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Numerical investigation of freestream flow effects on thrust vector control performance

Forghany, F ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.asej.2017.12.004
  3. Publisher: Ain Shams University , 2018
  4. Abstract:
  5. The current research attempted to apply a numerical investigation for external freestream-flow influence on thrust-vector control. The freestream-flow Mach numbers varying from 0.05 to 1.1 were studied at different flow conditions. Computational modeling and simulation of a converging diverging nozzle with shock-vector control structure was achieved with utilizing the Unsteady-RANS approach and Spalart-Allmaras turbulence model. The present investigation has shown that, freestream-flow is an essential parameter on performance of shock-vector nozzle. Numerical results demonstrate that, increasing freestream Mach number would reduce the thrust-vectoring effectiveness. Furthermore, optimizing fluidic-injection angle would decrease the negative influence of external freestream-flow on thrust-vectoring performance. Besides, increasing secondary-pressure ratio and decreasing nozzle-pressure ratio at different freestream-flows would reduce response time of starting fluidic thrust-vector process. In addition, to conduct the improvement of the future aero-engine designs, the present research attempted to create a database of different external-flows with main parameters that have effects on thrust-vector control. © 2018
  6. Keywords:
  7. Fluidic-injection angle ; Freestream Mach number ; Response time ; Thrust-vector control
  8. Source: Ain Shams Engineering Journal ; 2018 ; 20904479 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S2090447918300042