Apex seal bottom pressure prediction and leakage analysis of The Hydrogen Fueled Wankel Rotary Engine based on dynamics
Apex seal bottom pressure prediction and leakage analysis of The Hydrogen Fueled Wankel Rotary Engine based on dynamics
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DOI：
10.1016/j.ijhydene.2022.05.029
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发表时间：
2022-06
影响因子：
7.2
通讯作者：
C. Ji;Zhenyu Yang;Jinxin Yang;Shuofeng Wang
中科院分区：
文献类型：
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作者：
C. Ji;Zhenyu Yang;Jinxin Yang;Shuofeng Wang
氢转子发动机的泄漏问题，特别是顶部密封泄漏问题，一直制约着氢转子发动机的发展。在研究中，ASL区域分为几何泄漏区域（GLA）和动态泄漏区域（DLA）。建立了密封下压力预测模型和密封振动模型。分析了GLA和DLA的机理以及关键参数对它们的影响。结果表明，DLA随流量系数、密封间隙的增大而减小。当转速低于2000 rpm或高于7000 rpm时，不存在DLA。此外，DLA值仅为GLA的11.23%，当使用角片结构时，GLA可以降低88.57%。总泄漏量随转速的增加而减小。最后给出了减少泄漏的措施。
The development of hydrogen-fueled Wankel rotary engine is restricted by the leakage problem, especially the apex seal leakage (ASL). In the study, the ASL area is divided into the geometric leakage area (GLA) and the dynamic leakage area (DLA). The models of under-seal pressure prediction and vibration of apex seal are established. The mechanism of GLA and DLA and the effects of key parameters on them are analyzed. Results show that the DLA decreases with the increase of discharge coefficient, clearance between apex seal and slot. There is no DLA when the rotation speed is slower than 2000 rpm or higher than 7000 rpm. Besides, the value of DLA is only 11.23% of GLA and the GLA can be reduced by 88.57% when using a corner-piece structure. The total leakage decreases with the increase of rotation speed. Finally, some measures to reduce the leakage are given.