強迫風冷散熱器計算工具

功耗參數(shù),,散熱器參數(shù),,空氣參數(shù),,風機參數(shù),,,層流/紊流選擇,空氣參數(shù),,,,,

Q[W],6200,散熱器寬度W[mm],521,環(huán)溫[℃],40,進出風口空氣△t,10,,需進行規(guī)劃求解,全管長平均溫度Tf℃,40,45,50,55,60

,,散熱器長度L[mm],300,全管長平均溫度Tf,45,計算風量[m3/min.],45.94,,需輸入?yún)?shù),氣壓100kpa,1.013,1.013,1.013,1.013,1.013

,,散熱器高度H[mm],78,氣壓100kpa,1.013,計算風量[CFM],1623,,,空氣密度ρkg/m3,1.128,1.110,1.093,1.076,1.060

,,翅片高度Hf[mm],63,空氣密度ρkg/m3,1.128,風機風量[m3/min.],46.38,,,比熱容J/(kg.k),1005,1005,1005,1005,1005

,,Hb[mm],15,比熱容J/(kg.k),1005,風機風量[CFM],1638,,,運動粘度m2/sν*10^6,16.96,17.46,17.95,18.46,18.97

,,Wf[mm],1,運動粘度m2/sν*10^6,16.96,風機靜壓[Inch.H2O],4.02,,,普朗特數(shù)Pr,0.699,0.699,0.698,0.697,0.696

,,Ws[mm],3,普朗特數(shù)Pr,0.699,風機風量q1[m3/min.],46.38,,,導熱系數(shù)W/m.℃λ*10^2,2.76,2.80,2.83,2.87,2.9

,,Nf,131,導熱系數(shù)W/m.℃λ*10^2,2.76,風機靜壓P1[Pa],0,,,膨脹系數(shù)℃-1β*10^6,3.19,3.15,3.1,3.05,3

,,導熱系數(shù)W/m.℃λ,208,膨脹系數(shù)℃-1β*10^6,3.19,風機風量q2[m3/min.],42,,,動力黏度Pa.sμ*10^6,19.1,19.4,19.6,19.9,20.1

,,de[m],0.0057,動力黏度Pa.sμ*10^6,19.1,風機靜壓P2[Pa],120,,,,,,,,

tw2,75,導熱側(cè)面積A1[m^2],0.16,,,風機靜壓[Pa],1001,,,,,,,,

Re,10624,對流換熱面積A2[m^2],5.11,,,風機風速[m/s],31.5,,,,,,,,

工作Re,4633,翅間面積A2[m^2],0.12,,,風機風量[m3/s],0.773,,,,,,,,

層流-努謝爾特數(shù)Nu,7.4,翅片面積A2[m^2],4.99,,,P-Q后半段斜率bp=b*q+c,-27.4,,,,,,,,

紊流-努謝爾特數(shù)Nu,17.1,通風面積A0[m^2],0.02,,,P-Q后半段常數(shù)cp=b*q+c,1270.7,,,,,,,,

過渡流-努謝爾特數(shù)Nu,14.4,截面積A1[m^2],0.04,,,0=a*q^2-b*q-c,0.0,,,,,,,,

努謝爾特數(shù)Nu,14.4,通風面積比Ka,0.60,,,風機工作風量[m3/min.],20.23,,,,,,,,

換熱系數(shù)h[W/m2.K],69.6,粗糙度K[m],0.0000015,,,風機工作風量[CFM],714,,,,,,,,

m,25.9,收縮局部壓損系數(shù)Kc,0.20,,,風機工作風量[m3/s],0.337,,,,,,,,

翅片效率ηf,0.57,擴大局部壓損系數(shù)Ke,0.16,,,風機工作靜壓[Inch.H2O],2.88,,,,,,,,

總效率η,0.58,層流-沿程阻力系數(shù)f,0.006,,,風機工作靜壓[Pa],717,,,,,,,,

總熱阻R[K/W],0.005,紊流-沿程阻力系數(shù)f,0.031,紊流Re3000~1000000,,風機工作風速[m/s],13.7,,,,,,,,

導熱熱阻R1[K/W],0.000,紊流-沿程阻力系數(shù)f,0.015,紊流Re>1000000,,,,,,,,,,,

對流熱阻R2[K/W],0.005,紊流-沿程阻力系數(shù)f,0.031,紊流柯爾布魯克公式,,,,,,,,,,,

△t[℃],33.1,,6.0071E-08,規(guī)格求解等式結(jié)果=0,,,,,,,,,,,

△t1[℃],2.9,,2.046984423,≥0.005,,,,,,,,,,,

△t2[℃],30.2,沿程阻力系數(shù)f,0.031,,,,,,,,,,,,

基板溫度tw1[℃],78,系統(tǒng)壓降系數(shù)a,1.75,,,,,,,,,,,,

肋壁溫度tw2[