抗加速度双切线弧流道内气泡动力学行为数值与可视化研究  

Numerical and visualization study on dynamic behavior of bubbles in anti-acceleration double tangent arc channel

作　　者：唐昊 胡定华 李强[1] 张轩畅 韩俊杰[2] TANG Hao;HU Dinghua;LI Qiang;ZHANG Xuanchang;HAN Junjie(MIIT Key Laboratory of Thermal Management of Electronic Devices,School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Aeronautics Computing Technology Research Institute,Xi’an 710068,Shaanxi,China)

机构地区：[1]工信部电子设备热控制重点实验室,南京理工大学能源与动力工程学院,江苏南京210094 [2]航空工业西安航空计算技术研究所,陕西西安710068

出　　处：《化工学报》2024年第9期3074-3082,共9页CIESC Journal

基　　金：国家自然科学基金面上项目(52276070);中央高校基本科研业务费专项资金(30922010903)。

摘　　要：机载电子设备的散热系统设计对飞行器的长航时安全运行具有重要意义。设计了抗加速度的双切线弧流道,针对流道内的气泡动力学行为,开展了基于VOF多相流模型的数值分析与基于高速相机的可视化研究。仿真分析表明,相比于直流道,双切线弧流道中的气泡在流经弯管时,由于离心力的作用,会破裂成小气泡并被甩到远离加热面的位置,使得气液分离。30°双切线弧流道分离能力最弱,但残留在壁面的气泡最少;60°双切线弧流道分离能力最强,但壁面处气泡不易流动。对45°双切线弧流道进行了可视化实验研究,可视化结果与仿真分析一致。仿真计算表明,当流速为1 m/s时,45°双切线弧流道可以有效抵抗5g的加速度。The design of heat dissipation system of airborne electronic equipment is of great significance to the long-flight safe operation of aircraft.An acceleration-resistant double tangent arc flow channel was designed.Numerical analysis based on VOF multiphase flow model and visualization based on high-speed camera were carried out for the dynamic behavior of bubbles in the flow channel.The simulation analysis shows that,compared with the straight channel,the bubbles in the double tangent channel break into small bubbles and are thrown away from the heating surface due to the centrifugal force,which makes the vapor-liquid separation.The tangent arc channel with 30°has the weakest separation ability,but the bubbles remaining on the wall are the least.The separation ability of 60°tangent channel is the strongest,but the bubbles on the wall are not easy to flow.The visualization experiment of 45°tangent channel is carried out,and the visualization results are consistent with the simulation analysis.The simulation results show that when the velocity is 1 m/s,the 45°double tangent channel can effectively resist the acceleration of 5g.

关 键 词：气泡 离心分离 两相流 流体动力学 可视化 

分 类 号：TQ021.1[化学工程]