彭斌,孙振豪,朱兵国,施佳宝,张朋成

• 1:兰州理工大学机电工程学院

摘要(Abstract)：

建立了不同半圆通道的数学和物理模型，并通过与实验数据的比较，验证了所建立模型的准确性。研究了超临界二氧化碳（S-CO_2）在等截面半圆通道、渐扩型和渐缩型通道内的热工水力换热性能，并分析了不同通道和压力对S-CO_2在变截面半圆通道内的热工水力性能的影响。结果表明：相较于均匀截面半圆通道，渐扩型通道恶化传热，渐缩型通道强化传热；入口和出口半径比为1.0:0.5的渐缩型半圆通道的总体换热系数最大提升了39.93%，流动传热综合性能评价因子PEC最大为1.346；当压力越靠近临界压力或热通量较低时，传热性能越高。最后，从场协同性和湍动能分布的角度解释了渐缩型变截面通道强化传热的原因。研究结果可为S-CO_2循环系统冷却器的设计与优化提供新的思路和理论指导。

关键词(KeyWords)： 超临界二氧化碳;渐扩型通道;渐缩型通道;传热强化;湍流;场协同

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（51966009）;; 甘肃省自然科学基金项目（22JR5RA283）;; 甘肃省优秀博士生项目（22JR5RA235） ~~

