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Theoretical Aspects of Thrust Vector Control by Secondary Gas Injection in Rocket Nozzles

Published online by Cambridge University Press:  04 July 2016

John H. Neilson ,
Alastair Gilchrist  and
Chee K. Lee
John H. Neilson
Affiliation:
University of Strathclyde, Glasgow, Scotland
Alastair Gilchrist
Affiliation:
University of Strathclyde, Glasgow, Scotland
Chee K. Lee
Affiliation:
University of Strathclyde, Glasgow, Scotland
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Extract

This work deals with theoretical aspects of thrust vector control in rocket nozzles by the injection of secondary gas into the supersonic region of the nozzle. The work is concerned mainly with two-dimensional flow, though some aspects of three-dimensional flow in axisymmetric nozzles are considered. The subject matter is divided into three parts. In Part I, the side force produced when a physical wedge is placed into the exit of a two-dimensional nozzle is considered. In Parts 2 and 3, the physical wedge is replaced by a wedge-shaped “dead water” region produced by the separation of the boundary layer upstream of a secondary injection port. The modifications which then have to be made to the theoretical relationships, given in Part 1, are enumerated. Theoretical relationships for side force, thrust augmentation and magnification parameter for two- and three-dimensional flow are given for secondary injection normal to the main nozzle axis. In addition, the advantages to be gained by secondary injection in an upstream direction are clearly illustrated. The theoretical results are compared with experimental work and a comparison is made with the theories of other workers.

Type
Supplementary Papers
Information
The Aeronautical Journal , Volume 72 , Issue 686 , February 1968 , pp. 171 - 177
Copyright
Copyright © Royal Aeronautical Society 1968 

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References

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