脉动热管稳态运行的理论模型研究

建立了脉动热管稳态运行机制的物理和数学模型。针对脉动热管中工质的实际流动状态,改进了模型中的流动机理和毛细滞后阻力机理,并耦合脉动热管的充液率、蒸发凝结两相传热模型进行了迭代求解。结果显示,潜热传热量占总传热量的比例在30%以内,管内工质流动属于湍流流动状态,表明改进后的求解模型比较符合脉动热管实际运行工况,较为准确地反映了脉动热管的流动和传热规律。

Theoretical Research of Pulsating Heat Pipe in Steady State

The model of operating mechanism for pulsating heat pipe(PHP) under steady state was established.To simulate the flow state of PHP more actually,the model of flow mechanism and capillary hysteresis resistances were revised.Meanwhile,the fitting ratio of PHP and evaporating-condensing two-phase thermal model were coupled and solved.The results showed that,the ratio of latent heat transfer to sensible heat transfer was within 30 percent,and flow mechanism in PHP was turbulent flow,which demonstrated the modified model could illustrate the flow and heat transfer law more accurately in actual working conditions.