横向射流中心轨迹和扩展宽度  

Central trajectory and spread width in transverse jet

作　　者：李国能[1] 林江[1] 李凯[1] 郑友取[1] 

机构地区：[1]浙江科技学院轻化工程系,浙江杭州310023

出　　处：《化工学报》2011年第1期66-70,共5页CIESC Journal

基　　金：浙江省科技计划重点项目(2006C21058);浙江省高等学校创新团队(T200918);浙江省高等学校优秀青年教师资助项目~~

摘　　要：In order to study the penetration depth and the spread width in a transverse jet, a flow-visualization based experimental setup was built.A phase tunable laser and CCD system was employed, and several jet to crossflow velocity ratio (r=2, 4, 8, 12, 16) were investigated.Experimental results showed that the jet to crossflow velocity ratio is the key parameter to control the penetration depth and the blending law of the jet, and that larger jet to crossflow velocity ratio resulted in much deeper penetration depth.The experimental data agreed well with the previous reports, and predicting formula was derived as the fitting equation y/rd=1.3615(x/rd)0.5608 with the correlation coefficient R=0.9996.On the other hand, the larger jet to crossflow velocity ratio is not the greater access to the spread width, and in this work, the case of r=8 obtained the largest spread width, and the spread width remains relatively large in a large penetration zone.In order to study the penetration depth and the spread width in a transverse jet, a flow-visualization based experimental setup was built.A phase tunable laser and CCD system was employed, and several jet to crossflow velocity ratio （r=2, 4, 8, 12, 16） were investigated.Experimental results showed that the jet to crossflow velocity ratio is the key parameter to control the penetration depth and the blending law of the jet, and that larger jet to crossflow velocity ratio resulted in much deeper penetration depth.The experimental data agreed well with the previous reports, and predicting formula was derived as the fitting equation y/rd=1.3615（x/rd）^0.5608 with the correlation coefficient R=0.9996.On the other hand, the larger jet to crossflow velocity ratio is not the greater access to the spread width, and in this work, the case of r=8 obtained the largest spread width, and the spread width remains relatively large in a large penetration zone.

关 键 词：横向射流 中心轨迹 扩展宽度 流动显示 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]