喷嘴结构对水喷射泵抽气效率影响的数值研究
发布时间：2018-07-30 08:28
【摘要】：采用FLUENT计算软件,对渐缩型喷嘴和孔口型喷嘴水喷射泵内气液两相流动过程进行了数值模拟。比较了相同工况下两种喷嘴结构水喷射泵的抽气特性,并对水喷射泵内部的水相百分数、速度、湍流动能分布进行了分析。结果表明,在相同工况下,孔口型喷嘴抽吸气体的性能优于渐缩型喷嘴的抽气性能。孔口型喷嘴形成的射流结构有利于与气相的能量交换和组分混合,渐缩型喷嘴的湍流分布不利于能量交换,大量的能量耗散是其抽吸气体效率下降的主要原因。对水喷射泵内部两相流动过程进行数值模拟分析,不仅可以加深水喷射泵抽气机理的理解,还为水喷射泵的抽气效率提高和优化设计提供了一定的参考。
[Abstract]:The gas-liquid two-phase flow process in the water jet pump with tapered nozzle and orifice nozzle is numerically simulated by FLUENT software. The pumping characteristics of two kinds of nozzle structure water jet pumps under the same working conditions are compared, and the distribution of water phase percentage, velocity and turbulent kinetic energy inside the water jet pump is analyzed. The results show that the suction performance of orifice nozzle is better than that of tapered nozzle under the same working condition. The jet structure formed by the orifice nozzle is favorable to the energy exchange and component mixing with the gas phase, and the turbulent distribution of the tapered nozzle is not conducive to the energy exchange. A large amount of energy dissipation is the main reason for the decrease of the efficiency of the suction gas. The numerical simulation and analysis of the two-phase flow process in the water jet pump can not only deepen the understanding of the pumping mechanism of the water jet pump, but also provide a certain reference for the improvement of the pumping efficiency and the optimization design of the water jet pump.
【作者单位】： 东北大学机械工程与自动化学院;墨尔本皇家理工大学航空机械及制造学院;
【基金】：中澳国际合作项目(No.74404015) 辽宁省自然基金项目(No.20102073) 教育部留学回国博士启动基金(No.18504032)
【分类号】：TB752.3
，
本文编号：2154418
[Abstract]:The gas-liquid two-phase flow process in the water jet pump with tapered nozzle and orifice nozzle is numerically simulated by FLUENT software. The pumping characteristics of two kinds of nozzle structure water jet pumps under the same working conditions are compared, and the distribution of water phase percentage, velocity and turbulent kinetic energy inside the water jet pump is analyzed. The results show that the suction performance of orifice nozzle is better than that of tapered nozzle under the same working condition. The jet structure formed by the orifice nozzle is favorable to the energy exchange and component mixing with the gas phase, and the turbulent distribution of the tapered nozzle is not conducive to the energy exchange. A large amount of energy dissipation is the main reason for the decrease of the efficiency of the suction gas. The numerical simulation and analysis of the two-phase flow process in the water jet pump can not only deepen the understanding of the pumping mechanism of the water jet pump, but also provide a certain reference for the improvement of the pumping efficiency and the optimization design of the water jet pump.
【作者单位】： 东北大学机械工程与自动化学院;墨尔本皇家理工大学航空机械及制造学院;
【基金】：中澳国际合作项目(No.74404015) 辽宁省自然基金项目(No.20102073) 教育部留学回国博士启动基金(No.18504032)
【分类号】：TB752.3
，
本文编号：2154418
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