作者：卢丰翥, 黄豪中, 杨如枝, 苏志兵, 赵瑞青
作者单位：广西大学机械工程学院, 广西 南宁 530004
关键词：内燃机; 放热率; 示功图; 燃烧分析
摘要：
开发一套基于PC机的内燃机燃烧测试分析系统,并对气缸压力的采集,数据的匀化、光顺处理,动态上止点位置的确定等做介绍。利用测量的气缸压力曲线和能量守恒原理,在LabVIEW软件平台上编写出内燃机燃烧放热率计算程序,研究主要经验参数对放热率及缸内平均温度的影响。结果表明:采用Woschni传热公式计算的放热率曲线值高于采用Eichelberg传热公式和Sitkei传热公式计算的放热率曲线值。扫气系数s的变化对气缸内平均温度有显著影响,s=0.99时的缸内平均温度明显高于s=0.95时的缸内平均温度,两者最高温度相差81.4 K。
Development of combustion test and analysis system for internal combustion engine
LU Feng-zhu, HUANG Hao-zhong, YANG Ru-zhi, SU Zhi-bing, ZHAO Rui-qing
College of Mechanical Engineering, Guangxi University, Nanning 530004, China
Abstract: A combustion test and analysis system based on PC was developed including instruments design and software compiling. The acquisition of cylinder pressure, data homogenization processing, data smoothing processing, as well as the determination of dynamic TDC position were all introduced in this study. Based on the test data of cylinder pressure and energy conservation principle, the heat release rate was calculated by a program in LabVIEW software, and the influences of some parameters on heat release rate and in-cylinder instantaneous average temperature were investigated. The results showed that heat release rate calculated with Woschni heat transfer equation was higher than that with Eichelberg heat transfer equation and Sitkei heat transfer equation. The change of scavenging coefficient φs had a significant effect on average temperature in cylinder. When φs=0.99, the cylinder average temperature was significantly higher than that in φs=0.95 and the maximum temperature difference was 81.4 K.
Keywords: internal combustion engine; heat release rate; indicator diagram; combustion analysis
2014, 40(1): 83-87 收稿日期: 2013-3-29;收到修改稿日期: 2013-6-2
基金项目: 国家自然科学基金项目(51076033);广西大学实验室建设与实验教学改革项目(20110107)
作者简介: 卢丰翥(1987-),男,山东平度市人,硕士,专业方向为内燃机燃烧与排放控制。
参考文献
[1] 解茂昭. 内燃机计算燃烧学[M]. 大连:大连理工大学出版社,2005.
[2] 胡军军,阎小俊,周龙保,等. 内燃机燃烧分析仪的开发与应用[J]. 西安交通大学学报,2001,35(3):261-264.
[3] 朱访君,吴坚. 内燃机工作过程数值计算及其优化[M].北京:国防工业出版社,1997.
[4] Rohrer R, Chehroudi B. Preliminary heat release analysis in a single-cylinder two-stroke production engine[C]//SAE Paper.Detroit,USA:SAE International,1993:1993-01-0431.
[5] 常汉宝,丁家松,安土杰. 柴油机示功图上止点修正的热力学方法研究[J]. 内燃机工程,2003,24(4):78-81.
[6] Girda G F, Moosajee A. On line measurement and improvement of working parameters of a diesel engine-synchronous alternator group[C]//Electrical and Computer Engineering, 2004. Canadian Conference on. IEEE,2004(1):257-260.
[7] Zou X H, Yuan D M, Yang Y. Algorithm design computing dynamic top dead center with compressing line method[J]. Small Scale Internal Combustion Engines and Motorcycles,2003,5(24):79-80.
[8] 陶金田. 内燃机多通道燃烧分析系统的开发及应用[D].天津:天津大学,2007(1):39-41.
[9] 尧命发,段家修,覃军,等. 双燃料发动机燃烧放热规律分析及燃烧特性研究[J]. 内燃机学报,2002,20(4):313-317.
[10] Lapuerta M, Armas O, Hernández J J. Diagnosis of DI diesel combustion from in-cylinder pressure signal by estimation of mean thermodynamic properties of the gas[J]. Applied Thermal Engineering,1999,19(5):513-529.
