凹凸烟管传热与阻力性能计算报告书.docx

凹凸烟管传热与阻力性能计算报告书1、 目的获得凹凸管的传热与阻力性能特征，并比较同等条件下光管的传热与阻力特性，对凹凸管的性能有一个量的认识，具体需要获得以下数据：放热系数（或努谢尔特数）、沿程阻力系数（或压差）2、 方法采用CFD/NHT技术（计算流体力学及传热学）建立对象的流体力学和传热学微分方程，并对其进行数值化求解。3、 计算对象描述计算对象（凹凸管）是具有上下、左右对称的粗糙管，其具体结构如下图所示。图01凹凸管整体结构示意图因其对称性，故可取其1/4作为计算对象，其网格划分如下。图02单节距1/4凹凸管示意图4、 计算过程为与光管性能进行比较，计算在充分发展条件下进行，并分别在给定速度范围内（525m/s）选取若干个速度点进行计算，流动介质为炉膛烟气。5、 计算结果图02为500时的速度分布示意图，其入口平均流速为15m/s，图03为凹凸管最大截面及最小截面处中心线上的速度分布 图03凹凸管中心及两端截面速度分布云图图04凹凸管最大截面和最小截面处水平及垂直中心线上速度分布（1/4大小） 以下是计算所得的8组数据，分别为300、400、500、600、700、800、900及1000时的结果。(一)、300度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)54584.150.24520.031790.4551954.146.9570.213267.56876.230.4450.02560.4140666.1857.43143.70635109168.30.65240.021150.3774273.3663.66232.8707112.511460.380.89880.018650.3546780.1369.53341.921851513752.461.14240.016460.3393684.9973.75471.1207417.516044.531.41620.014990.3283386.6575.19620.402662018336.611.77340.014370.3181394.0881.64785.1453822.520628.682.18440.013980.3127999.2986.16977.026682522920.762.680340.01390.30825106.9892.831188.6714续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.08720.0538125.0621.758.3892.158627.672841.378750.16860.0462932.7528.4216.07322.020768.114141.274920.27250.0420540.0734.7725.7321.830898.14161.154270.39540.0390646.9740.7637.0221.705848.235491.072720.53930.03753.0044651.1171.603268.319251.005970.710.0357959.61851.7367.921.453518.321930.911940.89980.0347166.8355884.91.407598.312240.883361.12120.0340974.39564.56108.41.334578.322440.837311.35850.0335581.0970.37131.781.319178.332870.82742(2)、数据处理图11两种管子的努谢尔特数图12两种管子的努谢尔特数之比图13两种管子的阻力系数图14两种管子的阻力系数之比图15凹凸烟管的综合性能评价(二)、400度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)53477.920.24090.03670.4480855.1440.6358.817.55216.880.43270.02930.4080166.4648.97120.49106955.840.660.025140.3724476.8856.65195.5312.58694.80.8990.021920.3512484.15962.01288.131510433.751.17290.019860.3341190.0866.37394.6717.512172.711.4260.017740.3163594.62169.72508.632013911.671.728130.016460.3112399.9373.63653.5922.515650.632.0450.015390.30697105.377.59815.882517389.592.40070.014660.29892111.45282.12980.83续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.083580.0606723.9517.658.3072.301957.385871.482680.161530.052130.8522.7316.2392.154447.831971.369880.26070.0472937.3727.5426.2762.056957.876331.306270.38210.0443843.7332.2338.4611.924047.91431.220570.52410.0422449.9936.8352.5781.802197.910211.14340.68540.0405755.9641.2368.6471.691027.797341.076270.86210.039161.5345.3486.3611.624017.96091.028911.05280.0377166.749.15105.7721.578638.139470.995291.2530.0363871.44652.644126.1851.559968.216380.98149(2)、数据处理图21两种管子的努谢尔特数图22两种管子的努谢尔特数之比 