dy = YFlap(t+dt) - YFlap(t)
dx = XFlap(t+dt) - XFlap(t)
CtanTheta = math.cos(math.radians(theta))/math.sin(math.radians(theta))
return CtanTheta - dx/dy
pt5T = root.bisect(Ctan5,0.5,1.5)
XFlap = interp.interp1d(FCurve[:,2],FCurve[:,0],'cubic')
YFlap = interp.interp1d(FCurve[:,2],FCurve[:,1],'cubic')
BNode[0,0] = XFlap(pt5T)
BNode[0,1] = YFlap(pt5T)
BNode[2,1] = AfLoCurve(BNode[2,0])
dy = AfLoCurve(BNode[2,0]+dx) - BNode[2,1]
BTan[1,:] = curves.normVect( ny.array([dx,dy]) )
Line1 = curves.linePtDir2D(BNode[0,:],BTan[0,:])
Line2 = curves.linePtDir2D(BNode[2,:],BTan[1,:])
BNode[1,:] = curves.lineIntersect(Line1,Line2)
BCurve = curves.BezierCurve(BNode,11)
#trailing edge thickness of body part
Fcurve1 = interp.interp1d(FCurve[:,2],FCurve[:,0])
Fcurve2 = interp.interp1d(FCurve[:,2],FCurve[:,1])
def findTE(t):
xx = Fcurve1(t)
yFlap = Fcurve2(t)
yAf = AfUpCurve(xx)
return (yAf-yFlap)-BteThickness
def getFlap(airfoilPath, node1,node2, vectLenRatio1, theta, gap, overlap, deflection,zTE):
dx = 1e-4
dt = 1e-4
Npts = ny.array([25,10]) #flap, main section
tmpAxis = ny.array([.8,-.5])
theta = math.radians(theta)
if overlap < -0.9*gap: gap = ny.abs(overlap)/0.9
airfoil = afLib.readAirfoil(airfoilPath)
node1[0,1] = airfoil.upCurve(node1[0,0])
node1[1,1] = airfoil.getThicknessAtX(node1[1,0])*node1[1,1] + airfoil.loCurve(node1[1,0])
node1[2,1] = airfoil.loCurve(node1[2,0])
tan1 = ny.zeros([3,2]) #tangency of vectors forming flap curve
tan1[0,0] = -dx
tan1[0,1] = -(airfoil.upCurve(node1[0,0]+dx) - airfoil.upCurve(node1[0,0]))
tan1[1,1] = -1.0
tan1[2,0] = dx
tan1[2,1] = airfoil.loCurve(node1[2,0]+dx) - airfoil.loCurve(node1[2,0])
tan2 = ny.zeros([2,2]) #tangency of vectors forming main section lower curve
tan2[0,0] = dx
tan2[0,1] = airfoil.loCurve(node2[0,0]+dx) - airfoil.loCurve(node2[0,0])
tan2[1,0] = math.cos(theta)
tan2[1,1] = math.sin(theta)
for ii in range(3): tan1[ii,:] = curves.normVect(tan1[ii,:])
for ii in range(2): tan2[ii,:] = curves.normVect(tan2[ii,:])
line1 = curves.linePtDir2D(node1[0,:],tan1[0,:])
line2 = curves.linePtDir2D(node1[1,:],tan1[1,:])
line3 = curves.linePtDir2D(node1[2,:],tan1[2,:])
intersect1 = curves.lineIntersect(line1,line2)
intersect2 = curves.lineIntersect(line3,line2)
vectLenMax1 = ny.zeros(3)
vectLenMax1[0] = curves.dist2pts(intersect1,node1[0,:])
vectLenMax1[2] = curves.dist2pts(intersect2,node1[2,:])
tmp = ny.array([airfoil.upCurve(node1[1,0])-node1[1,1] , node1[1,1] - airfoil.loCurve(node1[1,0])])
vectLenMax1[1] = ny.min(tmp)
del tmp
vectLen1 = vectLenRatio1 * vectLenMax1
vect1 = ny.zeros([3,2])
for ii in range(3): vect1[ii,:] = tan1[ii,:] * vectLen1[ii]
xytCurve1,_ = curves.pwBezier(node1,vect1,Npts[0])
xytCurve2 = curves.rotate2D(xytCurve1,ny.array([0.7,0]),math.degrees(theta))
splitPt1 = xytCurve2[ny.argmin(xytCurve2[:,0]),:]
splitPt2 = xytCurve2[ny.argmax(xytCurve2[:,0]),:]
xytCurveInt2 = curves.xytCurveInterp(xytCurve2)
def get_dydt(t):
if t == xytCurve2[-1,2]: t -=dt
pt1 = xytCurveInt2.getCoord(t)
pt2 = xytCurveInt2.getCoord(t+dt)
return (pt2[1]-pt1[1])/dt
t_theta = root.bisect(get_dydt,splitPt1[2],splitPt2[2])
xytCurveInt1 = curves.xytCurveInterp(xytCurve1)
node2[0,1] = airfoil.loCurve(node2[0,0])
node2[2,:] = xytCurveInt1.getCoord(t_theta)[0:2]
line4 = curves.linePtDir2D(node2[0,:],tan2[0,:])
line5 = curves.linePtDir2D(node2[2,:],tan2[1,:])
node2[1,:] = curves.lineIntersect(line4,line5)
xytCurve3 = curves.BezierCurve(node2,Npts[1])
def getTEthickness(t):
pt1 = xytCurveInt1.getCoord(t)
yy = airfoil.upCurve(pt1[0])
thickness = yy-pt1[1]
return thickness-zTE
t_split = root.bisect(getTEthickness,0,1.)
