Volume 36 Issue 3
Mar.  2021
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WANG Hai, SUN Bo, ZHUO Changfei. Numerical investigation on throttle characteristics of precooled engine inlets[J]. Journal of Aerospace Power, 2021, 36(3): 553-563. doi: 10.13224/j.cnki.jasp.2021.03.011
Citation: WANG Hai, SUN Bo, ZHUO Changfei. Numerical investigation on throttle characteristics of precooled engine inlets[J]. Journal of Aerospace Power, 2021, 36(3): 553-563. doi: 10.13224/j.cnki.jasp.2021.03.011
shu

Numerical investigation on throttle characteristics of precooled engine inlets

doi: 10.13224/j.cnki.jasp.2021.03.011

  • School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

  • Received Date: 2020-07-16
  • Publish Date: 2021-03-28
    Abstract
  • In order to study the throttle characteristics of the precooled engine inlet before and after precooling, the two-dimensional axisymmetric inlet was used as the object, and the porous medium coupled source term method was used to conduct numerical simulation research. Under different working conditions, the precooling effect and the aerodynamic performance before and after precooling were compared. Studies indicated that when the mass-flow-ratio of turbine channel increased, the cone surface pressure of the subsonic diffuser section decreased, the area of the low-velocity zone decreased, the coefficients of total pressure recovery of both outlets showed a downward trend, and the precooling effect of the turbine channel was better. The total temperature of the outlet of the ramjet channel was also reduced by the influence of the precooler, and the degree of decline at high-velocity conditions was larger, but the degree of decline was not affected by the mass-flow-ratio of the turbine channel. In the high-velocity working condition of the same mass-flow-ratio of turbine channel, the turbine channel flow capacity was enhanced after precooling.

     

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