Effect of Secondary Injection Reaction Thermal Resistance on Thrust Vector Control in Divergent Section

2018 ◽  
Author(s):  
Yang Cheng ◽  
Ningfei Wang ◽  
Kan Xie ◽  
Changchao Guo
Keyword(s):  
Thermal Resistance ◽  
Vector Control ◽  
Thrust Vector Control ◽  
Thrust Vector ◽  
Secondary Injection

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

1968 ◽  
Vol 72 (686) ◽  
pp. 171-177 ◽  
Author(s):  
John H. Neilson ◽  
Alastair Gilchrist ◽  
Chee K. Lee
Keyword(s):  
Vector Control ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Three Dimensional Flow ◽  
Side Force ◽  
Thrust Vector Control ◽  
Dimensional Flow ◽  
Two Dimensional Flow ◽  
Thrust Vector ◽  
Secondary Injection

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.

scholarly journals Numerical Simulation of Nozzle Flow Field with Secondary Injection Thrust Vector Control

2018 ◽  
Vol 179 ◽  
pp. 01003
Author(s):  
H.R. Noaman ◽  
Tang Hai Bin ◽  
Elsayed Khalil
Keyword(s):  
Vector Control ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Stagnation Pressure ◽  
Injection Angle ◽  
Thrust Vector Control ◽  
Thrust Vector ◽  
Shock Impingement ◽  
Secondary Injection

Numerical simulations are performed to characterize the secondary injection thrust vector control. For this objective the following measurements were taken: considering the flow to be compressible and turbulent using Realizable k-ε turbulence model accompanied by enhanced wall treatment, the comparison between the CFD results and the experimental results shows a very good agreement. Then a parametric study on injection mass flow rate (changing secondary stagnation pressure) with the same injection location and injection angle is done. The results stated that increasing the injectant mass flow rate lead to shock impingement from opposite wall at secondary stagnation pressure 1.4 of the primary stagnation pressure.

scholarly journals Computer Simulation of Thrust Vector Control Systems Using Secondary Injection

1970 ◽  
Vol 18 (198) ◽  
pp. 255-262
Author(s):  
Akinao NARA ◽  
Seiichi KANEMA ◽  
Haruo KOIZUMI ◽  
Masamichi OZAKI ◽  
Hidemaro WACHI ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Vector Control ◽  
Control Systems ◽  
Thrust Vector Control ◽  
Thrust Vector ◽  
Secondary Injection
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