
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end
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fitX(1)=spans(i);
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fitX(2)=spans(i+1);
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fitY(1)=offsets(i);
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fitY(2)=offsets(i+1);
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a = polyfit(fitX, fitY,1);
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yplotLE(i,j) = a(1)*xplotLE(i,j)+a(2);
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chordloc=linspace(0, Chords(i,j));
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for k=1:length(chordloc)-1
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thicknessLE(k)=findthickness(airfoil{i}, Chords(i,j), chordloc(k));
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clc
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fprintf('%g:%u:%u:%u/%g:%u:%u:%u',h,i,j,k,h,(length(chords)-1),n,(length(chordloc)-1))
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if thicknessLE(k)>=h
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plotThickLE=[plotThickLE; xplotLE(i,j) -(chordloc(k)+yplotLE(i,j))];
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break
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end
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end
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for k=1:length(chordloc)-1
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thicknessTE(k)=findthickness(airfoil{i}, Chords(i,j), chordloc(length(chordloc)-k));
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if thicknessTE(k)>=h
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plotThickTE=[plotThickTE; xplotLE(i,j) -(chordloc(length(chordloc)-k)+yplotLE(i,j))];
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break
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end
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end
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end
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end
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plotLE=zeros(1,2);
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plotTE=zeros(1,2);
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for i=1:(size(chords)-1)
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for j=1:n
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plotLE=[plotLE; xplotLE(i,j) -yplotLE(i,j)];
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plotTE=[plotTE; xplotLE(i,j) -(yplotLE(i,j)+Chords(i,j))];
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end
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end
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plotTE(1,:)=[];
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plotLE(1,:)=[];
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plotThickLE(1,:)=[];
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plotThickTE(1,:)=[];
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plotThick=[plotThickLE; flipud(plotThickTE)];
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end
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function thickness=findthickness(airfoil, Chord, xLoc)
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Airfoil = load(airfoil);
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Airfoil = Airfoil*Chord;
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% blah....goodnight
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AirfoilX=Airfoil(:,1);
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[min_diff, k]=min(abs(AirfoilX));
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for j=1:k
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AirfoilYupper(j)=Airfoil(j,2);
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AirfoilXupper(j)=Airfoil(j,1);
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end
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for j=1:length(Airfoil)-k
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AirfoilYlower(j)=Airfoil(length(Airfoil)-(j-1), 2);
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AirfoilXlower(j)=Airfoil(length(Airfoil)-(j-1), 1);
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end
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AirfoilYupper=fliplr(AirfoilYupper);
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AirfoilXupper=fliplr(AirfoilXupper);
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AirfoilYlower=fliplr(AirfoilYlower);
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AirfoilXlower=fliplr(AirfoilXlower);
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AirfoilYlower=[0 AirfoilYlower];
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AirfoilXlower=[0 AirfoilXlower];
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[min_diff, k]=min(abs(AirfoilX));
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[min_diff, kU]=min(abs(AirfoilXupper-xLoc));
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[min_diff, kL]=min(abs(AirfoilXlower-xLoc));
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if xLoc<AirfoilXupper(kU)
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xFitU(1)=AirfoilXupper(kU-1);
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xFitU(2)=AirfoilXupper(kU);
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yFitU(1)=AirfoilYupper(kU-1);
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yFitU(2)=AirfoilYupper(kU);
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else
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xFitU(1)=AirfoilXupper(kU);
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xFitU(2)=AirfoilXupper(kU+1);
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yFitU(1)=AirfoilYupper(kU);
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yFitU(2)=AirfoilYupper(kU+1);
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end
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if xLoc<AirfoilXlower(kL)
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xFitL(1)=AirfoilXlower(kL-1);
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xFitL(2)=AirfoilXlower(kL);
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yFitL(1)=AirfoilYlower(kL-1);
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yFitL(2)=AirfoilYlower(kL);
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else
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xFitL(1)=AirfoilXlower(kL);
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xFitL(2)=AirfoilXlower(kL+1);
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yFitL(1)=AirfoilYlower(kL);
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yFitL(2)=AirfoilYlower(kL+1);
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end
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aU = polyfit(xFitU, yFitU,1);
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aL = polyfit(xFitL, yFitL,1);
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% yplotLE(i,j) = a(1)*xplotLE(i,j)+a(2);
