Analysis of mode transition with thrust smoothing of small turbine/ramjet combined cycle engine

HUANG Hong-chao; WANG Zhan-xue; CAI Yuan-hu

Chinese

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Analysis of mode transition with thrust smoothing of small turbine/ramjet combined cycle engine

更新时间：2026-07-07

- Analysis of mode transition with thrust smoothing of small turbine/ramjet combined cycle engine
- Vol. 24, Issue 12, (2009)
- 作者机构：
  
  西北工业大学动力与能源学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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HUANG Hong-chao, WANG Zhan-xue, CAI Yuan-hu. Analysis of mode transition with thrust smoothing of small turbine/ramjet combined cycle engine[J]. 2009, 24(12).
DOI：

HUANG Hong-chao, WANG Zhan-xue, CAI Yuan-hu. Analysis of mode transition with thrust smoothing of small turbine/ramjet combined cycle engine[J]. 2009, 24(12). DOI：

摘要

基于数值模拟方法开展了小型涡轮冲压组合发动机性能计算与匹配性分析.给出了详细的性能计算流程、设计点参数确定准则和模态转换过程参数计算方法.根据涡喷发动机压气机进口、涡轮出口的总静压参数沿飞行轨迹的变化规律

确定了涡轮模态向冲压模态转换的合理区间.根据冲压燃烧室进口参数和静压平衡等约束条件

确定了小型涡轮冲压组合发动机关键截面几何参数.分析了不同的流量调节阀开度对模态转换过程参数变化的影响.按照推力连续的准则

确定了模态转换过程流量调节阀开度随马赫数的变化规律.最后给出了沿飞行轨迹的涡轮冲压组合发动机推力、比冲和喷管喉道面积的变化.

Abstract

The goal of this study is to establish mathematical model for computing performance and analyzing the thermodynamic parameters variation of turbine/ramjet combined cycle engine during mode transition.Firstly

the computed flow charts of performance and thermodynamic parameters of combined engine

and the criteria of determining design parameters of combined engine were given.Secondly

according to computed performance and thermodynamic parameters along flight trajectory and design limitations

such as the Mach number at ramjet burner entrance＜0.3

the reasonable mode transition periods were optimized

and geometry parameters of critical section were given.Thirdly

the effects of opening area of mode transition valve on thermodynamic parameters

especially the relations of total and static pressure

were analyzed.The quantitative opening area of mode transition valve along flight trajectory were given for satisfying the criteria of thrust smoothing.At last

the thrust and specific impulse of turbine/ramjet combined cycle engine were calculated along flight trajectory.

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