一、填充1、流体是由连续质点组成的2、拉格朗日,欧拉3、无径向脉动,有径向脉动2000,4000,,0.5,0.8rl221PPrl221PP2max)(1RruunRruu1maxRe64)(Re,df)(df,无关,有关4、,5、流体的黏性所造成的剪应力,总势能的降低6、=7、↑,↓↑,↓↓,↓8、56,5.711613219、=,,=10、611、11二、选择1、(A)2、(B)3、(D)三、计算1、(1)以容器C液面为势能基准面:gRiBA)(PPgHiCB)(PP)()(HRgiCAPPmzzAC1,0aAACApgzpPP21/8.27271)()()(mNgzHRgpppAiaA表压(2)gzHRgpAi)'()()(21表压mggzpHRiA521.0)()(2)'(1表压2、(1)∴设为层流在截面1-2间列机械能衡算式:解得:检验假设正确spa31030gRRggdluHgudlHHifABf)()(3222122smu/536.02000852Redu(2)阀门关小:,,,3、在截面1-B间列机械能衡算式:fABH)(21RRBAPP1R2RfBBahgzpgzp1)()()(11表BBBBafpzzgzzgpphCBCBOCCBOCuuddu64.022代入机械能衡算式:CBCBCBCBOCOCOCfCBfOCfuudludlhhh22216.1122332101081.981.9916.11CBusmuCB/65.2smuuCBOC/70.164.0smudduOCOOCO/80.622(2)对结点C有:在截面1-B间列机械能衡算式:pCuOO2akpp15.60CDCDCBCBOCOCdududu222444CDCBuuCBOCuu28.1)()(1表BBfpzzgh)()(22122表BBCBCBCBOCOCOCpzzgudludl在截面1-D间列机械能衡算式:smuCB/68.1smuOC/15.2fCBDahupgzp221222)(2221CDCDCDOCOCOCCBDudludlupgz表aDkpp03.38)(表