图23两种管子的阻力系数图24两种管子的阻力系数之比图25凹凸烟管的综合性能评价(三)、500度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)52757.760.23470.041090.3775956.7136.3143.147.54136.640.41970.032650.363167.5143.2293.34105515.520.64880.028390.3515877.3749.54160.6712.56894.40.91750.02570.3315388.0756.39236.73158273.281.20830.02350.3222696.4661.76331.3617.59652.161.49420.021350.31215102.8765.86436.882011031.031.80110.019710.30654106.6568.28560.3622.512409.912.07460.017930.3011110.7970.93696.612513788.792.35810.016510.29189113.1672.45833.7续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.080610.0671924.7715.867.82.289415.619741.565980.15120.05631.3720.0814.532.152396.483971.426650.24060.0501437.7724.1822.952.04887.011481.334820.34660.0462343.7528.0132.932.013217.474381.293310.46920.0434649.6731.844.281.942147.862211.233840.6080.0413855.3735.4557.171.857837.993291.1760.75990.0395960.8838.9871.091.751678.157371.103850.9220.0379566.8342.7983.821.657638.047471.047711.10510.0368571.3745.69699.651.585487.826421.00827(2)、数据处理 图31两种管子的努谢尔特数图32两种管子的努谢尔特数之比 图33两种管子的阻力系数图34两种管子的阻力系数之比图35凹凸烟管的综合性能评价(四)、600度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)52244.0630.20440.04770.3968456.15831.78840.187.53366.090.4060.020050.3542466.21837.48280.7104488.130.6260.03090.3471977.38743.804140.6112.55610.160.87610.027690.3372486.87749.176213.41156732.191.16260.025520.3309596.35554.54301.5817.57854.221.47650.023810.32994105.26159.582409.23208976.251.76150.021750.32338110.00162.265523.8822.510098.282.02690.019770.31916113.25964.11654.382511220.322.33730.018470.30933115.0365.114782.98续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.041220.0387710.696.054.265.2542110.235363.149820.14650.0612431.45217.80314.0032.105385.784611.430970.23080.0542937.16721.03722.172.082246.395521.384320.32750.0492944.24725.04529.121.963516.842561.286130.44630.0466448.42227.40942.471.989867.095451.293020.56660.043555.38531.3549.651.900547.584021.217030.71680.0421459.3733.60566.81.852857.674361.18340.86840.0403365.23436.92577.751.736227.913091.101461.05980.0398868.18838.597101.421.687027.757151.07495(2)、数据处理图41两种管子的努谢尔特数图42两种管子的努谢尔特数之比图43两种管子的阻力系数图44两种管子的阻力系数之比图45凹凸烟管的综合性能评价(五)、700度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)51872.970.1930.042540.3633149.725.2432.977.52809.460.41050.04020.3533568.9134.9972.15103745.950.60680.033430.3483777.1239.17126.4612.54682.430.84860.029920.3425586.9844.17194.29155618.921.11910.02740.3370295.748.6275.2617.56555.411.41620.025480.33384104.1552.89371.13207491.91.73410.023890.32694112.8757.32474.7122.58428.382.01920.021970.32347118.0259.94594.44259364.862.31630.020420.3226119.7160.8731.9续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.04770.0500512.266.225.114.057887.25922.623630.14250.0664831.5816.0413.572.181425.315461.51050.22220.0582936.8718.7221.292.092415.977021.411960.31770.0533342.2821.4730.472.057296.422811.366460.41990.0489549.2224.99536.531.944396.884621.271890.54950.0470852.726.7752.261.975727.091561.283990.67210.0440959.4830.2158.251.897387.41591.221010.82130.0425763.3632.1873.951.862657.598331.192261.00820.0423265.0333.03100.591.840757.623061.17741(2)、数据处理 