中国电机工程学报2012，Vol.32Issue(17)：76-81,6.
菱形自由射流与圆形自由射流流动特性的粒子图像测速研究
Particle Image Velocimetry Measurements of Turbulent Jets Issuing From Diamond and Circular Orifice Plates
摘要
Abstract
Detailed mean flow and turbulence measurements were made in the near field and the transition field of two air/air turbulent jets issuing from a diamond orifice plate and a circular counterpart. Particle image velocimetry （PIV） was used for the measurements of the flow field with the exit Reynold number （ 72 000）, based on the exit mean velocity Ue and the equivalent diameter De. Compared with the circular jet, the diamond jet is found to have a superior mixing capability. This is reflected by a shorter potential core, higher decay and spread rates of the jet and also the faster turbulence intensity growth. In addition, the phenomenon of axis switching is also found to occur in this jet.关键词
菱形射流/圆形射流/自由射流/湍流混合/粒子/图像测速测量/半值宽转换Key words
diamond jet/circular jet/free jet/turbulentmixing/particle image velocimetry (PIV) measurement/axis-switching分类
数理科学引用本文复制引用
陈冬林,贠英,米建春,成珊,邓涛..菱形自由射流与圆形自由射流流动特性的粒子图像测速研究[J].中国电机工程学报,2012,32(17):76-81,6.基金项目
国家自然科学基金项目 （）
湖南省自然科学基金重点项目（11112022）. （）
