A supersonic injector fabricated from a CD nozzle (comprising of a circular arc throat and a conical divergent portion) is shown in Fig. 8.7.3 The throat diameter is 0.55cm and the divergence angle is 10°. The axis of the nozzle is inclined at an angle of 45° to the horizontal. The inlet stagnation temperature is 2400K and the mass flow rate is 0.005 kg/s. The static pressure at point O on the axis is the same as the ambient pressure and is equal to 25 kPa. Determine (a) the Mach number at O, (b) the static pressure and Mach number at points A and B and (c) the angle made by the jet boundary with the axis at these points. Sketc.h the jet boundaries with respect to the nozzle centerline for a few nozzle diameters as done in Fig. 8.5.

Transcribed Image Text:

Fig. 8.7 An inclined supersonic injector