作　　者： ;

机构地区： 广东工业大学

出　　处： 《汽车技术》 2019年第9期35-41,共7页

摘　　要： 针对汽车散热器在实车环境中内、外流场不均匀对散热性能影响无法判断的问题,提出采用场协同原理分析对流散热结果。首先建立发动机舱前端冷却模块模型,结合已有的经验公式和数值仿真方法对模型进行简化;其次运用多尺度耦合分析散热器在内部热介质流场和外部冷介质流场下的流动传热特性,并通过试验对仿真模型进行验证;最后利用场协同原理分析散热器散热特性,并提出内流场优化思路。优化结果表明,在散热器最为严苛的工况下,散热管表面温度标准差提高了29.01%,出水温度降低了1.32℃。 For the situation that the influences of the uneven flow field inside and outside the vehicle radiator on the heat dissipation performance can't be judged,the field synergy principle is proposed to analyze the convection heat dissipation result.Firstly,the engine front-end cooling module model is established,which is simplified with the existing empirical formula and numerical simulation methods.Secondly,the multi-scale coupling is used to analyze the flow and heat transfer characteristics of the radiator in the internal heat medium flow field and the external cold medium flow field.The simulation model is verified by experiments.Finally,the heat dissipation characteristics of the radiator are analyzed by the field synergy principle,and the internal flow field optimization idea is proposed.The optimization results show that,under the most severe conditions of the radiator,the standard deviation of the surface temperature of the heat pipe is increased by 29.01%,and the temperature of the water is reduced by 1.32℃.

关 键 词： 散热器 散热特性 场协同原理 多尺度耦合

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