航空学报 > 2009, Vol. 30 Issue (2): 226-231

二元喷管气动喉道控制的数值模拟

王庆伟1,刘波1,王如根2   

  1. 1. 西北工业大学 动力与能源学院;
    2. 空军工程大学 工程学院
  • 收稿日期:2007-12-12 修回日期:2008-03-27 出版日期:2009-02-15 发布日期:2009-02-15
  • 通讯作者: 王庆伟

Numerical Simulation of Two-dimensional Nozzle Using Fluidic Injection for Throat Area Control

Wang Qingwei1, Liu Bo1, Wang Rugen2   

  1. 1. Department of AeroEngines, Northwestern Polytechnical University;
    2. The Engineering Institute, Air Force Engineering University
  • Received:2007-12-12 Revised:2008-03-27 Online:2009-02-15 Published:2009-02-15
  • Contact: Wang Qingwei

摘要:

采用二阶迎风格式,并结合S-A湍流模型求解N-S方程,对喉部注气的二元拉瓦尔喷管内部和周围流场进行了二维数值模拟,分析了注气总压比、注气总温比、射流缝缝宽和注气角度对喷管气动喉道控制的影响。计算结果表明:喷管相对喉道面积比随注气总压比和射流缝缝宽的增大而基本呈线性地减小,而注气总温比对喷管相对喉道面积比的影响很小;注气角度对气动喉道控制有一定的影响,当注气角度在-30°左右时,相对喉道面积比最小。

关键词: 喷管, 气动喉道控制, 喉道面积, 注气, 注气流量比

Abstract:

In order to study the influence of the ratios of injection pressure and injection temperature, injection slot width and jet angle on fluidic throat control, a two-dimensional flow field inside a nozzle and around it with a jet flow at the throat is numerically simulated by computing the N-S equation through secondorder wind disperse schemes and an S-A model. The results show that the ratio of the throat area decreases almost linearly when the ratio of injection pressure or injection slot width increase, but the injection temperature has little influence on the throat area. Jet angle has some influence on the ratio of throat area, which becomes the smallest when the jet angle is around -30°.

Key words: nozzle, fluidic throat control, throat area, jet flow, ratio of injection flux

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