基于Fluent的进气歧管空气动力学仿真

1、1 仿真条件本课程报告使用Fluent对一进气歧管进行空气动力学仿真。该进气歧管的入口面积为5026.55mm2，单个出口面积为2552.67mm2，如图所示。根据四冲程6缸发动机的工作循环表，将进气压力分成36种工况。曲轴转角（deg）第一缸第二缸第三缸第四缸第五缸第六缸0-1800-60进气压缩作功进气排气作功60-120排气压缩120-180作功进气180-360180-240压缩排气240-300进气作功300-360排气压缩360-540360-420作功进气420-480压缩排气480-540进气作功540-720540-600排气压缩600-660作功进气660-720压缩排气序

2、号曲轴转角（deg）进气道末端的压力值（pa）第一缸第二缸第三缸第四缸第五缸第六缸1206800085000240100000850003608800085000480720005100660006120600007140850006800081608500010000091808500088000102007200011220660001224060000132606800085000142801000008500015300880008500016320720001734066000183606000019380850006800020400850001000002142085000880

3、00224407200023460660002448060000255006800085000265201000008500027540880008500028560720002958066000306006000031620850006800032640850001000003366085000880003468072000357006600036720600002 仿真步骤基于以上条件对进气歧管进行空气动力学仿真。讲进气歧管模型导入到Gambit中。建立实体，进行布尔操作。获得进气歧管内的空间模型。对模型进行边角优化处理边角优化后的结果优化后对模型划分网格划分网格数165万设置边界条 件将

4、模型以mesh格式导出在fluent中导入mesh模型检查网格并定义长度单位检查网格显示网格设置求解器使用湍流模型边界条件设置求解初始化设置监视器求解计算求解完成绘制速度矢量绘制压力分布图统计质量流量3 结果统计进气歧管入口流量序号曲轴转角（deg）入口序号曲轴转角（deg）入口质量流体积流质量流体积流kg/sm3/skg/sm3/s1200.890.7266193800.86450.70572400.44520.3635204000.40490.33063600.69210.565214200.6880.56164800.50410.4115224400.52280.426751000.55

5、310.4516234600.57380.468461200.59820.4883244800.62080.506871400.88440.7219255000.88930.72681600.46170.3769265200.38720.316191800.69490.5672275400.69330.566102000.52080.4252285600.51550.4208112200.57010.4654295800.56610.4621122400.61880.5051306000.61270.5001132600.87550.7147316200.88170.7198142800.36

6、50.298326400.43360.3539153000.68690.5607336600.69810.5699163200.52180.426346800.51970.4243173400.57370.4683357000.57170.4667183600.62140.5072367200.620.506进气歧管出口流量，详细数据请看附件序号曲轴转角（deg）第一缸质量流体积流kg/sm3/s1200.511450.41752400.05890.0483600.31280.25544800.50410.411551000.55310.451661200.59820.488371400.33

7、850.276381600.36710.299791800.35210.2874序号曲轴转角（deg）第二缸质量流体积流kg/sm3/s255000.52440.428126520-0.0002-0.0001275400.31760.2592285600.51550.4208295800.56610.4621306000.61270.5001316200.34050.278326400.37540.3064336600.36280.2962序号曲轴转角（deg）第三缸质量流体积流kg/sm3/s132600.5240.427714280-0.0176-0.0143153000.31930.26

8、06163200.52180.426173400.57370.4683183600.62140.5072193800.32610.2662204000.37930.3096214200.35730.2917序号曲轴转角（deg）第四缸质量流体积流kg/sm3/s316200.54120.4418326400.0580.0475336600.33530.2737346800.51970.4243357000.57170.4667367200.620.5061200.378640.3092400.38630.31543600.37930.31序号曲轴转角（deg）第五缸质量流体积流kg/sm3/s71400.54590.445681600.09470.077291800.34280.2798102000.52080.4252112200.57010.4654122400.61880.5051132600.35160.287142800.38260.3124153000.36760.3001序号曲轴转角（deg）第六缸质量流体积流kg/sm3/s3803800.53840.4395400400