摘要
本文针对喷嘴喉部直径为8 mm、出口直径为9.6 mm,压力为0.2～0.6 MPa的蒸汽在温度变化范围为20～70℃环境水中形成的超音速蒸汽浸没射流凝结进行了实验研究。实验观察到了五种典型的汽羽:渐缩形、膨胀-收缩形、双膨胀-收缩形、膨胀-收缩-发散形和发散形汽羽。实验测定了流场的压力分布并对轴线压力分布规律与汽羽凝结形态进行了对照分析;同时给出了流场的压力分布图,反映了流场中压力的影响范围随着蒸汽入口压力和过冷水温度的增加而逐渐扩大的规律。
In this paper,for the nozzle with throat diameter of 8 mm and exit diameter of 9.6 mm,the supersonic steam jet formed with the steam pressure 0.2～0.6 MPa submerged in water with the temperature 20～70℃were studied.Five kinds of typical steam plumes were observed：a tapered shape, expansion-contraction-shaped,double-expansion-contraction shape,expansion-contraction-divergence shape and divergence.The flow field pressures distribution were measured and The comparative analysis between the axis pressure distribution and the vapor plume condensation morphology were conducted;The experiment also given the pressure of the flow field distribution to reflect that the pressure range of the flow field with the steam inlet pressure and supercooled water temperature increased gradually expanded.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第5期781-784,共4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)
关键词
超音速射流
蒸汽凝结
汽羽形状
压力分布
supersonic steam jet
steam condensation
shape of steam plume
pressure fields
