燃烧室结构对微型摆式发动机燃烧过程影响的数值模拟  

Numerical Simulation of the Effects of Chamber Structure on Combustion Process in MICSE

作　　者：赵罗光 蒋利桥[1,3,4] 赵黛青 汪小憨[1,3,4] ZHAO Luo-guang;JIANG Li-qiao;ZHAO Dai-qing;WANG Xiao-han(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院大学,北京100049 [3]中国科学院可再生能源重点实验室,广州510640 [4]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640

出　　处：《新能源进展》2018年第3期239-244,共6页Advances in New and Renewable Energy

基　　金：国家重点基础研究发展计划项目(2014CB239600);国家自然科学基金项目(51336010)

摘　　要：基于Fluent-CFD软件建立了摆臂自由运动条件下的微型摆式发动机内燃烧过程三维动态网格数值模型,采用正丁烷氧化一步反应机理模拟了三种内径的燃烧室内流动与燃烧过程,考察了燃烧室内径对系统性能的影响。结果表明:增大内径可以减小燃烧室底部区域燃料残留,促进燃烧更快完成,提高燃烧室内的峰值压力和缩短峰值出现时间,有利于提高发动机的输出功、功率密度和效率。Based on the Fluent-CFD software,a three-dimensional dynamic grid numerical model was established to simulate the combustion process of a micro internal combustion swing engine(MICSE)with a free-swinging arm.One-step reaction mechanism of n-butane oxidation was employed for numerically calculating the flow and combustion processes in the combustion chamber.The effects of three inner diameters of combustion chamber on the output performance of MICSE were compared.The results showed that increasing the inner diameter can reduce the fuel residue at the bottom of the chamber,accelerate combustion,increase the peak pressure and shorten the occurrence time of peak pressure,which is beneficial to improve the output power,power density and thermal efficiency of MICSE.

关 键 词：微型摆式发动机 燃烧室结构优化 燃尽率 系统效率 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]