Review of Models for Appendix Gap Losses in Stirling Cycle Machines
Review of Models for Appendix Gap Losses in Stirling Cycle Machines
复制标题
斯特林循环机附录间隙损失模型的回顾
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
H. Kuehl
中科院分区：
文献类型：
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作者：
J. Pfeiffer;H. Kuehl
彻底了解附件间隙损失可能有助于通过优化相关设计参数（特别是间隙宽度）来提高斯特林循环机的效率。报告的理论预测和实验结果之间的偏差表明需要进一步细化可用的模型，这些模型可以分为两组。首先，有分析封闭式方法，将讨论其基本假设对准确性的影响。其次，有一些数值的、微分的方法。由于缺乏足够详细的实验数据以及传热建模的不确定性，这些方法的普遍适用性似乎受到限制。现有的建模方法通常可以通过获得间隙中的流动模式和温度分布的解析解来改进，因为发现流动基本上是层流的。然而，惯性效应不可忽视，这...
A thorough understanding of appendix gap losses may help to improve the efficiency of Stirling cycle machines by optimizing related design parameters, particularly the gap width. Reported deviations between theoretical predictions and experimental results suggest the need for further refinement of the available models, which can be classified into two groups. First, there are analytical closed-form approaches, the underlying assumptions of which will be discussed regarding their impact on accuracy. Second, there are some numerical, differential approaches. The general applicability of these appears to be limited due to a lack of sufficiently detailed experimental data and due to uncertainties concerning the modeling of the heat transfer. The existing modeling approaches may generally be improved by analytical solutions for the flow pattern and the temperature profile in the gap, which can be obtained, because the flow is found to be essentially laminar. However, inertia effects are not negligible, which r...