超音速蒸汽浸没射流尾部速度的实验研究  

EXPERIMENTAL STUDY ON VELOCITY DISTRIBUTION FOR THE TAIL OF SUPERSONIC STEAM JET

作　　者：潘冬冬[1] 武心壮[1] 严俊杰[1] 刘光耀[1] 李文军[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室

出　　处：《工程热物理学报》2010年第8期1324-1326,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50676078;No.50821064);国家重点基础研究计划项目(973)(No.2009CB219803)

摘　　要：针对超音速汽流在20～60℃过冷水中浸没射流进行实验研究,得到射流尾部的速度分布规律。在进口压力为0.3 MPa和0.5 MPa时,随着环境水温的变化,速度分布基本不变。而对同一工况,随着轴向距离的增大,速度逐渐减小,并在径向趋于平缓;随着进口压力的降低,在相同的轴向位置,速度会相应减小,但速度剖面的形状基本一致。从速度分布图中可以看出各个断面流速分布显示出相似性质,轴线上流速最大,距轴越远流速越小。将这一速度分布与圆形紊动自由射流的速度分布进行比较,结果表明两者具有一定相似性。Supersonic steam jet in subcooled water in the range of 20～60℃was investigated experimentally and velocity distribution for the tail of supersonic steam jet was obtained.When the inlet steam pressure was 0.3 or 0.5Mpa,velocity was almost changeless with water temperature increasing.For the same condition,velocity decreased slowly and trended to be gently in the radial direction with the increase of the axial distance.In the same axial location,velocity decreased corresponding and the velocity profile was similar with the inlet steam pressure reducing.It was seen that the peak of the velocity appeared at the axial location and velocity distribution showed the comparability.Velocity distributions of each jet showed that the velocity profile induced by steam jet condensation was very similar to that of the circular turbulent jet flow.

关 键 词：超音速射流 总压 速度 

分 类 号：TK2[动力工程及工程热物理—动力机械及工程]