Investigation of thrust vector angle control law based on micro-turbojet engine

Author:

Chi Shaoqing1,Gu Yunsong1ORCID,Gong Dongsheng2,Li Linkai1ORCID

Affiliation:

1. Key Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

2. Sichuan Aerospace System Engineering Institute, Chengdu 610000, China

Abstract

The fluid thrust vectoring nozzle has a fixed profile, few moving parts, and lightweight structure, providing effective flight control for high maneuvering aircraft. The nonlinear control law of the jet deflection angle is one of the critical problems of fluid thrust vector technology. However, the research on the deflection control law of the thermal jet in a fluid thrust vectoring nozzle is not ideal. In this paper, the control law of micro-turbojet engines under a thermal jet is studied by numerical simulations and experiments. The numerical results show that the nonlinear control law of the jet deflection angle is caused by the vortex structure between the main jet and the nozzle wall. The numerical results show that the passive flow control method can effectively change the vortex structure distribution on the nozzle wall by changing the shape of the nozzle outlet structure. This change of flow structure can effectively make the jet deflection control law close to linear. The experimental results show that the nozzle with this configuration can continuously and controllably deflect the main jet under the thermal jet of the micro-turbojet engine. The vector deflection control law of this nozzle configuration is close to linear and has less thrust loss.

Funder

National Natural Science Foundation of China

Priority Academic Program Development of Jiangsu Higher Education Institutions

Postgraduate Research & Practice Innovation Program of Jiangsu Province

Publisher

AIP Publishing

Subject

General Physics and Astronomy

Reference28 articles.

1. Experimental Study of Strut Insertion Technique in a Convergent-Divergent Nozzle for Thrust Vector Control

2. Influence of injectant properties for fluid injection thrust vector control

3. D. J. Wing and V. J. Uiuliano, “Fluidic thrust vectoring of an axisymmetric exhaust nozzle at static conditions,” FEDSM97-3228, 1997.

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