壳程流路的数值模拟研究——B,C流路初步分析  

Numerical simulation research of shell side stream——preliminary analysis for B,C streams

作　　者：常佳[1,2] 杨战胜[1,2] 钟玉平[1,2] 孟祥睿[3] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南省洛阳市471000 [2]洛阳双瑞特种装备有限公司,河南省洛阳市471000 [3]郑州大学,河南省郑州市450001

出　　处：《炼油技术与工程》2016年第2期45-50,共6页Petroleum Refinery Engineering

摘　　要：分别在CFD和HTRI软件中对管壳式换热器的计算条件进行了一致性调和,得到了相近的计算结果,证明了采用方法的可行性;同时利用CFD的模拟计算结果对壳程对流传热细节和流路进行了初步分析。通过对比发现,针对壳程错流区和窗口区的压力降和传热系数,HTRI的数据完全一致,而CFD却呈现另一种趋势(ΔP_(C1)≥ΔP_(C2),ΔP_(W1)≤ΔP_(W2),h_(C1)≥h_(C2),h_(W1)≤h_(W2)),针对这一问题,分析认为HTRI的计算方法来源于实验归纳,其局部的处理采用算术平均,故不建议采用HTRI进行非对称布管的换热器热工设计;同时发现折流板不同位置前后的压差并不一致,故经典流路模型A路流的处理过于理想化。总结认为针对管壳式换热器的研究和流路分析法仍需要发展和修正。The conformity calculation conditions for shell tube heat exchangers are established in CFD and HTRI softwares respectively,and the similar results have been obtained,which has proven the feasibility of the method. Meanwhile,the calculation results of CFD are applied for the preliminary analysis of shell side convective heat transfer and stream flow. The comparison of analysis results has found that,for the pressure drop and heat transfer coefficient of shell side cross and window region,HTRI gives identical result,but the CFD has a different tendency（ΔP_（C1）≥ΔP_（C2）,ΔP_（W1）≤ΔP_（W2）,h_（C1）≥h_（C2）,h_（W1）≤h_（W2））.It is believed that the HTRI＇s method comes from generalized experiment result,which has applied local arithmetic average for treatment. Therefore,the asymmetrical tube arrangement is not recommended; It is also found the non-uniform pressure difference in the different positions ahead and after baffle,so it is too idealistic for the treatment of A stream in classical stream analysis. It is concluded that the research of shell and tube heat exchanger and stream analysis still require development and updating.

关 键 词：管壳式换热器 CFD 数值模拟 流路分析 

分 类 号：TK172[动力工程及工程热物理—热能工程]