摘要
利用经验模型在计算汽-液两相流升压装置最大出口压力的过程中,计算值与实验值误差较大。针对这一弱点,提出了用直接接触凝结(DCC)理论求解汽-液两相流的一维理论模型,并对如何计算相间质量传递值及各相体积分数等关键问题进行了论述。利用该模型对相关实验中的汽-液两相流升压装置的状态参数进行数值计算,比较准确地获得了给定工况下汽-液两相流升压装置的最大出口压力。利用该模型还模拟计算了不同进口参数下升压装置的最大出口压力。结果表明:在一定范围内,升压装置的最大出口压力随进水温度的升高而降低;随进水流量的增大、工作蒸汽压力的升高而升高。
Taking into account the errors of discharge pressure between experimental and computational values are off limits by the empirical models, one-dimensional theory model of steam-water two-phase lifting pressure facility is constructed and solved by the results based on direct contact condensation, and some key issues, such as inter-phase mass transfer and phase volume fraction, are discussed in detail. In order to validate the model, the maximum discharge pressures are computed and the results are relatively precise to the corresponding experimental data. The maximum discharge pressures at various inlet parameters are also concerned, and the results show the maximum discharge pressure is descended by improving the water temperature, but improved by improving the inlet water mass flow or steam pressure.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第6期30-34,共5页
Nuclear Power Engineering
关键词
两相流
直接接触凝结
汽羽
激波
数值方法
Two-phase flow, Direct contact condensation, Steam plume, Shock wave, Numerical method
