Air enters a constant-area duct with heat transfer q
per unit mass flow rate through the duct. Assuming the flow
is frictionless, calculate
(a) the external heat transfer, q∗
1, that will choke the
Duct
(b) the reset inlet Mach number, M1′ , if q = 3q∗
1
(c) percentage mass flow rate reduction if q = 3q∗