风管计算局部阻力系数.docx

1、风管计算局部阻力系数风管计算局部阻力系数8.3.2局部阻力系數管件/进风口的局部R1力系数/0. 05时.式中弟一管件的局部阻力来数.见上表9&格的局部阻力系数.见管件G-8。*2不安在熔墙上的锥形渐缩喇叭口w.当断面处有网格时，按式（8.32）进行修正。/-3安装在端增上的锥形渐缩喇叭口当断面处有网格时，应按式（83-2）修正。M-4罩形进风口若断面处有网格时.应按式183-2）进行修正。 A 5带成不带凸边的渐缩型罩子圆 形 罩02C4080100120140180sohOO.ll0/60.D90.140180.270.32(1.50矩 形 罩020406010(1120140160180

2、 :LO0.L90.13036t)2l0.270.330.450.530.62 :（或无对于矩形罩子.&系指大角。 骨件8 出风口的局部阻力系数87直管出风口瓷o 0当出口断面处有网格时，应按式（8.32） 进行修正。8-2像形出风口.圆风管W.So当断面处有网格时应按式（&3 2）修正矩形平面扩散出风口当断面处有网裕时.应按式（83 2）修正二B 4矩形锥形扩散岀风口（靠瑙或靠壇）当断面处有网格时应按式（83-2）修正B 5通过9（广弯头排至大气的出风口当出口处有网格时，应按式（乩3-2）进行修正。 K 6 不接风管.风机出口为不对称的扩散岀风口当断面处有网格时.应按式（83-2）修正B-7

3、不接风管.风机岀口为锥形扩散当断面处有网格时，应按式8.3-2）修正。B 8排气罩当断面处有网格时，应按式（82）修正。 管件Q弯头的局部阻力系数C-1 90圆形弯头上表为90驾头时的局部阻力系数.当弯头不是90时.则要乘上修正系数其值579w.见表8.3-1。C-2 3竝 iQI* Wk0*50?511.52.U5a 0.460330.240194w0.500.370270-24 ；1 5Q98O.Md420.31033C-3矩形凤管不带导叶的弧形弯头0.250.50,751.0hS2.03.04.35.060&0 i0.51.5l41.3).2hd1.01.1hlL21.20.7503?0

4、.5?0,0U40.400.39o.3g0.400.420.430.44 I1J)0Z70.250- 230.210190. L8XJ.190.200.2?l.2! 1U5J.Z?020D190.170.150.140.146 150.160.1?0. t72.00.2C0.1?0.160-16O.t40.130.130.140.140.15rfbkexO41Z368 i ,014 i 20 !0.51.401.261.1911.41.09l.Ofi1.041 1.0 ;】U 11R 7512.0U7?1.G41.5fi1.4L3B1.30f.isli.o &为當诺数Re20 x 104时的局

5、部阻力系数.当Re20x 104时，应按下式计算Rc按式（&3 4）计算C-4 30 Z形圆风管弯头L. i_10.51.0U52.02.5300.150L50】60.16110. E610.161Re按式（8.3-4计算，占仏修正值见衣83-2。C-5矩形风管带导流叶片光滑弯曲的弯头（1一个导流叶片Ri 二 RCR式中 r头的内半包.R导流叶片的弯曲半径.m：CR弯曲的比值，见下表$欣 见丧83-1。K/bribCRq jb0250.5L01.52.03.C4.05.06.07.08.00.050.5$0.2180.520.400.43Q.490150.160,170.180.190.2D0

6、2lC.Z50.750.U70】80.130.11C.lt0-110.120.130-140.140450.150.3C0 卸0.4800.15C.11o.(e0.090.090.09a io0.100.110.110.120.350.05Q.5M0.130.09o.os0.070.070.00.G80.080.080D90.090.400.900.5350.110.0S0.07D.W0.060-060.060.070-070.070.070.45 0950.F570.100.-070.06C.05O.OS.9.060.050.05O.lO.g0.060.501.000.5770.090.06

7、0.050.050.040.40.040.050.050.05.05 (2)两个导流叶片/o 二Ri =R/CRRi mRJCR 二 RKCRJ式中/22号导流叶片的弯曲半径，nu 其他符号说明同一个导流叶片。7R/b”bCk0.2S0.5l01.52.03.04.05.06.07.08.01).050.5S0.3620.260.200.220.250.280.330.370.41D.45048f0.51Q.100.6C0.00.170.130.110.120.130.150.160.170.190.200.210.150.650.50?0.12Or 090.030.08O.(J80.09Oe

8、LO0.100.110.11O.H0.200.700.S500.090.070.0S0*050.060 060.06o. 090070.070.070.250.750,5$ao060.04O.CM0g0.040.050.050.050.050.05C.300.8D0.6130.060.040.030.030.030.030.D30.030.04O.tMo(k0.$60.860.6380.05O.W0030.030.030030.030.030.030.1)30.03!0.400.659Q.G50.030.030.020.020*020.020.020.020.02o.w0U50.950.877

