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建立了高翅管换热器的计算模型,用AnsysFluent软件对激光器尾气流经高翅管换热器的传热及流阻特性进行了数值模拟。结果表明,横向管间距或纵向管间距增大时,翅片管后可能产生漩涡,横向管间距或纵向管间距的减小对漩涡的形成有抑制作用;横向管间距对换热和流阻特性的影响强于纵向管间距;合理匹配高翅管换热器横向管间距和纵向管间距,可以在保证低压损的情况下实现激光器尾气温度显著降低。
The computational model of high-finned tube heat exchanger was established. The heat transfer and flow resistance characteristics of the laser exhaust gas flowing through the finned tube heat exchanger were numerically simulated with AnsysFluent software. The results show that the vortex may occur when the lateral tube spacing or the longitudinal tube spacing increases. The decrease of the transverse tube spacing or the longitudinal tube spacing may inhibit the vortex formation. The transverse tube spacing has the effect of heat transfer and flow resistance Is better than the vertical tube spacing. Reasonably matching the horizontal tube spacing and the vertical tube spacing of the high-fin tube heat exchanger can significantly reduce the laser tail gas temperature while ensuring low pressure loss.