泄漏对微型旋转摆式发动机的影响分析

发布时间：2018-03-20 09:54

本文选题：泄漏　切入点：旋转摆式发动机　出处：《工程热物理学报》2016年12期 　论文类型：期刊论文

【摘要】：本文完成了微型旋转摆式发动机驱动机构的设计,并验证其运动规律。为诠释这一新型动力系统的热力循环特性,在Matlab环境下建立了零维仿真模型,获得了发动机周期内的热力过程和性能,并探讨了泄漏效应对发动机性能的影响。研究结果表明:泄漏对发动机热力过程和性能存在显著影响,当工作频率一定时,发动机效率随着间隙高度增加而降低,随着间隙深度的增加而提高;当泄漏间隙一定时,效率随着工作频率先增加后减小,存在最佳工作频率。假定泄漏间隙尺寸控制在20μm,工作频率55 Hz时,发动机达到最大热效率为23.62%,工作频率95 Hz时,发动机达到最大功率为3442 W,相比IHI公司的微型燃气轮机及密歇根大学的摆式发动机无论功重比还是效率都具有显著优势。
[Abstract]:In this paper, the design of micro rotary pendulum engine driving mechanism is completed, and its motion law is verified. In order to explain the thermodynamic cycle characteristics of this new power system, a zero dimensional simulation model is established in Matlab environment. The thermodynamic process and performance in engine cycle are obtained, and the effect of leakage effect on engine performance is discussed. The results show that leakage has a significant effect on engine thermal process and performance, and when the working frequency is constant, The engine efficiency decreases with the increase of the clearance height and increases with the increase of the clearance depth. When the leakage clearance is constant, the efficiency increases first and then decreases with the operating frequency. When the leakage clearance size is controlled at 20 渭 m and the working frequency is 55 Hz, the maximum thermal efficiency of the engine is 23.62 and the working frequency is 95 Hz. The maximum power of the engine is 3442W, which is superior to the micro gas turbine of IHI Company and the tilting engine of the University of Michigan in terms of power to weight ratio and efficiency.
【作者单位】：江苏省航空动力系统重点实验室南京航空航天大学能源与动力学院;
【基金】：国家973计划资助项目(No.2014CB239600)
【分类号】：TK401

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