波纹管流动和传热特性的数值模拟

Numerical simulation of flow and heat transfer characteristics of bellows

基于计算流体力学软件Fluent模拟了三维波纹管的流动与传热特性,研究了波纹管结构参数及运行工况变化对阻力特性和传热特性的影响。结果表明:在所模拟的工况范围内,波纹管相比于光管传热特性最多提高1.83倍,1~#波纹管具有最佳的综合换热性能,当Re=5000时,综合换热因子η达到最大值1.33;波纹管波高相对于波纹管间距对强化换热影响较大,当Re>15000时宜选用波高较小的波纹管。

Based on the computational fluid dynamics software Fluent, the flow and heat transfer characteristics of the three dimensional bellows are simulated, and the influence of the structural parameters of the bellows and the change of the operating conditions on the resistance and heat transfer characteristics are studied. The results show that the heat transfer performance of the bellows is up to 1.83 times more than that of the light tube in the simulated operating range. The 1# bellows have the best comprehensive heat transfer performance. When Re=5000, the comprehensive heat transfer factor ETA reaches the maximum value of 1.33. The wave height of the bellows is more influenced by the spacing of the bellows to the heat transfer, and when Re〉15000 is appropriate, select the smaller wave tube of wave height.