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% thickness = AirfoilYupper(xLoc_indu)-AirfoilYlower(xLoc_indl);
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thickness = (aU(1)*xLoc+aU(2))-(aL(1)*xLoc+aL(2));
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end
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function Chords = findChords( n, Chord, X )
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for( i = 1:(length(Chord)-1) )
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Xtemp = linspace(X(i),X(i+1),n);
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Chords(i,:) = (Chord(i+1)-Chord(i))./(X(i+1)-X(i)).*(Xtemp-X(i))+Chord(i);
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end
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end
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function [wakeplot]=findwake(airfoil, chords, spans, offsets, n, alt, v_mach, laminarflow, width)
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n=n/10;
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[q v_fps dynvisc]=findconstants(alt, v_mach);
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Chords = findChords(n, chords, spans);
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thicknessplot=zeros(100,1);
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wakeplotX=zeros(100,1);
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wakeplotY=zeros(100,1);
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width=width/2;
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% for i = 1:(size(chords)-1)
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for i=1:1:(size(chords)-1)
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for j = 1:n
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% wakecoord(j,:)=linspace(0, Chords(i,j), n);
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dist = (spans(i+1)-spans(i))./n;
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y(j)=spans(i)+j*dist;
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if i==1
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xplotLE(i,j+1)=spans(1)+dist*(j);
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else
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xplotLE(i,1)=xplotLE(i-1,end);
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xplotLE(i,j+1)=xplotLE(i-1,end)+dist*(j);
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end
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fitX(1)=spans(i);
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fitX(2)=spans(i+1);
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fitY(1)=offsets(i);
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fitY(2)=offsets(i+1);
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a = polyfit(fitX, fitY,1);
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yplotLE(i,j) = a(1)*xplotLE(i,j)+a(2);
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x=linspace(0, Chords(i,j));
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for k = 1:length(x)-1
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thickness(k,j)=findthickness(airfoil{i}, Chords(i,j), x(k));
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end
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wakeX(k,j)=x(k)+yplotLE(i,j);
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wakeY(k,j)=y(j);
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end
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for k = 1:100
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wakeX(k,j)=x(k)+yplotLE(i,j);
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wakeY(k,j)=y(j);
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end
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thickness=[thicknessplot, wake];
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wakeplotX=[wakeplotX, wakeX];
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wakeplotY=[wakeplotY, wakeY];
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end
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end
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thicknessplot(:,1)=[ ];
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wakeplotX(:,1)=[ ];
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wakeplotY(:,1)=[ ];
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wakeplot(1,:)=[0];
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flipud(thicknessplot);
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surf(wakeplotY, wakeplotX, thicknessplot)
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end
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function [q v_fps dynvisc]=findconstants(alt, v_mach)
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if alt < 36152
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temp=59-.00356*alt;
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press=2116*((temp+459.7)/518.6)^5.256;
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elseif alt < 82345
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temp=-70;
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press=473.1*exp(1.73-.000048*alt);
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else
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print('Program Not Valid for given altitude')
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end
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%slpcuft: clugs ber cubic foot
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density_slpcuft=press/(1718*(temp+459.7));
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v_fps=v_mach*sqrt(1.4*1718*(temp+459.7));
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q=finddynpress(alt, v_mach);
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S = 110.4;
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beta = 1.458e-6;
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temp_k=[(temp-32) / (1.8)] + 273 ;
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viscosity_pascalseconds = (beta*temp_k^(1.5))/(temp_k+S);
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%kgpmcu:kilograms per meter cubed
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%msqpse:meters squared per second
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%sqftpsec:square feet per second
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density_kgpmcu=density_slpcuft*515.4;
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dynamic_viscosity_msqpsec=viscosity_pascalseconds/density_kgpmcu;
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dynamic_viscosity_sqftpsec=dynamic_viscosity_msqpsec*10.76;
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dynvisc=dynamic_viscosity_sqftpsec;
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density=density_slpcuft;
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end
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end
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Reference in New Issue
Block a user