摘要
针对一种新型差速式、无停顿旋转摆式发动机开展研究,建立MATLAB环境下较为完善的热力学仿真模型,计算结果表明:缩短燃烧持续时间有利于提升发动机性能;泄漏和传热是影响发动机性能的两个主要因素,低频运行时泄漏影响较大,高频运行时传热因素更敏感;发动机效率及功率随间隙尺寸增大而降低,当泄漏间隙一定、频率增大时,效率及功率随之会先增加后减小.考虑泄漏、传热影响后,若泄漏间隙控制在20μm,工作频率50 Hz时发动机达到最大热效率为17.36%,工作频率100 Hz时发动机达到最大功率为2121.2 W.较之微小尺寸级的百瓦级微型热机,微型旋转摆式发动机性能优势明显.
A new type of differential and without-stopping micro swing rotor engine（MSRE） was researched in this paper, and the relatively integral thermodynamic simulation model under the MATLAB environment was developed. The results of calculation show that the shortening of combustion duration is beneficial to the improvement of the engine performance. Both leakage and heat transfer are the main factors affecting the engine performance. The effect of leakage is more serious at low-frequency and the factor of heat transfer is more sensitive at high-frequency. The efficiency and power of MSRE decrease with the leakage gap decreasing. When the leakage gap is constant, as the operating frequency increases, the efficiency and power increase at first and decrease later. Considering the effect of leakage and heat transfer, assuming that the leakage gap is controlled as 20 μm, the maximum thermal efficiency reaches 17.36% at the frequency of 50 Hz, and the maximum power reaches 2121.2 W at the frequency of 100 Hz. Compared with the micro size and one hundred-watt level internal combustion engine, MSRE has significant advantages.
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2017年第6期596-604,共9页
Scientia Sinica(Technologica)
基金
国家重点基础研究发展计划(编号:2014CB239600)资助项目
关键词
微型发动机
热力学模型
燃烧持续时间
传热影响
泄漏影响
频率
micro swing rotor engine
thermodynamic model
combustion duration
heat transfer
leakage
frequency
