Study of the effect of pressure and location of secondary injection inside supersonic nozzle. | [Proceedings of 4th International Bhurban Conference on Applied Sciences and Technology • 2005]

Author(s):

1. Ali Ahmed: National Engineering and Science Commission (NESCOM), Islamabad, Pakistan

2. Ajmal Baig: National Engineering and Science Commission (NESCOM), Islamabad, Pakistan

3. S. Bilal: National Engineering and Science Commission (NESCOM), Islamabad, Pakistan

4. S. Zahir: National Engineering and Science Commission (NESCOM), Islamabad, Pakistan

5. M. A. Khan: National Engineering and Science Commission (NESCOM), Islamabad, Pakistan

Abstract:

Secondary injection in the supersonic mainstream of a CD-nozzle causes an asymmetric pressure distribution on opposite surfaces of nozzle. This variation of pressure distribution produces a usable side force and is related to certain parameters such as the chemical properties of the injectant fluid, mainstream flow parameters and the location of injector relative to the exit. A study is done using a commercial CFD code Fluent6.1 and a standard CD-nozzle to investigate the effect of injection pressure on the injection jet penetration and pressure distribution on the divergent section of the nozzle. Results were obtained as pressure and Mach distributions and as penetration depth (Y/D) for variations in secondary injection pressure (Pinj/Pi) and location of injection (X/L). Other observations made included the formation of induced shock wave and its additional effect such as amplified penetration depth and flow separation and circulation.

Page(s): 13-25

DOI: DOI not available

Published: Journal: Proceedings of 4th International Bhurban Conference on Applied Sciences and Technology, Volume: 0, Issue: , Year: 2005

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