發(fā)布時(shí)間：2018-07-06 14:57

  本文選題：噴射沖擊 + 相變制冷�。� 參考：《低溫與超導(dǎo)》2017年03期

【摘要】：為分析R134a噴射沖擊相變制冷的傳熱效果,以數(shù)值模擬為基礎(chǔ),采用計(jì)算流體力學(xué)的思路,通過控制變量的方法,研究各個(gè)物理因素對(duì)冷卻效果的影響。流道長(zhǎng)度L為定值,分析變量為流道高度C,噴嘴寬度W,喉部寬度D1,噴射出口寬度D2,噴嘴高度H,液相與氣相的體積分?jǐn)?shù)比ω。結(jié)果表明:熱表面的冷卻效果隨流道高度和噴嘴寬度的增大而減小,隨液相與氣相的體積分?jǐn)?shù)比ω的增大而增大;而在止滯點(diǎn)附近的冷卻效果隨喉部寬度和噴嘴高度的減小而增大,在流道出口附近隨喉部寬度和噴嘴高度的增大而增大。在止滯點(diǎn)處,冷卻效果最佳的結(jié)構(gòu)模型為:C/L為0.02,W/L為0.05,D1/L為0.01,D2/L為0.015,H/L為0.03。
[Abstract]:In order to analyze the heat transfer effect of R134a jet shock phase change refrigeration, based on numerical simulation, the effect of various physical factors on cooling effect was studied by using the idea of computational fluid dynamics and the method of controlling variables. The flow channel length L is constant. The analysis variables are as follows: flow channel height C, nozzle width W, throat width D 1, jet outlet width D 2, nozzle height H, volume fraction ratio of liquid phase to gas phase 蠅. The results show that the cooling effect of hot surface decreases with the increase of channel height and nozzle width, and increases with the increase of volume fraction of liquid phase to gas phase. The cooling effect increases with the decrease of throat width and nozzle height near the stagnation point, and increases with the increase of throat width and nozzle height near the outlet of the channel. At the hysteresis point, the best cooling effect model is as follows:% C / L = 0.02nW / L = 0.05g / L = 0.05g / L = 0.01g / L = 0.01g / L = 0.015g / L = 0.015 / h / L = 0.03.
【作者單位】： 太原理工大學(xué)環(huán)境科學(xué)與工程學(xué)院;

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