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自由活塞膨胀机-直线发电机集成系统动力特性研究

张红光, 常莹, 李高胜, 杨富斌, 宋松松, 赵光耀, 王宏进, 贝晨

张红光, 常莹, 李高胜, 杨富斌, 宋松松, 赵光耀, 王宏进, 贝晨. 自由活塞膨胀机-直线发电机集成系统动力特性研究[J]. 北京工业大学学报, 2016, 42(3): 440-446. DOI: 10.11936/bjutxb2015070096
引用本文: 张红光, 常莹, 李高胜, 杨富斌, 宋松松, 赵光耀, 王宏进, 贝晨. 自由活塞膨胀机-直线发电机集成系统动力特性研究[J]. 北京工业大学学报, 2016, 42(3): 440-446. DOI: 10.11936/bjutxb2015070096
ZHANG Hongguang, CHANG Ying, LI Gaosheng, YANG Fubin, SONG Songsong, ZHAO Guangyao, WANG Hongjin, BEI Chen. Dynamic Performance Research of a Free Piston Expander-Linear Generator[J]. Journal of Beijing University of Technology, 2016, 42(3): 440-446. DOI: 10.11936/bjutxb2015070096
Citation: ZHANG Hongguang, CHANG Ying, LI Gaosheng, YANG Fubin, SONG Songsong, ZHAO Guangyao, WANG Hongjin, BEI Chen. Dynamic Performance Research of a Free Piston Expander-Linear Generator[J]. Journal of Beijing University of Technology, 2016, 42(3): 440-446. DOI: 10.11936/bjutxb2015070096

自由活塞膨胀机-直线发电机集成系统动力特性研究

基金项目: 

国家自然科学基金资助项目(51376011)

北京市教育委员会科技计划重点资助项目(KZ201410005003)

北京工业大学研究生科技基金资助项目(ykj-2014-10780)

详细信息
    作者简介:

    张红光(1970—),男,教授,博士生导师,主要从事内燃机余热利用、燃烧试验与测试、汽车代用燃料、内燃机电子控制、能源规划与管理方面的研究,E-mail:zhg5912@263.net

  • 中图分类号: TK115

Dynamic Performance Research of a Free Piston Expander-Linear Generator

  • 摘要: 为了提高车用内燃机余热能回收系统中膨胀机热功转换效率,通过试验与仿真相结合的方法,在压缩空气平台上对一台自由活塞膨胀机-直线发电机集成系统进行了试验研究,同时,基于MATLAB/Simulink软件搭建了系统仿真模型并进行了验证.基于该仿真模型研究了活塞初始位移、活塞-动子连杆质量以及工作频率等对系统动力特性的影响.结果表明:当仿真进气压力为0.188 MPa、工作频率为2.5 Hz时,初始位移存在唯一值-0.045 307 m,使得活塞以位移0点为中心做往复运动;当进气压力、工作频率一定时,活塞运动行程、速度峰值、加速度峰值以及指示功均随活塞-动子连杆质量增大而减小.当系统启动时,工作频率应高于固有撞击频率f0,避免活塞对气缸顶面(或端面)产生撞击.
    Abstract: To improve the thermal conversion efficiency of the expander applied in the organic Rankine cycle for recovering low-grade waste heat from internal combustion engine,the performance of a free piston expander-linear generator was studied by experiments and simulations in the air test rig. A simulation model built by MATLAB / Simulink software was verified by experiments,and the influence of the initial displacement of the piston,the piston-mover mass and working frequency on the dynamic characteristics was studied. The results show that there is only one point(- 0. 045 307 m) that enables the piston to do reciprocating motion near the displacement of 0 point when inlet pressure and working frequency are 0. 188 MPa and 2. 5 Hz,respectively. Stroke length,peak velocity,peak acceleration and indicated work of the piston decrease with the piston-mover mass increasing. To protect the system of free piston expander-linear generator from damage,the frequency can not be too low,otherwise the piston will hit the cylinder.
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出版历程
  • 收稿日期:  2015-07-24
  • 网络出版日期:  2023-01-10

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