Thermodynamic cycles in oscillating flow regenerators
Thermodynamic cycles in oscillating flow regenerators
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DOI：
10.1063/1.366217
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发表时间：
1997-11
影响因子：
3.2
通讯作者：
Jingtao Liang
中科院分区：
文献类型：
--
作者：
Jingtao Liang
本文提出了一种分析回热器内振荡气团热力过程的正弦模型。回热器被认为是等效的一束毛细管具有大的热容量。由于气体和管壁之间的完美热接触以及速度和压力之间的适当相移，在一个循环中在毛细管中振荡的气体包裹的总体效果是，它从壁的一个纵向部分吸收热量，并在其位移范围内将热量传递到壁的另一部分。在回热器中工作的每个气体团经历热力学循环。当工作流与回热器的温度梯度方向相同时，它经历热机循环。否则，它将经历制冷循环。回热器可以作为热机或制冷机工作。
A sinusoidal model is proposed to analyze the thermodynamic processes of gas parcels oscillating in a regenerator. The regenerator is considered equivalent to a bundle of capillary tubes with large thermal capacities. With perfect thermal contact between the gas and tube wall and the proper phase shift between velocity and pressure, the overall effect of a gas parcel oscillating in the capillary in one cycle is that it absorbs heat from one lengthwise part of the wall and delivers heat to the other part of the wall within its range of displacement. Each gas parcel working in the regenerator undergoes a thermodynamic cycle. When the work flow is in the same direction as the temperature gradient of the regenerator, it undergoes a heat engine cycle. Otherwise it undergoes a refrigeration cycle. The regenerator can work as a heat engine or as a refrigerator.