發(fā)布時間：2018-07-30 08:28

【摘要】：采用FLUENT計算軟件,對漸縮型噴嘴和孔口型噴嘴水噴射泵內(nèi)氣液兩相流動過程進(jìn)行了數(shù)值模擬。比較了相同工況下兩種噴嘴結(jié)構(gòu)水噴射泵的抽氣特性,并對水噴射泵內(nèi)部的水相百分?jǐn)?shù)、速度、湍流動能分布進(jìn)行了分析。結(jié)果表明,在相同工況下,孔口型噴嘴抽吸氣體的性能優(yōu)于漸縮型噴嘴的抽氣性能。孔口型噴嘴形成的射流結(jié)構(gòu)有利于與氣相的能量交換和組分混合,漸縮型噴嘴的湍流分布不利于能量交換,大量的能量耗散是其抽吸氣體效率下降的主要原因。對水噴射泵內(nèi)部兩相流動過程進(jìn)行數(shù)值模擬分析,不僅可以加深水噴射泵抽氣機(jī)理的理解,還為水噴射泵的抽氣效率提高和優(yōu)化設(shè)計提供了一定的參考。
[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.
【作者單位】： 東北大學(xué)機(jī)械工程與自動化學(xué)院;墨爾本皇家理工大學(xué)航空機(jī)械及制造學(xué)院;
【基金】：中澳國際合作項目(No.74404015) 遼寧省自然基金項目(No.20102073) 教育部留學(xué)回國博士啟動基金(No.18504032)
【分類號】：TB752.3
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本文編號：2154418