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

作　　者：产世宁 陈叶宇 李凤超 付超[3] CHAN Shining;CHEN Yeyu;LI Fengchao;FU Chao(Aircraft&Propulsion Laboratory,Ningbo Institute of Technology,Beihang University,Ningbo 315800,China;Aero Engine Academy of China,Beijing 101304,China;Research Institute of Aero-Engine,Beihang University,Beijing 100191,China)

机构地区：[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

出　　处：《工程热物理学报》2024年第3期725-732,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年科学基金项目(No.51906007);重点实验室基金项目(No.6142702200203);“慧眼行动”创新成果转化应用项目(No.45367072)。

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。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 

分 类 号：V235.12[航空宇航科学与技术—航空宇航推进理论与工程]