图51两种管子的努谢尔特数图52两种管子的努谢尔特数之比图53两种管子的阻力系数图54两种管子的阻力系数之比图55凹凸烟管的综合性能评价(六)、800度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)51596.770.2260.037650.5542657.8226.5445.72627.52395.160.40980.030490.4853171.7932.9590.085103193.550.62130.026090.4395682.6637.94145.056212.53991.940.86050.023130.4106991.9942.23211.76154790.321.13310.021020.40038101.6646.66297.2817.55588.711.44440.019810.38069111.7251.28384.73206387.11.73050.017890.37558120.8655.48495.7622.57185.482.05770.016990.35945124.2957.05600.5257983.872.37970.015880.35685129.86559.61736续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.075930.0876714.516.668.253.984986.322082.656060.13980.0717631.6914.5513.422.264616.762731.487190.21680.0625737.4517.1946220.482.20657.0251.436950.30720.0567142.319.4214229.2352.17447.241321.406630.4310.0552948.0622.0660441.242.114567.241961.367890.54450.0512955.0425.2708147.192.029227.422831.305580.64290.0463860.5727.8098355.441.994988.097631.259210.79550.0453564.8929.7932975.891.914867.926461.214340.98170.0453367.9831.2120297.691.909847.872481.21298(2)、数据处理图61两种管子的努谢尔特数图62两种管子的努谢尔特数之比图63两种管子的阻力系数图64两种管子的阻力系数之比图65凹凸烟管的综合性能评价(七)、900度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)51377.050.16450.043710.3493749.8820.9526.297.52065.570.40270.047570.5097772.3330.3886.31102754.10.61480.040850.4621983.6835.15139.1212.53442.620.84990.036140.4286393.139.1201.59154131.151.11480.032920.4145102.0842.87280.7217.54819.671.41980.03080.39806111.4846.82366.94205508.21.73160.028760.38478121.2150.91463.2822.56196.722.05340.026950.39301130.654.85598.88256885.252.43510.025890.37379134.7356.59703.2续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.041010.051914.055.9013.773.550256.730962.33390.079560.0447514.816.22028.514.8840911.390852.859840.21130.0668637.7515.85519.732.216976.913141.448870.29940.0606242.1917.719828.672.206577.070881.434940.39310.0552948.5820.403634.442.10117.497411.348860.51060.0527653.6222.520448.812.0797.544531.332830.61790.0488658.524.5751.832.072047.87571.315870.75670.0472965.0927.337869.392.006388.311481.259170.91790.0464769.329.10691.631.944278.044351.22899(2)、数据处理图71两种管子的努谢尔特数图72两种管子的努谢尔特数之比图73两种管子的阻力系数图74两种管子的阻力系数之比图75凹凸烟管的综合性能评价(八)、1000度计算结果(1)、原始数据速度（m/s）雷诺数壁面剪切应力(凹凸管)(Pa)摩擦阻力系数(凹凸管)阻力系数(凹凸管)放热系数(凹凸管)（w/m2k）努谢尔特数(凹凸管)单位管长压降(凹凸管)(Pa/m)51193.180.18010.05260.41651.0119.6628.67.51789.770.39430.050980.5550572.527.9485.86102386.360.60630.04410.4844784.2332.46133.2312.52982.950.83930.039070.4477793.9936.22192.4153579.551.09970.035550.43045102.83339.62266.3417.54176.141.39550.033140.41278111.5342.98347.64204772.731.70920.031080.40087121.0246.64440.9622.55369.322.06210.029620.39513131.3650.62550.09255965.912.50890.02920.39186135.0552.04673.51续表壁面剪切应力(光管)(Pa)阻力系数(光管)放热系数(光管)（w/m2k）努谢尔特数(光管)单位管长压降(Pa/m)放热系数之比阻力系数之比综合性能评价0.056380.078115.966.155.853.196125.326362.212120.085080.0523815.976.159.094.5397610.596262.700840.20720.0717637.5714.4819.662.241956.751521.472850.29170.0646542.7416.4727.362.199116.925611.436630.38110.0586648.218.5833.532.133467.338151.376120.4930.0557552.9720.4147.242.105537.40411.355430.59540.0515557.6222.2050.252.100317.776421.337560.73130.0500363.5924.5068.732.065737.898191.311050.88260.0489165.6425.2987.532.057438.012531.30166(2)、数据处理图81两种管子的努谢尔特数图82两种管子的努谢尔特数之比图83两种管子的阻力系数图84两种管子的阻力系数之比图85凹凸烟管的综合性能评价