def f_etas(etas, stator, rotor, one, two, thr, gamma, cp, R, GR, psi,
DeltaH_prod, bounds_angles, RHT, mdot):
stator.eta = etas[0]
rotor.eta = etas[1]
# 1.
# mach 3 converge until calculated value meets the initial guess
# inside of this function, alpha2 and beta 3 are also set so that the DeltaH is met
one, two, thr, stator, rotor = converge_mach3(one, two, thr, stator,
rotor, gamma, cp, R, GR,
psi, DeltaH_prod,
bounds_angles)
# 1.2
# calculate loss coefficients
stator = f.losses(two.vel.V, two.vel.Vs, one.P0, two.P0, two.P, stator)
rotor = f.losses(thr.vel.W, thr.vel.Ws, two.P0r, thr.P0r, thr.P, rotor)
# 1.4
# compute total condtions
thr.T0, thr.P0 = f.total_conditions(thr.T, thr.vel.V, thr.P, cp, gamma)
# 2.
# establish geometry after assuming RHT
solve_geometry(RHT, one, two, thr, mdot, R, gamma, cp)
# efficiency calculations
stator.eta = (one.T0 - thr.T0) / (one.T0 -
(thr.Ts + thr.vel.V**2 / 2 / cp))
rotor.eta = (one.T0 - thr.T0) / (one.T0 - thr.Ts)
diff1 = abs(stator.eta - etas[0])
diff2 = abs(rotor.eta - etas[1])
return np.array([diff1, diff2])
def f_etas(etas, stator, rotor, one, two, thr, gamma, cp, R, GR, psi,
DeltaH_prod, bounds_angles, RHT, mdot):
stator.eta = etas[0]
rotor.eta = etas[1]
# 1.
# mach 3 converge until calculated value meets the initial guess
# inside of this function, alpha2 and beta 3 are also set so that the DeltaH is met
one, two, thr, stator, rotor = converge_mach3(one, two, thr, stator,
rotor, gamma, cp, R, GR,
psi, DeltaH_prod,
bounds_angles)
# 1.2
# calculate loss coefficients
stator = f.losses(two.vel.V, two.vel.Vs, one.P0, two.P0, two.P, stator)
rotor = f.losses(thr.vel.W, thr.vel.Ws, two.P0r, thr.P0r, thr.P, rotor)
# 1.4
# compute total condtions
thr.T0, thr.P0 = f.total_conditions(thr.T, thr.vel.V, thr.P, cp, gamma)
# 2.
# establish geometry after assuming RHT
solve_geometry(RHT, one, two, thr, mdot, R, gamma, cp)
# efficiency calculations
stator.eta = (one.T0 - thr.T0) / (one.T0 -
(thr.Ts + thr.vel.V**2 / 2 / cp))
rotor.eta = (one.T0 - thr.T0) / (one.T0 - thr.Ts)
# calculate reynolds numbers
f.reynolds(two, thr)
f.trailing_throat(two, thr)
# use kacker-okapuu to calculate losses in stator and rotor
stator.omegaKC = kackerokapuu('stator', two.geo.s, abs(one.alpha),
abs(two.beta), two.geo.c, two.geo.bx,
two.geo.h, one.vel.M, two.vel.M, one.P,
two.P, gamma, RHT, two.Re, two.geo.to)
rotor.omegaKC = kackerokapuu('rotor', thr.geo.s, abs(two.alpha),
abs(thr.beta), thr.geo.c, thr.geo.bx,
thr.geo.h, two.vel.M, thr.vel.M, two.P,
thr.P, gamma, RHT, thr.Re, thr.geo.to)
diff1 = abs(stator.omega - stator.omegaKC)
diff2 = abs(rotor.omega - rotor.omegaKC)
print(diff1, diff2)
return np.array([diff1, diff2])