【摘 要】
：
Currently,in the world wide industry,the most popular fin design of automotive heat exchangers is the louver type.However,its noticed in the industry that t
【机 构】
：
Changan Automobile Global R&D Center
论文部分内容阅读
Currently,in the world wide industry,the most popular fin design of automotive heat exchangers is the louver type.However,its noticed in the industry that the fundamental researches of the fins on airside is pretty rear due to the difficulties of the tiny structures.This paper aims at employing Computational Fluid Dynamics(CFD)methodology to reveal the airflow characteristics of the louver fins and try to find connections to the macro performance of the coils.Based on 1:1 scale of 10 louver fins as a group in detailed geometry,to represent an overall heat exchanger,conduct simulation to explore the airside key heat transfer characteristics of the fins,including heat transfer flux,airside pressure drop,Reynolds number distribution at different louver angles etc.The findings have been validated with the tested data.Illustrations of the airflow pattern through the fins and louvers have been presented and an animation video of the air stream flow has also been created for tutorial purpose.
其他文献
本文运用CFD方法对整车空调风量进行预测，包括整车模型和分离式模型两种方法，其中详细描述了分离式模型预测整车空调系统风量的过程和原理。通过与试验对比，整车风量仿真值
多晶型现象在药物结晶生产过程中普遍存在,不同晶型产品理化性质的差异导致临床药效的显著差别。对药物多晶型行为的深入研究,可以为工业中稳定生产目标晶型产品提供理论依据。螺内酯是一种低效利尿剂,具有两种晶型和多种溶剂化合物。本文以螺内酯作为模型药物,开展关于溶剂化合物脱溶剂机理、伴随结晶现象以及相转化行为的研究。本文制备得到螺内酯晶型I、晶型II、乙醇溶剂化合物和水合物,并采用X-射线衍射仪、偏光显微镜
柴油机作为汽车动力之一已经被广泛应用,而由此引起的尾气排放问题也日益严重。稀薄燃烧型柴油机解决了CO和CH化合物的排放,其尾气主要的污染成分是碳颗粒和NOx。由于两者的
本文主要以某款车型为例，应用STAR CCM+软件，使用新的边界条件，对乘员舱降温过程进行了温度场的仿真模拟分析，并将分析结果与试验结果进行对比，两者误差在1℃以内。
通过介绍一种用于轿车发动机舱雨雪进入问题的仿真方法，模拟某轿车前方雨雪迹线，判断是否有雨雪粒子进入轿车进气口。通过综合考虑行车工况和雨雪粒子参数的影响，确定影响进
采用AVL Fire软件对某发动机缸内三维动态燃烧进行计算.对喷油器进行喷雾高速摄影试验,获得喷雾油束的扩展过程,进而提供准确的燃烧喷雾模型.缸内燃烧计算压力、温度曲线和燃
Static shift performance evaluation index and optimization measures for manual transmission in passenger car were analyzed.The objective evaluation applied
本文主要模拟用户对杂物箱的使用习惯。在杂物箱负载的情况下，长时间行驶过程中，对杂物箱逐渐外暴的问题进行初步研究，提高用户对杂物箱的感知质量。
Moldflow分析软件可在产品设计阶段进行成型可行性分析，通过对产品成型工艺、浇口设置、外观状态及翘曲变形等进行分析，评估并优化产品设计。同时，可以指导模具设计及工艺优
Dynamic simulation of vehicle model in time domain with nonlinearity draws more and more attention in the world.The difficulty often results from nonlineari