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Secondary Gas Injection into Rocket Nozzles through Ports Mutually at Right Angles

Published online by Cambridge University Press:  04 July 2016

J. H. Neilson ,
A. Gilchrist  and
C. K. Lee
J. H. Neilson
Affiliation:
University of Strathclyde, Glasgow
A. Gilchrist
Affiliation:
University of Strathclyde, Glasgow
C. K. Lee
Affiliation:
University of Strathclyde, Glasgow
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Extract

The side force produced by gas injection through a single port into the supersonic regime of a rocket nozzle is composed of the natural reaction of the fluid leaving the port and the force due to pressure fields set up within the nozzle by the interaction of the secondary and primary flows. The obstruction presented to the main flow by the entering secondary fluid produces a shock system originating from the vicinity of the injection port. The pitch and yaw of a rocket can be controlled by simultaneous secondary gas injection from two ports mutually at right angles. With two ports operating, the respective shock wave systems produced can interact and hence cause an alteration of the side forces which would be produced if the ports were operating independently.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 74 , Issue 719 , January 1977 , pp. 899 - 902
Copyright
Copyright © Royal Aeronautical Society 1970 

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References

1. Neilson, J. H., Gilchrist, A and Lee, C. K. Side Thrust Control by Secondary Gas Injection into Rocket Nozzles. Journal of Mechanical Engineering Science, Vol 10, No 3, June 1968.Google Scholar
2. Neilson, J. H., Gilchrist, A. and Lee, C. K. Control Forces in Rocket Nozzles Produced by a Secondary Gas Stream Inclined at Various Angles to the Nozzle Axis. Journal of Mechanical Engineering Science, Vol 11, No 2, April 1969.Google Scholar
3. Neilson, J. H., Gilchrist, A. and Lee, C. K. Thrust Vector Control by Secondary Gas Injection in Two-Dimensional Nozzles. AJRAeS, Vol 72, No 685, January 1968.Google Scholar