| 摘要: |
| 对边界层内小孔气水多相流场下射流问题开展数值仿真及定常水洞试验研究，建立了适用于边界层内压差驱动下小孔向气腔射流多相流场问题研究的数值仿真计算模型，针对典型孔参数及气水流场条件，对比分析了仿真试验数据，验证了数值仿真模型的正确性及模型计算精度。结合流体质点受力及运动模型及平板边界层理论，分析了气水域压力场特征及水域流动规律对小孔射流过程的作用机理及影响规律，开展了孔参数对射流多相流场特征及射流量的影响研究。获得了小孔射流量估算方法，为航行体上防水装置设计提供数据支撑。 |
| 关键词: 小孔 射流 多相流 边界层 水洞试验 |
| DOI： |
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| 基金项目:装备发展部共用技术基金(41406040402) |
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| Study on Jets of Gas-water Multiphase Flow in Small Holes Drived by Pressure Difference within the Boundary Layer |
| BAO Wen-chun,LIU Yuan-qing,LI Yan,WU Long-long |
| (Beijing Institute of Astronautical Systems Engineering) |
| Abstract: |
| In this paper,numerical simulations and steady water tunnel experimentals are carried out to study the jets of gas-water multiphase flow in small holes within the boundary layer. A computational model is constructed on the gas jet multiphase flow. Based on the comparison of numerical and experimental results, the correctness and accuracy of numerical model are verified by using typical parameters of small holes and conditions of gas-water flow. Combining the model of force and movement for fluid particle with the theory of plate boundary layer,the characteristics of pressure in the gas-water region is analyzed and the effect of the water region conditions on the process of jets in small holes is studied. Meanwhile,the influence of paremeters of small holes on the multiphase flowfield characteristics and jet flow is also studied. The study results of this article can provide methods for the gas-jet mass flow rate calculation and water-seal devices design. |
| Key words: Small holes Jets Multiphase flow Boundary layer Water tunnel experimentals |