西华大学学报（自然科学版）2025，Vol.44Issue(4)：73-83,11.DOI:10.12198/j.issn.1673-159X.5358
基于CFD的摩托车散热器数值模拟及优化
Numerical Simulation and Optimization of Motorcycle Radiator Based on Computational Fluid Dynamics
摘要
Abstract
To ensure that the coolant inlet temperature of the motorcycle radiator is within a control-lable range,a motorcycle cooling system was taken as the research object.Basic experimental parameters of the cooling system were collected through component flow resistance testing,water pump performance test-ing,engine thermal balance testing,and radiator heat transfer performance testing,providing boundary in-puts for flow rate analysis of the cooling system and radiator coolant inlet temperature analysis.The analys-is results show that through the match analysis of pump performance curve and cooling system flow resist-ance curve,the working flow rate of the water pump is 23.5 L/min when the engine speed is 9000 r/min.The series connection of flow meter and testing fixture in engine thermal balance test causes a slight in-crease in system resistance,and the cooling system flow rate is 22.5 L/min.The maximum operating power of the engine at a speed of 9000 r/min is 14 kW,with a heating power of approximately 7.1 kW.The simu-lated inlet coolant temperature of the radiator is 109℃,which does not meet the coolant temperature con-trol target of less than 100℃.By optimizing the volute guide,air outlet,and increasing the height of the impeller by 6 mm and the width of the impeller by 5 mm,the inlet air volume of the radiator was increased from 126.7 g/s to 188.5 g/s,and the air velocity of the radiator core was increased from 6.1 m/s to 9.28 m/s.The improvement effect of air volume and air velocity was significant.After optimization,the inlet coolant temperature of the radiator is 96℃.The results of the vehicle thermal balance test show that the radiator in-let balance temperature,cylinder temperature,and oil temperature of the optimized design under the highest vehicle speed condition are 98,149 and 114℃,respectively.Compared with the initial design,the temper-atures are reduced by 13,18 and 13℃,which verifies the effectiveness of the optimized design.The re-search results can provide theoretical guidance for evaluating the heat dissipation performance of the vehicle cooling system and optimizing of coolant temperature.关键词
摩托车散热器/冷却系统/进风量/热平衡测试/工作流量Key words
motorcycle radiator/cooling system/air intake volume/thermal balance test/working flowrate分类
机械工程引用本文复制引用
谭礼斌,袁越锦..基于CFD的摩托车散热器数值模拟及优化[J].西华大学学报（自然科学版）,2025,44(4):73-83,11.基金项目
国家自然科学基金项目(51876109) （51876109）
四川轻化工大学人才引进项目(2025RCZ068). （2025RCZ068）