x_split = xytCurveInt1.getCoord(t_split)[0]
split1 = curves.xyCurveSplit(airfoil.up,[],x_split)
split2 = curves.xyCurveSplit(airfoil.up,node1[0,0])
split3 = curves.xyCurveSplit(airfoil.lo,[],node2[0,0])
split4 = curves.xyCurveSplit(airfoil.lo,node1[-1,0])
split5 = curves.xytCurveSplit(xytCurve1,t_split,t_theta)
mainSecCurve = ny.array([split1,split3,xytCurve3[:,0:2],split5[:,0:2]])
mainSecCurve = curves.join(mainSecCurve,[True,False,False,True])
flapCurve = ny.array([split2,xytCurve1[:,0:2],split4])
flapCurve = curves.join(flapCurve,[True,False,False])
flapCurve = curves.rotate2D(flapCurve,tmpAxis,deflection)
tmpFlap = curves.rotate2D(xytCurve1,tmpAxis,deflection)
xytCurveInt3 = curves.xytCurveInterp(tmpFlap)
refPt = mainSecCurve[-1,:]
def getFlapX(t):
return xytCurveInt3.getCoord(t)[0]
dist = minimize(getFlapX,1)
dx = (refPt[0]-overlap) - dist.fun
tmpFlap[:,0] += dx
xytCurveInt2 = curves.xytCurveInterp(tmpFlap)
def getGap(dy):
tmpFlap2 = ny.copy(tmpFlap)
tmpFlap2[:,1] = tmpFlap2[:,1] + dy
xytCurveInt4 = curves.xytCurveInterp(tmpFlap2)
def getDist(t):
pt = xytCurveInt4.getCoord(t)
return curves.dist2pts(pt,refPt)
currentGap = minimize_scalar(getDist,bounds=(0.,2.),method='bounded')
return (currentGap.fun - gap)
dy = root.fsolve(getGap,0)
flapCurve[:,0] = flapCurve[:,0] + dx
flapCurve[:,1] = flapCurve[:,1] + dy
airfoil.mainSec = mainSecCurve
airfoil.flap = flapCurve
airfoil.hasFlap = True
return airfoil
def getFlap(airfoilPath, nodes1,nodes2, vectLen1, theta, gap, overlap, deflection,teThickness):
dx = 1e-4
flapNpts = 100
mainSecTEpts = 8
tmpAxis = ny.array([.8,-.5])
if overlap < -0.9*gap: gap = ny.abs(overlap)/0.9
af = afLib.readAirfoil(airfoilPath)
af.loCurve = af.loCurve
nodes1[0,1] = af.upCurve(nodes1[0,0])
nodes1[2,1] = af.loCurve(nodes1[2,0])
nodes2[0,1] = af.loCurve(nodes2[0,0])
vectLenMax1 = ny.zeros([3,1])
nodes1[1,1] = nodes1[1,1]*af.getThicknessAtX(nodes1[1,0])+af.loCurve(nodes1[1,0])
tmpVecLen = ny.array([af.upCurve(nodes1[1,0])-nodes1[1,1], nodes1[1,1]-af.loCurve(nodes1[1,0])])
print tmpVecLen
vectLenMax1[1] = ny.min(tmpVecLen)
del tmpVecLen
tangency1 = ny.zeros([3,2])
tangency2 = ny.zeros([2,2])
tangency1[0,0] = dx
tangency1[0,1] = af.upCurve(nodes1[0,0]+dx) - af.upCurve(nodes1[0,0])
tangency1[1,1] = -1.
