华中科技大学学报（自然科学版）2016，Vol.44Issue(8)：6-10,5.DOI:10.13245/j.hust.160802
基于CFD与ε-NTU法的工程车辆散热性能预估
Forecast calculation of heat exchange capacity in construction vehicles based on CFD andε-NTU
摘要
Abstract
In order to improve efficiency of system match and design and acknowledge heat exchange capacity in construction vehicles ,an elementary unit of radiator was built to be simulated using CFD (computational fluid dynamics) numerical method ,and performance curves were fitted based on the data extracted from the simulation .Pressure loss data of the radiator was converted into parameters in three‐dimensional model for further acquiring entrance coefficient of the engine cabin .The ε‐NTU model was solved with the needed data to obtain the practical heat capacity in engine cabin .Two kinds of widely used construction vehicles were selected to demonstrate the forecast calculation ,after com‐paring between calculation results ,three dimensional simulation results and experiment data .It is found that the maximum temperature error is 7 .89% w hich appears in CAC (charge air cooler ) ,and the mean error of other thermal medium is 2 .29% .The discrepancy is acceptable .Computational ac‐curacy of this calculation is lower ,however ,it has many advantages such as short period and excellent expansibility ,and it is relatively simply and more practical ,w hich can be used to predict actual heat exchange performance and system selection .关键词
工程车辆/散热性能/CFD分析/数值模拟/预估方法Key words
construction vehicle/heat exchange capacity/CFD analysis/numerical simulation/fore-cast calculation分类
交通工程引用本文复制引用
刘佳鑫,蒋炎坤,秦四成,刘成强..基于CFD与ε-NTU法的工程车辆散热性能预估[J].华中科技大学学报（自然科学版）,2016,44(8):6-10,5.基金项目
国家科技支撑计划资助项目（2013BAF07B04）；江苏省科技支撑计划（工业）资助项目（BE2012041）；内燃机燃烧学国家重点实验室开放研究资助项目（K2012-08）． （）