9、0.040.020应0.020020.020.020.020.020.020.020.50l.XI0.C9S0.030.020*020.020.020.010.010.010.010.010.01 (3 )三个导流叶片.Co = %日中 &3号导滋叶片的弯曲半径.m； R、= RzJCR - R XCR) 其他符号说明同二个导流叶片的解释；C-6矩形风管斜接弯头带单层导流叶片C 7矩形风件斜接弯头带双层寻流叶片立 Cm A1 -4a ac , ?编号V r rq5H)5120Lo山270.22.瓯1.26叱3彳叶軌母入1 口 齊32270.330-40.660.770.740. 730.721

10、029o.w0.590.760800.83040X3160.310.380.60O.WO.M088M.M0.8SJ20.C70】2叽230.290.270.270.27D2.40d5IM80.360.550.S90.590.570.572 f60.190.28Q.U0.900.700.710.711G9100200.240.430.760.800.81O.MI0.8】AL6U.210.280.520.76C.87S87U.S?IE20.0SC.07CJ2(1.27O6 xlO160.160-2S0U80.600.690.710.700.70!0C.21O33U.S20.60O.?60.830.

11、840,83160.210.340.560.72O.?90.850.8?0.88鼻i /In1620304560901勿1802M80.220.250.290.310.320.33D.30 ! aO.J55430.500.56o.w0.630.63Q.63 6(M20.47U580.680.720.760.76D.7S0U20.4Q0刊0.700.80U8?C.850貂:1 1必 1J A u弘144560ia)20.090.120,200.340.37S380.3540.160.250.420.600.68U7006660.199.300.40.650从側形变成矩形 _tan(/2) = (

12、1. 13拓正7-久)/2/(2)从矩形变到圆形“n(&/2 = (6 -113少。加)/2/D5风机出口接风管的平面对称扩散管P-4w.io1.52-02.53.03340100.050.070.09oao(1.11611150060.0911D.13QL30.14200.070.100.130.150I60.162S0館0.13C.1C0.190.210.23300.1|0.24C-2S0.3Z0.340.35S50.240.34Q.390.440.480.506风机出口接风管的平面不对弥扩散管火)1%A./ An1.52.025 3.03,54.0100.080.09(MOC.100L3

13、0.111).1115O.IO0.110.1201402200.120.J4Cui50.16U172So. 150440210.230.250 io* 、 . 0.050.05th 085.190.290.370.43E-2圆形风管和矩形风管的锥形渐缩管“之昴V| 1/D010203040601001401800.0250.500.470.450.430.41OUO0.420.450500.050.500450.410.360矽0.300.350.420.500.0750.500.420.50.300.260.230.300.400.50：0.100.500390.320.250.220.18

14、0.270.M0.500.150-500.370.270.200.160.160.250.370.S00.600.500.270.180.130.1)0.120.230.380.50血900.20.40.80.80.914CL00.850 翎0.500300.180E-2管件F三通的局部阻力系数F-1圖形风管Y形合流三通支 A it Zupi0.10.20.30U0.6081.00.4-0.56p 0.44-0.35-0.28-0.15-0.(M0.050.5-0鹄-0.37-0.28-0.217.090.020.110.6-0-38-0.27-0.19-0 1206100.180.7-0.2

15、6-0,16-0.M-0020.U50,120.230.320400.90-Q40130.210.2?0.370.460鬪1.002Z0.310.30.440.S300.6A1.51.41.S1.SU61.71.7132.03.13.23.2X23.3333,32.55.S5.35.3545.45.45.4308.1)8.08.081)8.08.08.0M1805()5un18I7t3帖00000000050.89265140-0.0.0.S0.C5 九0.0.F-W.F-2 圆风管锥形合流三通支通遭fl：3厶At0.203.8667.gxJ1(U37.81.20.12IA】爲2. 63.23

16、.71.2UtX0.21.20.932.85.9人2K.4951103 1*S0270.81E72.43.03619O4-U8-0.720M5661.)1.51.82.12.32宀1).50.Z0463.3.4?.；8.9.911IZ110.30删1).251-22.02.73.334.24.751D.4-1.1-D. 240.420.92L31.2.12.32.510.5-UZ35小80.0必1.1】31.3U61.7Q2-0.S5133.14.76.1 T.41M9.611120.31.100.88U6232.8333.74.14.30.4-1-2-0.480.100.540.891.21

17、.41.61.82.M0：51.S-0.62-0.140.21山470巒0.850.99UI1.2(1.61369-0.260说0.260*420.5?D.660.75皿 0R10.20.061.83.55.16$788.91011120.3-0.5Z0.351.LU72.32.33.2390,4-0.$7-0. (150.43O.flOkl】41.6U81.92.10.6-0.750.270.050.2B0. 450阴0.5S0.760从叽空|0.7-0.77-0.31-0.1)2oW0.32仇430.50Q.5A0.61i).b50.K-0.78-0.34-0.O70.120.240.330.390.40.47D.501.0O.Z0.40243畀5.26,6人8g.o1】11120.3-0.2J0.541.2U82.32.73.13.7