Volume 31 Issue 9
Sep.  2016
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SHI Xiao-juan, JI Hong-hu. Optimization design of two dimensional convergent and divergent nozzles' profile based on surrogate models[J]. Journal of Aerospace Power, 2016, 31(9): 2124-2131. doi: 10.13224/j.cnki.jasp.2016.09.010
Citation: SHI Xiao-juan, JI Hong-hu. Optimization design of two dimensional convergent and divergent nozzles' profile based on surrogate models[J]. Journal of Aerospace Power, 2016, 31(9): 2124-2131. doi: 10.13224/j.cnki.jasp.2016.09.010

Optimization design of two dimensional convergent and divergent nozzles' profile based on surrogate models

doi: 10.13224/j.cnki.jasp.2016.09.010
  • Received Date: 2014-12-02
  • Publish Date: 2016-09-28
  • Based on the influence research of design parameters on the aerodynamic performance of two dimensional convergent and divergent (2D-CD) nozzle, the optimization design of 2D-CD nozzles' profile was conducted. The goal of optimization design was to get thrust coefficient as high as possible. The design variables of optimization design were throat aspect ratio, throat radius ratio, convergent half angle, divergent half angle. In the design process, the initial sample points were selected using the orthogonal experiment design method, then the Kriging surrogate model of thrust coefficient for design parameters was established. The analysis and optimization was conducted with the Adaptive Simulated Annealing Algorithm (ASA). The results show that when the throat aspect ratio is 6, throat radius ratio is 0.3, convergent half angle is 15°, divergent half angle is 5.64°, the maximum thrust coefficient of the 2D-CD nozzle is 0.97847, and the flow coefficient is 0.98778.

     

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