航天推进技术研究院主办
[1]李梦磊,杨雪,杨一言,等.RBCC在模态转换过程中的内流场特性[J].火箭推进,2021,47(06):39-45.
LI Menglei,YANG Xue,YANG Yiyan,et al.Research on internal flow field characteristics of RBCC during mode transition[J].Journal of Rocket Propulsion,2021,47(06):39-45.
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LI Menglei,YANG Xue,YANG Yiyan,et al.Research on internal flow field characteristics of RBCC during mode transition[J].Journal of Rocket Propulsion,2021,47(06):39-45.
RBCC在模态转换过程中的内流场特性
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
47
期数:
2021年06期
页码:
39-45
栏目:
专刊
出版日期:
2021-12-31
- Title:
- Research on internal flow field characteristics of RBCC during mode transition
- 文章编号:
- 1672-9374(2021)06-0039-07
- 分类号:
- V438
- 文献标志码:
- A
- 摘要:
- 为了获得火箭基组合循环(RBCC)发动机在模态转换过程中的工作特性,对基于宽调节比火箭的引射-亚燃模态转换过程中流场进行数值仿真计算。研究了特定几何构型的RBCC隔离段和后段燃烧室在火箭射流和背压综合影响下的波系结构和参数分布规律。研究表明:在火箭射流和背压调节综合作用下,流场可分为主流区、背压影响区和火箭射流影响区,主流会在燃烧室下壁面发生流动分离或气体回流,这恰好为稳定燃烧提供了物理条件 模态转换中,火箭调至小流量工作状态最有利于维持流场参数的稳定,此时特征点处的压力和马赫数值的最大方差仅为0.087和0.003,最大波动幅度为27.44%和8.29%。
- Abstract:
- In order to obtain the working characteristics of RBCC(rocket-based combined cycle)engine in the process of model transition,the numerical simulation of the flow field in the process of ejector-ramjet mode transition based on wide adjustment ratio rocket was carried out. The wave system structure and parameter distribution of RBCC isolator and rear combustor with specific geometry under the combined influence of rocket jet and back pressure were studied. Results show that affected by the rocket jet and back pressure,the flow field can be divided into three areas:the mainstream area,the back pressure influence area and the rocket jet influence area. Mainstream flow separation or gas recirculation occurs on the lower wall of combustor,which provides physical conditions for stable combustion. In the process of mode transition,it is most beneficial to maintain the stability of the flow field parameters by adjusting the rocket to a small flow state.At this point,the maximum variances of the pressure and mach number at the feature point are only 0.087 and 0.003 respectively,and the maximum volatility are 27.44% and 8.29% respectively.
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备注/Memo
收稿日期:2021-08-02 修回日期:2021-08-27
基金项目:国家自然科学基金(51976171)
作者简介:李梦磊(1998—),男,博士,研究领域为火箭基组合循环发动机。通信作者:石磊(1987—),男,博士,副教授,研究领域为吸气式推进和组合推进。
更新日期/Last Update:
1900-01-01