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首页> 外文期刊>International Journal of Heat and Fluid Flow >Atomized Non-equilibrium Two-phase Flow In Mesochannels: Momentum Analysis
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Atomized Non-equilibrium Two-phase Flow In Mesochannels: Momentum Analysis

机译：中通道雾化非平衡两相流：动量分析

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Two-phase pressure drop measurements are very difficult to make while the fluid is in non-equilibrium condition, i.e. while phase change is taking place. This is further complicated when an atomized liquid is introduced in the system at much higher velocity than other components such as liquid layer, vapor core, and entrained droplets. The purpose of this paper is to develop a model to predict the two-phase pressure characteristics in a mesochannel under various heat flux and liquid atomization conditions. This model includes the momentum effects of liquid droplets from entrainment and atomization. To verify the model, an in-house experimental setup consisting of a series of converging mesochannels, an atomization facility and a heat source was developed. The two-phase pressure of boiling PF5050 was measured along the wall of a mesochannel. The one-dimensional model shows good agreement with the experimental data. The effects of channel wall angle, droplet velocity and spray mass fraction on two-phase pressure characteristics are predicted. Numerical results show that an optimal spray cooling unit can be designed by optimizing channel wall angle and droplet velocity.
机译：当流体处于非平衡状态时，即发生相变时，很难进行两相压降测量。当雾化液体以比其他组分（例如液层，蒸气芯和夹带的液滴）高得多的速度引入系统时，这将变得更加复杂。本文的目的是建立一个模型来预测在各种热通量和液体雾化条件下介观通道中的两相压力特性。该模型包括夹带和雾化产生的液滴的动量效应。为了验证模型，开发了一个内部实验装置，该装置由一系列会聚的介观通道，雾化设备和热源组成。沿中间通道壁测量沸腾的PF5050的两相压力。一维模型与实验数据吻合良好。预测了通道壁角，液滴速度和喷雾质量分数对两相压力特性的影响。数值结果表明，可以通过优化通道壁角度和液滴速度来设计最佳的喷雾冷却装置。

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