用ANSYS CFX软件采用基于有限元的有限体积法对简化的缠绕管式换热器的壳程流动进行模拟，考察管束导程和壳程流速等参数对缠绕管式换热器壳程流体流动特性的影响。结果表明，减小缠绕管束的导程可提高壳程流体的湍流程度，增强壳程流体的均匀程度，减少温度死区并提高换热效率，减小同一截面不同区域的压力差，进而减小因流场不均匀而对管束产生的破坏性应力。提高壳程流速可增强换热，但会增加壳程压降。
As a new kind of efficient and compact heat exchange equipment, spiral-wound heat exchangers which has the characteristics of high heat transfer efficiency, high degree of intensification, less floor space and so on can realize heat transfer among multiple logistics. These advantages can decrease the overall investment. Although many scholars have studied the spiral-wound heat exchangers by numerical simulation, the effects of every operating parameter on the flowing and heat transferring in the shell domain still need to be studied deeply. In this work the shell fluid field of a simplified spiral-wound heat exchanger was simulated by finite volume method based on finite element method with the commercial software ANSYS CFX. By changing the helical leads of spiral tubes and shell inlet velocities, the flow characteristics and heat transfer performance of the shell fluids in spiral-wound heat exchangers were discovered. What is more, some beneficial reference basis was provided for the optimization designs of the spiral-wound heat exchangers. The results showed that the less the helical leads of spiral tubes in the spiral-wound heat exchangers, the higher vorticity and turbulence of the shell fluid domain, the less the temperature dead zone, the better the heat transfer performance between the shell fluid domain and tube fluid domain. Furthermore, reducing the helical leads of spiral tubes in the spiral-wound heat exchangers could make the pressure distribution in the shell fluid domain more balance, which reduced the damage caused by the pressure difference between different regions in the shell fluid domain. Increasing the inlet velocity of shell fluid field was beneficial to enhance heat transfer performance between the shell fluid domain and the tube fluid domain, the pressure drop between the inlet of the shell fluid domain and the outlet of the shell fluid domain increased.
[1] 王艳. 换热器网络的优化及可视化 [D]. 湘潭：湘潭大学. 2004: 1-2.
Wang Y. The Optimum Design and Display of Heat Exchanger Networks[D]. Xiangtan: Xiangtan University. 2004: 1-2.
[2] 张周卫，薛佳幸，汪雅红，李跃. 缠绕管式换热器的研究与开发[J]. 机械设计与制造, 2014, (9): 12-17.
Zhang Z W, Xue J X, Wang Y H, Li Y. Research and Develop on Coil-Wound Heat Exchanger[J]. Machinery Design & Manufacture, 2014, (9): 12-17.
[3] 王斯民，简冠平，肖娟，王家瑞，文键. 缠绕管式换热器结构参数多目标优化数值模拟研究[J]. 西安交通大学学报, 2017,51:9-15.
Wang S M, Jian G P, Xiao J, Wang J R, Wen J. Multi-Objective Optimization on the Structural Parameters of Spiral Wound Heat Exchanger[J]. Journal of Xi’An Jiao Tong University, 2017,51:9-15.
[4] 张勇，刘鸿彦，李守谦. 缠绕管式换热器壳程流体特性分析[J]. 石油和化工设备, 2016,19(3):16-21.
Zhang Y, Liu H Y, Li S Q. Chan Rao Guan Shi Huan Re Qi Ke Cheng Li Ti Te Xing Fen Xi[J]. Shi You He Hua Gong She Bei, 2016,19(3): 16-21.
[5] 刘博，李庆生，李淑恒. 单根缠绕管绕流的二维数值模拟[J]. 石油机械, 2016,44(2):111-116.
Liu B, Li Q S, Li S H. 2D Numerical Simulation of Fluid Flow around the Single Spiral Tube [J]. CHINA PETROLEUM MACHINERY, 2016, 44(2):111-116.
[6] 田杨，陈光辉，李建隆. 水滴型缠绕管换热器壳程流动与传热研究[J]. 化工设计通讯, 2017, 43(7): 147-151.
Tian Y, Chen G H, Li J L. Study on Flow and Heat Transfer of Shell-side Coil-wound Heat Exchanger in Water Drop Type[J]. Chemical Engineering Design Communications, 2017, 43(7): 147-151.
[7] Ren Y, Cai WH, Chen J, et al. The heat transfer characteristic of shell-side film flow in spiral wound heat exchanger under rolling working conditions[J]. Applied Thermal Engineering, 2018,132:233-244.
[8] Ren Y, Cai WH, Jiang YQ. Numerical study on shell-side flow and heat transfer of spiral-wound heat exchanger under sloshing working conditions[J]. Applied Thermal Engineering, 2018,134:287-297.
[9] Wu ZY, Wang H, Cai WH, et al. Numerical investigation of boiling heat transfer on the shell-side of spiral wound heat exchanger[J]. Heat And Mass Transfer, 2016,52:1973-1982.
[10] Duan ZD, Ren T, Ding GL, et al. A dynamic model for FLNG spiral wound heat exchanger with multiple phase-change streams based on moving boundary method[J]. Journal Of Natural Gas Science And Engineering, 2016,34:657-669.
[11] Wang SM, Jian GP, Wang JR, et al. Application of entransy-dissipation-based thermal resistance for performance optimization of spiral-wound heat exchanger[J]. International Journal of Heat and Mass Transfer, 2018, 116: 743-750.
[12] Ren Y, Jiang YQ, Cai WH, et al. Numerical study on shell-side saturated boiling heat transfer in spiral wound heat exchanger[J]. Applied Thermal Engineering, 2018,140: 657-670.
[13] Ren Y, Cai WH, Chen J, et al. Numerical study on the shell-side flow and heat transfer of superheated vapor flow in spiral wound heat exchanger under rolling working conditions[J]. International Journal of Heat and Mass Transfer, 2018, 121: 691-702.
[14] Wu JX, Liu SL, Wang MQ. Process calculation method and optimization of the spiral-wound heat exchanger with bilateral phase change[J]. Applied Thermal Engineering, 2018, 134: 360-368.
[15] Wang SM, Jian GP, Xiao J, et al. Optimization investigation on configuration parameters of spiral-wound heat exchanger using Genetic Aggregation response surface and Multi-Objective Genetic Algorithm[J]. Applied Thermal Engineering, 2017, 119: 603-609.
[16] Z.Y. Wu WHC, G.D. Qiu, Y.Q. Jiang Prediction of mass transfer time relaxation parameter for boiling simulation on the shell-side of LNG spiral wound heat exchanger[J]. Adv Mech Eng, 2014:1-11.
[17] C. Ding HTH, G.L. Ding, J. Chen, X.G. Mi, S.C. Yu, J.R. Li. Experimental investigation on downward flow boiling heat transfer characteristics of propane in shell side of LNG spiral wound heat exchanger[J]. Int J Refrig 2017,84:13-25.
[18] C. Ding HTH, G.L. Ding, J. Chen, X.G. Mi, S.C. Yu. Influences of tube pitches on heat transfer and pressure drop characteristics of two-phase propane flow boiling in shell side of LNG spiral wound heat exchanger[J]. Applied Thermal Engineering, 2018,131:270-283.
