A converging-diverging nozzle is designed to operatewith an exit Mach
number of 2. The nozzle is supplied from an air reservoir at 600kPa and temperature
is 300 K. The throat area of the nozzle is 5 cm2
.
Determine:
(a) The ratio of exit-to-throat area and exit area
(b) Given the area ratio in part (a), find the range of backpressure over which the
nozzle is choked. What is the critical pressure and designpressure?
Also, calculate the mass flow rate when the nozzle is choked and atdesign
conditons.
(c) Determine the mass flow rate for a back pressure of 450 kPa and500 kPa.
(d) Determine the mass flow rate for a back pressure of 0kPa.
(e) Plot pressure variation along centerline of nozzle and mark allthe points (back
pressures) on it.
(f) Use excel sheet to plot mass variation Vs back pressures andmark all points
on it.
