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Evaluation of fluidic thrust vectoring nozzle via thrust pitching angle and thrust pitching moment

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Abstract

Shock vector control (SVC) in a converging–diverging nozzle with a rectangular cross-section is discussed as a fluidic thrust vectoring (FTV) method. The interaction between the primary nozzle flow and the secondary jet is examined using experiments and numerical simulations. The relationships between FTV parameters [nozzle pressure ratio (NPR) and secondary jet pressure ratio (SPR)] and FTV performance (thrust pitching angle and thrust pitching moment) are investigated. The experiments are conducted with an NPR of up to 10 and an SPR of up to 2.7. Numerical simulations of the nozzle flow are performed using a Navier-Stokes solver with input parameters set to match the experimental conditions. The thrust pitching angle and moment computed from the force-moment balance are used to evaluate FTV performance. The experiment and numerical results indicate that the FTV parameters (NPR and SPR) directly affect FTV performance. Conventionally, FTV performance evaluated by the common method using thrust pitching angle is highly dependent on the location of evaluation. Hence, in this study, we show that the thrust pitching moment, a parameter which is independent of the location, is the appropriate figure of merit to evaluate the performance of FTV systems.

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Acknowledgments

This work was sponsored by the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, and by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Grant-in-Aid for Scientific Research (C), No. 21560162. It was also supported by the cooperative research program of the Earthquake Research Institute, the University of Tokyo, Japan. The CFD code “FaSTAR” was developed by the Japan Aerospace Exploration Agency (JAXA).

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Authors and Affiliations

  1. Dalian Jiaotong University, No. 794 Huanghe Road, Shahekou District, Dalian, 116028, China

    L. Li

  2. Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan

    M. Hirota, K. Ouchi & T. Saito

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  1. L. Li
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  2. M. Hirota
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  3. K. Ouchi
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  4. T. Saito
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Corresponding author

Correspondence to M. Hirota.

Additional information

Communicated by R. Bonazza.

This paper is based on work that was presented at the 29th International Symposium on Shock Waves, Madison, Wisconsin, USA, July 14–19, 2013.

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Li, L., Hirota, M., Ouchi, K. et al. Evaluation of fluidic thrust vectoring nozzle via thrust pitching angle and thrust pitching moment. Shock Waves 27, 53–61 (2017). https://doi.org/10.1007/s00193-016-0637-0

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  • DOI: https://doi.org/10.1007/s00193-016-0637-0

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