摘要
论述了在内燃机缸内速度测量、喷雾粒子粒度测量及燃烧过程温度和组分浓度测量中常用的激光诊断技术和测试方法,并对其工作原理、适用范围与场合、优缺点等进行了比较和分析。相位多谱勒粒子测速(PDPA)技术比较适合于单点速度、粒子尺寸及其分布的测量;粒子图像测速(PIV)技术适合于缸内二维平面速度场的测量;激光全息术是分析喷雾特性的有效途径和测量喷雾液滴尺寸的标准方法;平面激光诱导荧光(PLIF)法已成为喷雾、燃烧过程组分浓度及火焰结构研究的重要工具。
Widely used laser diagnostics technologies and methods in the measurement of in-cylinder velocity, droplet size of a spray, temperature and species concentration in the combustion process of internal combustion engines were discussed in this paper. And their working principles, applicable ranges and locations, advantages and disadvantages were compared and analyzed. Phase doppler particle anemometry （PDPA） is particularly suitable for measurement of a single particle velocity ,particle size and its distribution. Particle image velocimetry（PIV） is fit for measuring in-cylinder 2D velocity field. Laser holography is an effective approach to the analysis of spray characteristics and is a standard measurement technique of the spray droplet size. And planar laser induced fluorescence（PLIF） has become an important tool in the study of spray, species concentration and flame structure of the combustion process in internal combustion engines.
出处
《拖拉机与农用运输车》
2009年第6期1-5,共5页
Tractor & Farm Transporter
基金
国家自然科学基金资助项目(50676067)
中国博士后科学基金资助项目(20070420698)
关键词
内燃机
混合气形成
燃烧过程
激光诊断
缸内流动
Internal combustion engine
Mixture formation
Combustion process
Laser diagnostics
In-cylinder flow
