李凤舒,邓晰文,刘瑞,等.摆线转子发动机径向密封片静态泄漏特性[J].内燃机工程,2025,46(5):139-146.
摆线转子发动机径向密封片静态泄漏特性
Static Leakage Characteristics of Radial Seals in a Trochoidal Rotor Engine
DOI：10.13949/j.cnki.nrjgc.2025.05.015
关键词:转子发动机  径向密封片  密封性能  泄漏特性
Key Words:rotary engine  apex seal  sealing performance  leakage characteristic
基金项目:云南省科技计划项目（202302AC080002）
作者单位E-mail
李凤舒* 昆明理工大学 云南省内燃机重点实验室，昆明 650500 1173490907@qq.com 
邓晰文* 昆明理工大学 云南省内燃机重点实验室，昆明 650500 xixiwen@126.com 
刘瑞 昆明理工大学 云南省内燃机重点实验室，昆明 650500 liurui99914@163.com 
万桂银 昆明理工大学 云南省内燃机重点实验室，昆明 650500 2411678216@qq.com 
雷基林 昆明理工大学 云南省内燃机重点实验室，昆明 650500 leijilin@sina.com 
贾德文 昆明理工大学 云南省内燃机重点实验室，昆明 650500 27546658@qq.com 
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摘要:为解决摆线转子发动机径向密封泄漏问题，以摆线转子发动机为研究对象，采用计算流体力学的方法，研究相邻腔室压力差、温度差及等效泄漏面积对摆线转子发动机泄漏过程中压力、速度及质量流量的变化规律。研究结果表明，增大相邻腔室压力差会使泄漏通道达到超临界状态，这种状态下质量流量随前腔室压力增大而增大，当燃烧室压力处于峰值时泄漏质量流量达到最大值。相邻腔室温度差增大会降低泄漏质量流量，泄漏过程在亚音速流动和超音速流动状态下，前腔室温度由400 K升温至1 780 K，泄漏质量流量分别降低50.07%和46.64%。减小等效泄漏面积可有效改善泄漏，在气流为亚音速流动及临界状态下，当等效泄漏面积由2.0 mm2减小为1.1 mm2，泄漏质量流量平均降低69.48%。
Abstract:To address the issue of apex seal leakage in the trochoidal rotor engine， the trochoidal rotor engine was taken as the research subject， and the computational fluid dynamics method was employed. The influence of pressure difference， temperature difference between adjacent chambers， and the equivalent leakage cross-sectional area on the variation of pressure， velocity， and mass flow rate during the leakage process of the trochoidal rotor engine were investigated. The results indicate that increasing the pressure difference between adjacent chambers would lead the leakage channel to reach a supercritical state. Under such a state， the mass flow rate increases as the pressure of the preceding chamber increases. When the pressure in the combustion chamber reaches its peak value， the leakage mass flow rate attains its maximum value. An increase in the temperature difference between adjacent chambers will result in a reduction of the leakage mass flow rate. During the leakage process under subsonic flow and supersonic flow states， the temperature of the front chamber was raised from 400 K to 1 780 K， and the leakage mass flow rate decreased by 50.07% and 46.64% respectively. Leakage can be effectively improved by reducing the equivalent leakage cross-sectional area. When the airflow was in the subsonic flow and critical states and the equivalent leakage area decreased from 2.0 mm2 to 1.1 mm2， the leakage mass flow rate decreased by 69.48% in average.
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