摘要
本文对压力为0．20-0．40 MPa的蒸汽在27℃环境水中超音速浸没射流与凝结换热进行了实验研究。实验与分析结果表明:流场分为汽羽、汽液界面、汽液两相混合区和环境水四个区域;随着蒸汽入口压力的增大,依次出现圆锥-椭圆双层汽羽、圆锥形汽羽和椭圆形汽羽;当蒸汽入口压力从0．20 MPa增大到0．40 MPa时,汽羽的无量纲穿透长度从2．20近似线性增大到4．20,射流平均凝结换热系数随着蒸汽入口压力的增大缓慢减小,其数值在0．67-0．80 MW／(m2·℃)之间变化。
The flow and condensation heat transfer of supersonic steam jet immerged in subcool water was investigated experimentally. The inlet pressure of steam was at the range of 0.20～0.40 MPa and the temperature of subcool water was 27℃. The experimental and analytical results show that： the flow region consists of four different parts, namely steam plume, steam-water interface, steam-water mixing layer and pure water; With the increase of inlet steam pressure at the range of 0.20～0.40 MPa, there are three kinds of steam plume, namely conical-elliptical double layers, conical and elliptical steam plumes, and the non-dimension penetration length of steam plume linearly increases from 2.20 to 4.20 while the condensation heat transfer coefficient slowly decreases from 0.80 to 0.67 MW/（m2·℃）.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第1期68-70,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50676078)
教育部新世纪优秀人才支持计划资助(No.NCET-04-0940)
关键词
超音速
蒸汽射流
凝结
浸没
supersonic
steam jet
condensation
immerged
