中国电机工程学报2026，Vol.46Issue(12)：5047-5056,中插18,11.DOI:10.13334/j.0258-8013.pcsee.250814
超临界传热主导无量纲数组发现及关联式构建
Discovery of Dominant Dimensionless Group and Correlation Development for Supercritical Heat Transfer
摘要
Abstract
Accurate and highly generalizable heat transfer correlations are essential for the optimal design of supercritical heat exchangers and the efficient and safe operation of thermal systems.However,an extensive evaluation based on experimental datasets of water,carbon dioxide(CO2),and R134a flowing in horizontal tubes reveals that existing correlations exhibit significant errors in cross-fluid predictions and fail to capture the common heat transfer characteristics among different supercritical fluids.To improve prediction performance,this study employs a data-driven approach combining the Buckingham Pi theorem and the active subspace method to identify the dominant dimensionless group governing supercritical heat transfer in horizontal tubes.The normalized eigenvalue of the identified dimensionless group reach 0.997,effectively capturing the key characteristics of supercritical heat transfer.Based on the dominant dimensionless group,a new heat transfer correlation is developed,demonstrating excellent cross-fluid predictive capability.For water,carbon dioxide,and R134a,the new correlation achieves a mean absolute relative error of 0.05,with 98.67％of data points having relative errors within 20％.Furthermore,validation using R1234yf demonstrates superior generalization capability compared to existing models.These findings indicate that the identified dominant dimensionless group effectively captures the shared heat transfer behavior of various supercritical fluids,offering a new perspective for developing universally applicable supercritical heat transfer correlations.关键词
换热器/传热关联式/超临界流体/主导无量纲数组Key words
heat exchangers/heat transfer correlation/supercritical fluids/dominant dimensionless group分类
信息技术与安全科学引用本文复制引用
侯正辉,杨旷,廖海帆,白少喆,王海军..超临界传热主导无量纲数组发现及关联式构建[J].中国电机工程学报,2026,46(12):5047-5056,中插18,11.基金项目
国家重点研发计划项目(2023YFB4102205) （2023YFB4102205）
陕西省科技创新团队计划(2023-CX-TD-18) （2023-CX-TD-18）
中核集团领创科研项目(J202309019).National Key R&D Program of China(2023YFB4102205) （J202309019）
Innovation Capability Support Program of Shaanxi Province(2023-CX-TD-18) （2023-CX-TD-18）
Innovative Scientific Program of CNNC(J202309019). （J202309019）
