摘要
分别以不同规格的波纹管为模型，应用FLUENT软件对湍流流动状态下波纹管内的传热进行模拟，分析了流体流动状态和波纹管几何结构参数对传热系数的影响。结果表明，波纹管的壁面平均传热系数随着入口雷诺数的增加而增大；与光滑管相比，在低雷诺数的情况下，波纹管传热强化效率随雷诺数的增大而增大，而随着雷诺数的进一步提高，波纹管的强化传热效果逐步减弱；当波纹管的外径与内径的比值在1．25～1．40时，其传热强化效果最好。
Fluid flow and heat transfer in the corrugated tubes of different size are numerically analyzed through FLUENT, the influence of the fluid flow condition and structural parameter of corrugated tube on the heat-transfer coefficient was studied. It was found that the higher the Reynolds number was, the higher the heat-transfer coefficient~ When the Reynolds number was small,the higher the Reynolds number was, the higher the heat-transfer enhacement rate, while the Reynolds number becomes larger,the heat-transfer enhacement rate will drop with the Reyn- olds number increasing~ For the corrugated tube, the heat-transfer enhancement effect was best when the external diameter is 1.25~1.40 times more than inner diameter.
出处
《石油化工设备》
CAS
2014年第1期14-17,共4页
Petro-Chemical Equipment
基金
广东省科技计划项目(No 2010B01900037)
关键词
波纹管
结构参数
传热系数
传热强化比
corrugated tube
structure parameter
heat-transfer coefficient
heat-transfer en-hancement rate
