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| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進行查看 | |||
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[求助]
【求助翻譯摘要】，關(guān)于換熱器數(shù)值模擬方面的，謝謝！
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| 摘要：采用簡化的二維波紋管模型研究了相同當量直徑而波幅和波距不同的8種管型的正弦波紋管，以常溫下水為工質(zhì)，模擬了不同雷諾數(shù)下?lián)Q熱情況。研究表明，波紋管波幅對波紋管換熱影響顯著，而波距對波紋管換熱影響不顯著，并用場協(xié)同原理分析其原因。進一步考慮波幅與波距的比值ξ，結(jié)果顯示ξ=0.25-0.30之間的波紋管管型換熱量較大。同時模擬了不同雷諾數(shù)下波紋管的綜合換熱性能PEC。結(jié)果表明，雷諾數(shù)較小時波紋管的綜合換熱性能PEC較小，甚至小于1，而在較高雷諾數(shù)下模擬的結(jié)果中最大的PEC能達到1.3左右。通過數(shù)值計算得到了正弦波紋管強化傳熱的最優(yōu)結(jié)構(gòu)以及最佳傳熱雷諾數(shù)范圍。 |
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
木子中一貝: 金幣+30, 翻譯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. |
8樓2015-01-08 19:09:49
2樓2015-01-08 16:03:36
3樓2015-01-08 16:15:17
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