摘要
蒸汽喷射泵(SDJP)是利用蒸汽在Laval喷嘴中形成的超音速气流来引射过冷水的动力装置,研究了水温及喷射泵结构参数对其性能的影响,结果表明:随着进水温度的升高,蒸汽喷射泵的喷射性能明显下降.由于已有理论模型不能确定进水温度与喷射性能的关系,提出用直接接触凝结(DCC)理论求解汽液两相流控制方程的一维理论模型,根据该模型分析了进水温度升高使蒸汽喷射泵性能下降的原因.
Steam-driven jet pump （SDJP） is a power set which injects the sub-cooled water by the supersonic steam flow formed at the Laval nozzle. The influence of water temperature and structural parameters of the jet pump on the performance of the jet pump were studied. The results show that the ejecting capability of the steam driven jet pump decline obviously with the temperature of feed water rising. Since the existing theory models could not establish the relationship between the feed water temperature and the ejecting capability, a direct contact condensation （DCC） theory was put forward to solve the one-dimensional theory model of the steam-liquid two-phase control equations. The reasons for the steam-driven jet pump＇s capability declining caused by the feed-water temperature rising was analyzed based on this model.
出处
《动力工程》
CAS
CSCD
北大核心
2008年第4期565-568,611,共5页
Power Engineering
关键词
工程热物理
蒸汽喷射泵
两相流
相变
直接接触凝结
汽羽
engineering thermophysics
steam-driven jet pump
two-phase flow
phase change
direct contact condensation
steam plume