tangency1[2,0] = dx
tangency1[2,1] = af.loCurve(nodes1[2,0]+dx) - af.loCurve(nodes1[2,0])
tangency1[0,:] = - tangency1[0,:]
for ii in range(3): tangency1[ii,:] = curves.normVect(tangency1[ii,:])
#create two lines and get allowable length
line3 = curves.linePtDir2D(nodes1[0,:],tangency1[0,:])
line4 = curves.linePtDir2D(nodes1[1,:],tangency1[1,:])
line5 = curves.linePtDir2D(nodes1[2,:],tangency1[2,:])
Intersect1 = curves.lineIntersect(line3,line4)
Intersect2 = curves.lineIntersect(line4,line5)
vectLenMax1[0] = curves.dist2pts(nodes1[0,:],Intersect1)
vectLenMax1[1] = curves.dist2pts(nodes1[2,:],Intersect2)
for ii in range(3): vectLen1[ii] = vectLen1[ii]*vectLenMax1[ii]
vect1 = ny.zeros([3,2])
for ii in range(3): vect1[ii,:] = tangency1[ii,:]*vectLen1[ii]
tangency2[0,0] = dx
tangency2[0,1] = af.loCurve(nodes2[0,0]+dx) - af.loCurve(nodes2[0,0])
tangency2[1,0] = math.cos(math.radians(theta))
tangency2[1,1] = math.sin(math.radians(theta))
xytCurve1,_ = curves.pwBezier(nodes1,vect1,flapNpts) #flap curve
xytCurveInt1 = curves.xytCurveInterp(xytCurve1)
def getTangency(t):
dt = 1e-4
pt1 = xytCurveInt1.getCoord(t)
pt2 = xytCurveInt1.getCoord(t+dt)
ctan = (pt1[0]-pt2[0])/(pt1[1]-pt2[1])
ctanTheta = math.cos(math.radians(theta))/math.sin(math.radians(theta))
return ctanTheta - ctan
t_theta = root.bisect(getTangency,0.25,1.75)
nodes2[2,:] = xytCurveInt1.getCoord(t_theta)[0:2]
line1 = curves.linePtDir2D(nodes2[0,:],tangency2[0,:])
line2 = curves.linePtDir2D(nodes2[2,:],tangency2[1,:])
nodes2[1,:] = curves.lineIntersect(line1,line2)
xytCurve2 = curves.BezierCurve(nodes2,mainSecTEpts)
def getTEthickness(t):
pt1 = xytCurveInt1.getCoord(t)
yy = af.upCurve(pt1[0])
thickness = yy-pt1[1]
return thickness-teThickness
t_split = root.bisect(getTEthickness,0,1.0)
x_split = xytCurveInt1.getCoord(t_split)[0]
split1 = curves.xyCurveSplit(af.up,[],x_split)
split2 = curves.xyCurveSplit(af.up,nodes1[0,0])
split3 = curves.xyCurveSplit(af.lo,[],nodes2[0,0])
split4 = curves.xyCurveSplit(af.lo,nodes1[-1,0])
split5 = curves.xytCurveSplit(xytCurve1,t_split,t_theta)
mainSecCurve = ny.array([split1,split3,xytCurve2[:,0:2],split5[:,0:2]])
mainSecCurve = curves.join(mainSecCurve,[True,False,False,True])
flapCurve = ny.array([split2,xytCurve1[:,0:2],split4])
flapCurve = curves.join(flapCurve,[True,False,False])
flapCurve = curves.rotate2D(flapCurve,tmpAxis,deflection)
tmpFlap = curves.rotate2D(xytCurve1,tmpAxis,deflection)
xytCurveInt2 = curves.xytCurveInterp(tmpFlap)
refPt = mainSecCurve[-1,:]
def getFlapX(t):
return xytCurveInt2.getCoord(t)[0]
dist = minimize(getFlapX,1)
dx = (refPt[0]-overlap) - dist.fun
tmpFlap[:,0] += dx
xytCurveInt2 = curves.xytCurveInterp(tmpFlap)
def getGap(dy):
tmpCurve = ny.copy(tmpFlap)
tmpCurve[:,1] += dy
xytCurveInt3 = curves.xytCurveInterp(tmpCurve)
def getDist(t):
pt = xytCurveInt3.getCoord(t)
return curves.dist2pts(pt,refPt)
CurGap = minimize(getDist,1.).fun
return CurGap-gap
dy = root.fsolve(getGap,0)
flapCurve[:,0] = flapCurve[:,0] + dx
flapCurve[:,1] = flapCurve[:,1] + dy
af.mainSec = mainSecCurve
af.flap = flapCurve
af.hasFlap = True
testNode = ny.zeros([7,2])
testNode[0,:] = nodes1[0,:]
testNode[3,:] = nodes1[1,:]
testNode[6,:] = nodes1[2,:]
testNode[1,:] = nodes1[0,:] + vect1[0,:]
testNode[2,:] = nodes1[1,:] - vect1[1,:]
testNode[4,:] = nodes1[1,:] + vect1[1,:]
testNode[5,:] = nodes1[2,:] - vect1[2,:]
plt.plot(mainSecCurve[:,0],mainSecCurve[:,1])
plt.hold(True)
plt.plot(xytCurve1[:,0],xytCurve1[:,1])
plt.plot(xytCurve2[:,0],xytCurve2[:,1])
plt.plot(af.up[:,0],af.up[:,1])
plt.plot(af.lo[:,0],af.lo[:,1])
plt.axis([0,1.2,-0.5,0.5])
plt.grid(True)
plt.plot(flapCurve[:,0],flapCurve[:,1])
plt.plot(testNode[:,0],testNode[:,1])
plt.show()
return af