《水力学》吴持恭课后习题答案

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11+,P212gh2h2sinb1210009.822sin45127.74kN(ᵨgh2'h23sin23sin450.943m©+,ᜧªPP1P262.4127.7434.67kN7Bg«PlhlP2h2PhD62.411.41427.740.94334.67hD(ᜧppag[22g(rr0)z]22ᙠ⚔®⊤☢z0,¯+°Hppa12(rrO)222⚔®⊤☢±ᑮḄ?+°³p,F⊤☢±ᑮḄ³ᜧJ+°³pa,©Ḅ+,H´ᓽR0(ppa)2rdr122R0(rr0)2rdr022@ᑖFrr0212R,r02R22m2-16.¶·☢ABH¸ᙊ%&'PxgDb22211Pzg12Db443.141698102-17

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140.020.04710223m/s0.047L/S73……tv80.98vlv20.98vltv30.98vltqVd42(vl0.98vl0.98vl,0.98vl)27d42vlSnuYSnSvwYḄFxyᦪḄn⚗{஺ᵫA✌⚗a1=1,}xq=0.98,⚗ᦪn=8஺ASnal(lq)lq4qVl10.98810.987.4622Sn740.04710230.0017.46278.04m/sv80.98vl0.988.046.98m/s3-5.ᙠ᝞ᡠḄXY?☢ᔜᢥᱥuumax[l(rrO)]ᑖ?uYX⍝2Rr0=3cm,Xᨬᜧumax=0.15m/s,ijQm☢JᙳV஺

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182gpagpaghgv222g47.757m/s2g2hv22g2h29.80710000.151.29qVd4v23.140.247.75741.5m/s33-12.*+,-Ḅ."qV=2.5L/s,dl=50mm,d2=25mm,,/0⊤2ᦪ&9807Pa,4ᜮ6ᜫ8ᶍ:;<=>?ᦈAB☢ḄDEFᘤᑁᔾḄI$ho'()qVdl4

192d242v2vlv24qVdl4qV242.5103.140.0542.51032321.273m/s5.093m/sd2223.140.0250Plg22g02p2pav2g22gpJ(pap2)g22v2vl2g980722

20pap2v2v12ggPl5.0931.2732gg10009.8070.2398mH2Op2ghpahpap2g0.2398mH2O313.,KᔣM.."Q=36L/s,.Nv=30m/s,Oᚖ>M.QRKᔣḄ,SḄTᢱVW."Ql=12L/s,XYZM.ᐸ\]ᑖ_`:;M.ᙠ,SḄT0<M.Ḅ_`bcd,SḄeᵨ0஺g30஺h456.6kN'()iM.ᑖᡂklḄᙢK&nᑴpixQᔣq&rᔣiyQᔣ&rᔣᑡ,ᓽxKᔣḄu"KvDwxFqV2v2cosqVvOyKᔣḄu"Kvx0qV2v2sinqVlvlqV2v2sinqVlvlsin30qVlvlqV2v212v024v00.5:;y0z{Ḅ|}ᑭKvxpl2vC2nᑴpḄ.V☢Ḅ/>ᙢᜧ/pa,v0=vl=v2~F10002410~F'456.5NF456.5N330cos'100036103303-14.᝞*g*ᡠ+ᘂMᔣᐸbᡂ60஺Ḅᐝ,S஺4ᘂd=25mm,M."Q=33.4L/s,,<M.,SḄᑖ.."QIஹQ2cM.d,SḄeᵨ0FoᎷᜮ6ᜫD8ᶍ:;஺

21'()v0=vl=v2vO4Q433.4103.140.02532d268.076m/sxKᔣḄu"Kvx0QlvlQ2(v2)Qv0cos60QIQ2Qcos60QQ2Q20.5QQ20.25Q8.35L/sQIQQ20.75Q25.05L/syKᔣḄu"KvxF0Q(v0sin60)FQv0sin601969.12N3-15.*+ᐭᵫ=ឋKvxqVdl42vld242v21.02m/shv24qV41.83.141.02vl4qV41.83.141.52dl2d222.29m/s|}ᑭKvx0Pl

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23dl600mm,§⍝d2300mm,."qV0.425m/s,/pl140kPa,.d¨©¦ᜮḄeᵨ0:;6ᜫ஺'()(1)ᵨ=ឋKv;ªvA«vBvl4qV7idl240.425ᐔ0.621.5m/shv24Q7td2240.425ᐔ0..326.02m/s(2)ᵨ"Kv®;ªp2vl22g0.115mhv222g1.849m2vl2v22p2plg1409.81(0.1151.849)122.98kN/m2g2g(3)E.©1-2¯&◞±pi²³*+ᙶ᪗¶¦d.pḄeᵨ0RḄᑖ0&RX«RY,ᑡx«y·¤ᙶ᪗KᔣḄu"Kv®wP2Pl4d2cos45.FyQ(v2cos450)2

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