摘要
本文采用紊态扩散模型分析了蒸汽浸没射流凝结过程,通过假设紊流区为单相水轴对称流动,利用自由紊动射流理论得到了紊流区轴向温度的计算公式。根据先前给出的温度特性半宽的实验关联式,得到蒸汽浸没射流引起的紊流区单相水射流的虚源,从而给出了计算紊流区轴向温度的半经验公式。本文中利用无量纲穿透长度确定了紊流区的起点位置,在此紊流区范围内,轴向温度的计算值和实验值吻合得较好,相对误差基本在±5%以内。
The steam jet condensation in water was analyzed using turbulent diffusion model by assuming the axisymmetric single-phase flow in the turbulent jet region,and the calculation equation was obtained by using the free turbulent jet.Based on the experimental correlation of jet half-width, the jet virtual source was calculated,and the semi-empirical correlation for predicting the axial temperature distribution was obtained.In this paper,the dimensionless jet penetration length was adopted to determine the turbulent region,where the predicted axial temperature agreed well with the experiments,and the discrepancies were within±5%.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2012年第3期429-432,共4页
Journal of Engineering Thermophysics
基金
国家973计划资助项目(No.2009CB219803)
国家核电技术公司员工自主创新项目(No.SNP-KJ-CX-2011-0008)
关键词
紊流
蒸汽射流
轴向温度
turbulent jet
steam jet
axial temperature
作者简介
武心壮（1982-），男，江苏连云港人，工程师，博士，主要从事核电厂主系统的设计，以及汽液两相流、凝结换热和热力系统的研究。
