凹凸烟管传热与阻力性能计算报告书

凹凸烟管传热与阻力性能计算报告书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）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。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0－1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0－2单节距1/4凹凸管示意图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（5－25m/s）选取若干个速度点进行计算，流动介质为炉膛烟气。计算结果图0－2为500℃时的速度分布示意图，其入口平均流速为15m/s，图0－3为凹凸管最大截面及最小截面处中心线上的速度分布图0－3凹凸管中心及两端截面速度分布云图图0－4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1－1两种管子的努谢尔特数图1－2两种管子的努谢尔特数之比图1－3两种管子的阻力系数图1－4两种管子的阻力系数之比图1－5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2－1两种管子的努谢尔特数图2－2两种管子的努谢尔特数之比图2－3两种管子的阻力系数图2－4两种管子的阻力系数之比图2－5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3－1两种管子的努谢尔特数图3－2两种管子的努谢尔特数之比图3－3两种管子的阻力系数图3－4两种管子的阻力系数之比图3－5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4－1两种管子的努谢尔特数图4－2两种管子的努谢尔特数之比图4－3两种管子的阻力系数图4－4两种管子的阻力系数之比图4－5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5－1两种管子的努谢尔特数图5－2两种管子的努谢尔特数之比图5－3两种管子的阻力系数图5－4两种管子的阻力系数之比图5－5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6－1两种管子的努谢尔特数图6－2两种管子的努谢尔特数之比图6－3两种管子的阻力系数图6－4两种管子的阻力系数之比图6－5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7－1两种管子的努谢尔特数图7－2两种管子的努谢尔特数之比图7－3两种管子的阻力系数图7－4两种管子的阻力系数之比图7－5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.