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-----2013?

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1?1mmH2O= 9.807Pa

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6??????????? ????????? ??? ?

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20????????????????????

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30.???????????????? (?)

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???(1)?????????2??????????3?????????????????????????????????????13600kg/m3?

???14??????????????????k?1.4?????R?287J/kg?K?????????????????d1?400mm??????p1?140kN/m2????T1?180C?????d2?150mm?p2?116kN/m2???????????????????????????

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pz?45.53kN

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222p2?p1??(v1?v2)?290.8(KN/m)Fx=2(P2A2+?Q2V2)cos?-P1A1-?QV1=-1240(kN)??

FY=2(P2A2+?Q2V2)sin??1750(KN)??

?.?14????????L?50m???D?0.21m????????????????????????????????????d?0.2mm???l?6m? ?????Q?0.064m3/s????????????1??2?6.0???????????3?0.3?????????????????0.02????????????????????????1??????????????h??2????????Hs?2m????????????? lv12

h?(?1??)d2g ??

v1?4Q4Q??1.85m/s22?d1?D

h?1.88m h?1.88m

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0??Hs?(???????)?gd2g

v=4Q?2.04m/s?d2

pv?36.04kpa

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??????????????????????????13600kg/m3?. ?????????

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64

Re

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vdRe????

??0.025?7.91?105

316

???14??????????????????k?1.4?????R?287J/kg?K?????????????????d1?400mm??????p1?140kN/m2????T1?180C?????d2?150mm?p2?116kN/m2??????????????????????????? ??

T1?273?18?291k

p1140?103

?1???1.676kg/m3

RT1287?291

p2116?1??1()?1.676?()?1.465kg/m3

p1140

kp1v12kp2v22???k?1?12k?1?22

1.4140?103v121.4116?103v22?????1.4?11.67621.4?11.4652

???30459.32+v12?v22

???v1?21.618m/s,v2?175.862m/s

G??2v2A2?1.465?175.862?

?4?0.152?4.927kg/s


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