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通过分析对流换热过程中微元控制体内的煨流动平衡,得到类似于热传导过程中煨耗散函数表达形式的对流换热准煨耗散函数,表明对流换热过程中的煅耗散由热传导和对流形成的耗散共同构成。并通过分析对流换热过程的特点,对准煨耗散函数中对流项的影响进行了修正,使用圆管内热充分发展流动与无限宽平行通道内的对流换热过程检验,控制体内准煨耗散函数的计算结果与边界煅流的结果一致,表明文中提出的准煅耗散函数是可靠的。

The entransy dissipation function can be achieved by analyzing the entransy flow in the differential control volume while heat transfer in convection, which is similar to the entransy dissipation in conduction. The similar dissapation is made of entransy dissipating in conduction and convection. The influence of convective term should be corrected according to the actual heat transfer specialty. The entransy dissipation in thermal developed circle and inlet of parallel channel shows that the entransy dissipation computed by dissipation function is according with the entransy flow balance on the boundary lines, which means the allied entransy dissipation function is credible.

参考文献

[1] 吴晶,程新广,孟继安,过增元.层流对流换热中的势容耗散极值与最小熵产[J].工程热物理学报,2006(01):100-102.
[2] 柳雄斌,孟继安,过增元.换热器参数优化中的熵产极值和(火积)耗散极值[J].科学通报,2008(24):3026-3029.
[3] 过增元,梁新刚,朱宏晔.(火积)--描述物体传递热量能力的物理量[J].自然科学进展,2006(10):1288-1296.
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