某商用客车动力舱热状态的仿真及试验研究  

Simulation and experimental study on thermal state of engine compartment of commercial vehicle

作　　者：叶晓[1] 傅佳宏[1] 张宇[1] 刘震涛[1] 

机构地区：[1]浙江大学动力机械及车辆工程研究所,浙江杭州310027

出　　处：《机电工程》2013年第5期530-535,共6页Journal of Mechanical & Electrical Engineering

摘　　要：为了研究商用客车动力舱的流场及温度场分布情况,利用FLUENT软件建立了某商用客车动力舱的三维仿真模型,在发动机热平衡试验台架上获得了该动力舱在外特性工况下的能量分布,并从车载试验中获得了其冷却模块流动特性曲线,并将它们作为计算模型的边界条件,将仿真结果与道路试验数据进行了对比分析。研究结果表明,动力舱内冷却气流的最高温度区域均匀分布在发动机体上方的机舱内,主要是由于冷却模块和发动机舱平行布置且有隔板隔离,冷却风道呈U形;风道的隔离布置使动力舱的冷却风热回流得到了有效控制。Aiming at the flow and temperature distribution,a 3D simulation model of the engine compartment of a commercial vehicle was established in FLUENT.The energy distribution under the full load condition and the curve of cooling module’s flow characteristics,which were obtained separately through engine thermal balance test and vehicle road test,were used as the boundary conditions for simulation model.The simulation results verified by the vehicle road test indicate that the highest temperature of the cooling wind flow occurred at the top of the engine,mainly for the reason that the cooling module and the engine compartment are arranged in parallel and isolated by clapboard,and the shape of cooling wind tunnel is U.The results also indicate that the heat reflux of cooling wind could be controlled effectively because of the wind tunnel’s isolation layout.

关 键 词：商用客车 动力舱 流场 温度场 三维仿真 FLUENT 

分 类 号：U469.1[机械工程—车辆工程] TP391.9[交通运输工程—载运工具运用工程]