NUMERICAL ANALYSIS OF PERFORMANCE OF CLOSED-LOOP PULSATING HEAT PIPE
NUMERICAL ANALYSIS OF PERFORMANCE OF CLOSED-LOOP PULSATING HEAT PIPE
复制标题
闭环脉动热管性能数值分析
DOI：
10.1615/heatpipescietech.v5.i1-4.490
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
P. Jhunjhunwala
中科院分区：
文献类型：
--
作者：
A. Singh;A. Satapathy;P. Jhunjhunwala
对闭环脉动热管的传热特性进行了数值模拟研究。然而，由于系统的复杂性和多物理性质，在GAMBIT中对CLPHP系统进行建模具有许多挑战性的问题。因此，这里建模的闭环脉动热管内部没有热管中存在的芯材料。闭环脉动热管结构简单，需建立数学模型。利用ANSYS Fluent 13.0对闭环脉动热管进行了流动显示。通过适当的边界条件，我们可以可视化模型的行为并对其性能进行预测。以水-水蒸汽、乙醇和乙醇蒸汽为工质，在入口处提供热流。在闭环PHPs中观察到核化沸腾、段塞形成和惯性波传播等现象。分析了在进口（蒸发器）处不同热流密度下，CLPHPs的性能，得到了出口（冷凝器）处的输出热流密度，并找出了不同热流密度和不同工质下的热流密度变化规律。
This presents a computational study on the heat transfer characteristics of closed loop pulsating heat pipe (CLPHPs). However modeling of a CLPHP system in GAMBIT has many challenging issues due to the complexity and multi-physics nature of the system. So, the closed loop pulsating heat pipe modeled here has no wick material inside it as it present in heat pipe. The closed loop pulsating heat pipe has no complex structure so it is to be modeled. Flow visualization was conducted for the closed loop pulsating heat pipe using ANSYS Fluent 13.0. With appropriate boundary conditions we can visualize the behavior of the model and make predictions regarding its performance. Water-water vapor and ethyl alcohol ant ethyl alcohol vapor are taken as the working fluid and heat flux is supplied at the inlet. Phenomena such as nucleation boiling, formation of slug and propagation of inertia wave were observed in the closed loop PHPs. Also the analysis has been done to know the behavior of CLPHPs under varying supply of heat flux at the inlet (evaporator).for this, the output heat flux is obtain at outlet (condenser) and find out how the heat flux is varying for different heat flux and the different working fluid.