均勻送吸風管道計算表

條縫、孔口均勻送風管道計算,,,,,,,,,,,,,,,,,

靜壓不變,,,,,,,,,,,,,,,,,

沿程阻力=動壓變化,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,H=,,,

,,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,W=,309,,

,左右面對稱,5000,10000,4500,4000,3500,3000,2500,2000,1500,1000,500,140,b0=,20,mm,自動

,,,,500,500,500,500,500,500,500,500,500,140,出風量,自動,,

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斷面編號,,,0,1,2,3,4,5,6,7,8,9,10,,,,

斷面風量,L,,5000,4500,4000,3500,3000,2500,2000,1500,1000,500,140,自動,,,

動壓,Pd=0.5ρVd^2,,12.150,11.490,10.851,10.229,9.621,9.021,8.423,7.813,7.169,6.431,5.574,自動,Pdn=Pdn-1-ΔP,,

靜壓,Pj=0.5ρVj^2,,41.67,41.67,41.67,41.67,41.67,41.67,41.67,41.67,41.67,41.67,41.67,自動,,,

流速,Vd=1.29Pd^0.5,,4.5,4.37,4.25,4.13,4.00,3.87,3.74,3.61,3.45,3.27,3.05,自動,,,

斷面面積,㎡=L/(3600*Vd),,0.309,0.286,0.261,0.236,0.208,0.179,0.148,0.116,0.080,0.042,0.013,自動,,,

斷面尺寸mm*mm,W*H,309,1000,926,847,763,675,581,481,374,261,138,41,自動,C16不變,,

當量直徑De=,2wh/(w+h),,0.472,0.463,0.452,0.440,0.424,0.403,0.376,0.338,0.283,0.190,0.073,自動,C16不變,,

圓形管道D=,,,627,603,577,548,515,478,435,384,320,232,128,自動,,,

出流角tga=,Vj/Vd,,1.85,1.91,1.96,2.02,2.08,2.15,2.23,2.31,2.41,2.55,2.74,自動,"應大于1.73,B31不變",,

出流角a°=,,,——,62.31,62.98,63.66,64.35,65.06,65.81,66.60,67.49,68.57,69.92,自動,應大于60°,,

管段編號,,,——,0-1,1-2,2-3,3-4,4-5,5-6,6-7,7-8,8-9,9-10,,,,

管段長度l=,m,,——,1.4,1.4,1.4,1.4,1.4,1.4,1.4,1.4,1.4,1.12,自動,,,

比摩阻R=,0.0105*De^-1.21*V^1.925,,——,0.472,0.456,0.444,0.434,0.428,0.428,0.435,0.460,0.527,0.766,自動,,,

沿程阻力ΔP=,R*l,,——,0.660,0.639,0.622,0.608,0.600,0.599,0.610,0.644,0.737,0.857,自動,局部阻力不計,,

沿程阻力Py=,,,6.576,自動,,,,,,,,,,,,,

全壓Pq=,Pj0+Pd0,,53.817,自動,,,,,,,,,,,,,

鍍鋅板展開面積F=,,,46.46,自動,左右對稱風管的總面積,,,,,,,,,,,,

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已知：,,,,,,,,,,,,,,,,,

條縫流量系數(shù)u=,0.6,輸入,在0.6-0.65間取值，,,,,,,,,,,,,,,

送風量L=,10000,輸入,總風量,,,,,,,,,,,,,,

管道是否對稱,2,輸入,1=不對稱，2=左右對稱,,,,,,,,,,,,,,

管道單側總長l=,14,輸入,,,,,,,,,,,,,,,

縫、口數(shù)量,1,輸入,,,,,,,,,,,,,,,

設：,,,,,,,,,,,,,,,,,

縫、口出風速度V0=,5,輸入,,,,,,,,,,,,,,,

首端0-0風速Vd0=,4.5,輸入,,,,,,,,,,,,,,,

則：,,,,,,,,,,,,,,,,,

縫、口面積總=,0.278,自動,,,,,,,,,,,,,,,

縫、口面積每個=,0.278,自動,,,,,,,,,,,,,,,

條縫寬度mmb0=,20,自動,,,,,,,,,,,,,,,

孔口直徑mm=,595,自動,,,,,,,,,,,,