摘要
为了研究泵内压降和水力损失耦合诱导泵内液氮空化,采用Zwart空化模型和RNG k-ε湍流模型,并使用CEL语言将饱和蒸气压随温度变化函数关系式导入CFX软件中进行求解,对不同流量下低温泵的空化特性曲线进行分析。研究结果表明,低温泵内压力、温度和空泡体积分数分布与空化的发展程度有关,由于水力损失的作用,小流量工况下,泵内会出现涡状流,从而对叶轮内空化产生影响。
In order to study the cavitation of liquid nitrogen in the pump induced by the coupling of pressure drop and hydraulic loss,Zwart cavitation model and RNG k-εturbulence model were used,and the functional relationship between saturated steam pressure and temperature was imported into CFX software by CEL language for solution.The cavitation performance curves of the cryogenic pump at different flow rates were analyzed.The results show that the distribution of pressure,temperature and vapor volume fraction distribution in the cryogenic pump is related to the development of cavitation.Due to the effect of hydraulic loss,under the low flow rate condition,there will be a vortex flow in the pump,which has an impact on the cavitation in the impeller.
作者
刘浩鹏
邵春雷
Liu Haopeng;Shao Chunlei(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《低温工程》
CAS
CSCD
北大核心
2020年第2期39-45,共7页
Cryogenics
基金
江苏省自然科学基金项目(BK20191361)
江苏省“六大人才高峰”项目(GDZB-032)
江苏省高等学校自然科学研究重大项目(17KJA480003)。
关键词
低温泵
压降
水力损失
空化
数值模拟
cryogenic pump
pressure drop in the pump
hydraulic loss
cavitation
numerical simulation
