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[求助]
【求助翻译摘要】，关于换热器数值模拟方面的，谢谢！
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| 摘要：采用简化的二维波纹管模型研究了相同当量直径而波幅和波距不同的8种管型的正弦波纹管，以常温下水为工质，模拟了不同雷诺数下换热情况。研究表明，波纹管波幅对波纹管换热影响显著，而波距对波纹管换热影响不显著，并用场协同原理分析其原因。进一步考虑波幅与波距的比值ξ，结果显示ξ=0.25-0.30之间的波纹管管型换热量较大。同时模拟了不同雷诺数下波纹管的综合换热性能PEC。结果表明，雷诺数较小时波纹管的综合换热性能PEC较小，甚至小于1，而在较高雷诺数下模拟的结果中最大的PEC能达到1.3左右。通过数值计算得到了正弦波纹管强化传热的最优结构以及最佳传热雷诺数范围。 |
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木子中一贝: 金币+30, 翻译EPI+1, ★★★★★最佳答案 2015-01-08 19:31:31
木子中一贝: 金币+30, 翻译EPI+1, ★★★★★最佳答案 2015-01-08 19:31:31
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Eight types of sinunoidal corrugated tubes of matching equivalent diameter but of different wave amplitudes and lengths were investigated under the simplified model of 2-dimension corrugated tube . Room temperature water as the working fluid, and heat exchanging effects of various Reynolds numbers were simulated. It proved that the heat exchanging efficiency of the tube has a significantly connection with the wave amplitude while a not-prominent relation with the wave length, and the causes were analysed by the field synergy principle. A further observation on ξ, the ratio of the wave amplitude and the wave length, shows that there is a greater heat exchange when ξ is between 0.25 and 0.30. The optimal heat transfer structure and Re range was calculated by numerical analysis. The results of the simulation show that, at lower Reynolds number there is a smaller PEC, which can be less than 1. The largest PEC can reach 1.3 when the Re is high. Cracking good structure for reinforced sinunoidal corrugated tube heat transfer and optimal Reynolds number range have been obtained by numerical calculation. |
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