配气系统参数对压缩空气发动机性能的影响  

Effect of Parameters of Compressed Air System on Performances for the Engine

作　　者：左承基[1] 王斌[1] 傅秋阳[1] 欧阳明高[2] 杨福源[2] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《机械工程学报》2008年第4期211-216,共6页Journal of Mechanical Engineering

基　　金：清华大学汽车安全与节能国家重点实验室开放基金(KF2005-005)

摘　　要：为了研究配气系统参数对压缩空气发动机性能的影响,使用瞬态分析方法对压缩空气发动机系统建立数学模型,并运用Flowmaster流体软件进行分析,提出增加压缩空气发动机动力性、改善其经济性的途径和方法。研究结果表明,缩短进气阀上、下游管路长度,增加进气阀上游管路通径,可以提高缸内压力;根据进气阀下游管路中气体流动的马赫数,可以确定进气阀下游管路通径对充气质量的影响规律;增大排气阀通径,采用合适的进气提前角,可以提高指示功率;增大缸内压力,提高进气效率,增加指示功率,有助于提高压缩空气发动机动力性和经济性。Instantaneous state analysis method is used to set up a mathematic model for compressed air engine, and fluid flow software Flowmaster flow software is used for research on the effect of parameters of compressed air system on performances for the engine. Through simulation, approach and method are brought out for increasing compressed air engine power performance and meliorate its economy performance. Research results indicate the following the pressure in the cylinder are increased by shortening up or down stream pipe length before or behind the inlet valve, and expanding upstream pipe diameter; The relation between downstream pipe diameter and charge quality is based on the Mach number in the downstream pipe of inlet valve; Indicative power is increased by expending exhaust valve diameter and adopting appropriate intake advance angle; Enhancing the pressure in the cylinder, improving the efficiency of intake air, increasing the indicative power are beneficial to improve power and economy performances for the compressed air engine.

关 键 词：压缩空气发动机 性能Flowmaster流体软件 

分 类 号：U27[机械工程—车辆工程]