波转子的驱动力形成机理数值模拟研究
Numerical Investigation on Mechanisms of Driving Force in Wave Rotors
产世宁 1陈叶宇 1李凤超 2付超3
作者信息
- 1. 北京航空航天大学宁波创新研究院先进飞行器与空天动力创新研究中心,宁波 315800
- 2. 中国航空发动机研究院,北京 101304
- 3. 北京航空航天大学航空发动机研究院,北京 102206
- 折叠
摘要
自旋波转子用气流的驱动力维持转子旋转,能够显著简化波转子发动机系统结构、提高可靠性.通过数值模拟方法研究不同几何通道内部流动现象对切向驱动力的影响,解释波转子的驱动力形成机理.结果表明:弯曲几何通道中的激波/膨胀波在传播过程中,波面发生倾斜,导致每个通道上下壁面间存在压差,多个通道的正向压差累积最终形成正向驱动力,实现波转子自旋.
Abstract
Self-driven wave rotor keeps the rotor rotating with the driving force of flow,so that it significantly simplifies the structure and enhance the reliability of wave rotor engines.This work numerically investigated the effect of flow phenomena on the tangential driving force on the rotor channels with different channel geometries.Results showed that a shock wave or an expansion wave inclined in a cambered channel.It induces difference in pressure between the upper and lower sidewalls of a channel.The positive pressure difference accelerates in multiple channels,and it forms a positive tangential driving force that enables the wave rotor to rotate by itself.
关键词
自旋波转子/驱动力/弯曲通道/数值模拟Key words
self-driven wave rotor/driving force/cambered channel/numerical simulation引用本文复制引用
基金项目
国家自然科学基金青年科学基金(51906007)
重点实验室项目(6142702200203)
"慧眼行动"创新成果转化应用项目(45367072)
出版年
2024
NETL
NSTL
万方数据