基于Fluent的進氣歧管空氣動力學(xué)仿真

1、1 仿真條件本課程報告使用Fluent對一進氣歧管進行空氣動力學(xué)仿真。該進氣歧管的入口面積為5026.55mm2，單個出口面積為2552.67mm2，如圖所示。根據(jù)四沖程6缸發(fā)動機的工作循環(huán)表，將進氣壓力分成36種工況。曲軸轉(zhuǎn)角（deg）第一缸第二缸第三缸第四缸第五缸第六缸0-1800-60進氣壓縮作功進氣排氣作功60-120排氣壓縮120-180作功進氣180-360180-240壓縮排氣240-300進氣作功300-360排氣壓縮360-540360-420作功進氣420-480壓縮排氣480-540進氣作功540-720540-600排氣壓縮600-660作功進氣660-720壓縮排氣序

2、號曲軸轉(zhuǎn)角（deg）進氣道末端的壓力值（pa）第一缸第二缸第三缸第四缸第五缸第六缸1206800085000240100000850003608800085000480720005100660006120600007140850006800081608500010000091808500088000102007200011220660001224060000132606800085000142801000008500015300880008500016320720001734066000183606000019380850006800020400850001000002142085000880

3、00224407200023460660002448060000255006800085000265201000008500027540880008500028560720002958066000306006000031620850006800032640850001000003366085000880003468072000357006600036720600002 仿真步驟基于以上條件對進氣歧管進行空氣動力學(xué)仿真。講進氣歧管模型導(dǎo)入到Gambit中。建立實體，進行布爾操作。獲得進氣歧管內(nèi)的空間模型。對模型進行邊角優(yōu)化處理邊角優(yōu)化后的結(jié)果優(yōu)化后對模型劃分網(wǎng)格劃分網(wǎng)格數(shù)165萬設(shè)置邊界條 件將

4、模型以mesh格式導(dǎo)出在fluent中導(dǎo)入mesh模型檢查網(wǎng)格并定義長度單位檢查網(wǎng)格顯示網(wǎng)格設(shè)置求解器使用湍流模型邊界條件設(shè)置求解初始化設(shè)置監(jiān)視器求解計算求解完成繪制速度矢量繪制壓力分布圖統(tǒng)計質(zhì)量流量3 結(jié)果統(tǒng)計進氣歧管入口流量序號曲軸轉(zhuǎn)角（deg）入口序號曲軸轉(zhuǎn)角（deg）入口質(zhì)量流體積流質(zhì)量流體積流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進氣歧管出口流量，詳細(xì)數(shù)據(jù)請看附件序號曲軸轉(zhuǎn)角（deg）第一缸質(zhì)量流體積流kg/sm3/s1200.511450.41752400.05890.0483600.31280.25544800.50410.411551000.55310.451661200.59820.488371400.33

7、850.276381600.36710.299791800.35210.2874序號曲軸轉(zhuǎn)角（deg）第二缸質(zhì)量流體積流kg/sm3/s255000.52440.428126520-0.0002-0.0001275400.31760.2592285600.51550.4208295800.56610.4621306000.61270.5001316200.34050.278326400.37540.3064336600.36280.2962序號曲軸轉(zhuǎn)角（deg）第三缸質(zhì)量流體積流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序號曲軸轉(zhuǎn)角（deg）第四缸質(zhì)量流體積流kg/sm3/s316200.54120.4418326400.0580.0475336600.33530.2737346800.51970.4243357000.57170.4667367200.620.5061200.378640.3092400.38630.31543600.37930.31序號曲軸轉(zhuǎn)角（deg）第五缸質(zhì)量流體積流kg/sm3/s71400.54590.445681600.09470.077291800.34280.2798102000.52080.4252112200.57010.4654122400.61880.5051132600.35160.287142800.38260.3124153000.36760.3001序號曲軸轉(zhuǎn)角（deg）第六缸質(zhì)量流體積流kg/sm3/s3803800.53840.4395400400