激光散射测量系统和激波管装置用于水蒸汽自发成核凝结过程的实验分析  

THE PHENOMENON OF LATENT HEAT RELEASINGDURING CONDENSATION OF WATER VAPOR AT LOW EXPANSION RATE IN RAREFACTION GAS FLOW

作　　者：史琳[1] 胡柱国[1] 蔡颐年 

机构地区：[1]清华大学

出　　处：《西安交通大学学报》1994年第2期91-96,共6页Journal of Xi'an Jiaotong University

摘　　要：在激波管装置上，采用激光散射测量系统探测水蒸汽的自发成核凝结过程，测量不同水蒸汽分压和膨胀率下的膨胀压力及相应的散射光功率随时间变化的曲线，这些曲线标志着水蒸汽相变过程中成核率和凝结量的相对变化量，据此，分析膨胀率和蒸汽分压对成核时间和液滴生长率的影响。In rarefaction gas-flow at low expansion rate prod uced by a shock tube,the processes of conden-sation phase-change of water vapor are detected.The pressure curves with two bumps on them whichoccur d uring the non-isentropic expansion and the scattered curves of light are recorded.The reasionfor causing the two bumps and their affection factors are analyzed.By comparing the pressure curveswith the scattered curves,it is pointed out that at the state of low expansion rate,the Wilson point cor-responding to the maxim um supersat uration state does not occ ur at the onset of light signal increase asconventionallv defined.

关 键 词：激波管 激光散射测量 水蒸气凝结 

分 类 号：TK14[动力工程及工程热物理—热能工程]