作者(Author): 彭斌,孙振豪,朱兵国,施佳宝,张朋成

DOI: 10.19666/j.rlfd.202310165

参考文献(References)：

• [1]XU J L,LIU C,SUN E H,et al.Perspective of S-CO2power cycles[J].Energy,2019,186:115831.
• [2]吴柯,鲍中凯,段伦博,等.燃煤s CO2布雷顿循环及其工质传热特性研究进展[J].洁净煤技术,2020,26(1):9-21.WU Ke,BAO Zhongkai,DUAN Lunbo,et al.Research progress on supercritical CO2 Brayton cycle and its working fluid heat transfer characteristics for coal-fired power generation[J].Clean Coal Technology,2020,26(1):9-21.
• [3]尹少军,闫晨帅,徐进良,等.水平管内超临界CO2冷却传热特性数值分析[J].中国电机工程学报,2021,41(增刊1):247-253.YIN Shaojun,YAN Chenshuai,XU Jinliang,et al.Numerical analysis on heat transfer characteristics of supercritical CO2 cooled in a horizontal tube[J].Proceedings of the CSEE,2021,41(Suppl.1):247-253.
• [4]闫晨帅,徐进良.超临界压力CO2在水平圆管内流动传热数值分析[J].物理学报,2020,69(4):136-145.YAN Chenshuai,XU Jinliang.Numerical analysis on flow and heat transfer of supercritical CO2 in horizontal tube[J].Acta Physica Sinica,2020,69(4):136-145.
• [5]崔海亭,黄夏洁,张欣悦,等.直管套管内超临界二氧化碳热力性能研究[J].河北科技大学学报,2021,42(4):424-430.CUI Haiting,HUANG Xiajie,ZHANG Xinyue,et al.Research of thermal performance of supercritical carbon dioxide in straight pipe casing[J].Journal of Hebei University of Science and Technology,2021,42(4):424-430.
• [6]庄晓如,徐心海,杨智,等.高温吸热管内超临界CO2传热特性的数值模拟[J].物理学报,2021,70(3):176-188.ZHUANG Xiaoru,XU Xinhai,YANG Zhi,et al.Numerical investigation on heat transfer of supercritical CO2 in solar receiver tube in high temperature region[J].Acta Physica Sinica,2021,70(3):176-188.
• [7]张海松,朱鑫杰,朱兵国,等.浮升力和流动加速对超临界CO2管内流动传热影响[J].物理学报,2020,69(6):126-135.ZHANG Haisong,ZHU Xinjie,ZHU Bingguo,et al.Effects of buoyancy and acceleration on heat transfer of supercritical CO2 flowing in tubes[J].Acta Physica Sinica,2020,69(6):126-135.
• [8]吴楠楠,韩楚君,王佳乐.印刷电路板式换热器的研究综述及应用[J].辽宁化工,2023,52(2):289-291.WU Nannan,HAN Chujun,WANG Jiale.Research review and application of printed circuit heat exchanger[J].Liaoning Chemical Industry,2023,52(2):289-291.
• [9]李洪,任燕,章立新,等.板式扩散焊矩形微通道换热器中S-CO2流动与传热特性的数值模拟[J].动力工程学报,2022,42(12):1174-1182.LI Hong,REN Yan,ZHANG Lixin,et al.Numerical simulation of flow and heat transfer characteristics of S-CO2 in plate diffusion welded rectangular micro-channel heat exchanger[J].Journal of Chinese Society of Power Engineering,2022,42(12):1174-1182.
• [10]WANG H,WANG S,ZANG J,et al.Direct numerical simulation of the turbulent flow and heat transfer of supercritical CO2 in a semicircular pipe[J].International Journal of Heat and Mass Transfer,2021,168:120882.
• [11]PARK J H,KWON J G,KIM M H,et al.Experimental investigation of buoyancy effects on local heat transfer of supercritical pressure CO2 in horizontal semicircular tube[J].International Journal of Heat and Mass Transfer,2021,164:120496.
• [12]ZHONG S,REN Y,WU W,et al.Numerical study on the local heat transfer characteristic of supercritical CO2 in semicircular/circular channel under cooling condition[J].International Journal of Heat and Mass Transfer,2023,209:124098.
• [13]KRUIZENGA A,LI H,ANDERSON M,et al.Supercritical carbon dioxide heat transfer in horizontal semicircular channels[J].Journal of Heat Transfer,2012,134:081802.
• [14]徐婷婷.S-CO2 Z型印刷电路板式换热器的流动和传热性能分析及结构改进研究[D].济南:山东大学,2023:1.XU Tingting.Flow and heat transfer performance analysis and structural improvement of S-CO2 Z type printed circuit heat exchanger[D].Jinan:Shandong University,2023:1.
• [15]ANEESH A M,SHARMA A,SRIVASTAVA A,et al.Effects of wavy channel configurations on thermalhydraulic characteristics of printed circuit heat exchanger(PCHE)[J].International Journal of Heat and Mass Transfer,2018,118:304-315.
• [16]刘晓凯,成克用,淮秀兰.翼型通道换热器在燃机系统中流动换热性能的数值研究[J].中国电机工程学报,2023,43(18):7160-7173.LIU Xiaokai,CHENG Keyong,HUAI Xiulan.Numerical study on flow and heat transfer performance of airfoil channel heat exchanger in gas turbine system[J].Proceedings of the CSEE,2023,43(18):7160-7173.
• [17]杨光,邵卫卫.印刷电路板换热器结构及传热关联式研究进展[J].化工进展,2021,40(增刊1):13-26.YANG Guang,SHAO Weiwei.Review of optimization and heat transfer correlations of printed circuit heat exchanger[J].Chemical Industry and Engineering Progress,2021,40(Suppl.1):13-26.
• [18]HUANG C,CAI W,WANG Y,et al.Review on the characteristics of flow and heat transfer in printed circuit heat exchangers[J].Applied Thermal Engineering,2019,153:190-205.
• [19]LIU G,HUANG Y,WANG J,et al.A review on the thermal-hydraulic performance and optimization of printed circuit heat exchangers for supercritical CO2 in advanced nuclear power systems[J].Renewable and Sustainable Energy Reviews,2023,133:110290.
• [20]LI C,HAO J,WANG X,et al.Dual-effect evaluation of heat transfer deterioration of supercritical carbon dioxide in variable cross-section horizontal tubes under heating conditions[J].International Journal of Heat and Mass Transfer,2022,183:122103.
• [21]BAI C,QIU Y,LENG X L,et al.Diverging/converging small channel for condensation heat transfer enhancement under different gravity conditions[J].International Communications in Heat and Mass Transfer,2020,116:104714.
• [22]KUMAR N,BASU D N.Role of buoyancy on the thermal hydraulic behavior of supercritical carbon dioxide flow through horizontal heated mini channel[J].International Journal of Thermal Sciences,2021,168:107051.
• [23]WANG H,LEUNG L K H,WANG W,et al.A review on recent heat transfer studies to supercritical pressure water in channels[J].Applied Thermal Engineering,2018,142:573-596.
• [24]闫晨帅,朱兵国,张海松,等.超临界压力CO2在倾斜光管内传热特性数值分析[J].中国电机工程学报,2020,40(2):583-592.YAN Chenshuai,ZHU Bingguo,ZHANG Haisong,et al.Numerical analysis on heat transfer characteristics of supercritical pressure CO2 in inclined smooth tube[J].Proceedings of the CSEE,2020,40(2):583-592.
• [25]DANG C B,HIHARA E.In-tube cooling heat transfer of supercritical carbon dioxide.Part 1.Experimental measurement[J].International Journal of Refrigeration,2004,27(7):736-747.
• [26]LAU K T,KHAN S A,EZE C,et al.Numerical investigation on deteriorated heat transfer of supercritical water flowing upward in tubes with variable cross-sectional geometries[J].International Communications in Heat and Mass Transfer,2022,136:106203.
• [27]WANG W,ZHANG Y,LEE K S,et al.Optimal design of a double pipe heat exchanger based on the outward helically corrugated tube[J].International Journal of Heat and Mass Transfer,2019,135:706-716.
• [28]过增元.换热器中的场协同原则及其应用[J].机械工程学报,2003(12):1-9.GUO Zengyuan.Principle of field coordination in heat exchangers and its applications[J].Journal of Mechanical Engineering,2003(12):1-9.