不同温度下的干空气黏度、比热容以及黏度-温度曲线

TemperatureRatio ofSpecificHeatsDynamicViscosityThermalConductivityKinematicViscosity1)Density1)

(K)- k -- μ -(10-5 kW/m K)- ν -- ρ -- cp -- cv -(cp/cv)(10-5 kg/ms)(10-5 m2/s)(kg/m3)(kJ/kgK)(kJ/kgK)1751.00230.71521.4011.1821.5930.7440.5862.0172001.00250.71541.4011.3291.8090.7360.7531.7652251.00270.71561.4011.4672.020.7280.9351.5692501.00310.7161.4011.5992.2270.721.1321.4122751.00380.71671.4011.7252.4280.7131.3431.2843001.00490.71781.41.8462.6240.7071.5681.1773251.00630.71921.41.9622.8160.7011.8071.0863501.00820.72111.3982.0753.0030.6972.0561.0093751.01060.72351.3972.1813.1860.6922.3170.94134001.01350.72641.3952.2863.3650.6882.5910.88244501.02060.73351.3912.4853.710.6843.1680.78445001.02950.74241.3872.674.0410.683.7820.7065501.03980.75271.3812.8494.3570.684.4390.64186001.05110.7641.3763.0174.6610.685.1280.58836501.06290.77581.373.1784.9540.6825.8530.5437001.0750.78791.3643.3325.2360.6846.6070.50437501.0870.79991.3593.4825.5090.6877.3990.47068001.09870.81161.3543.6245.7740.698.2140.44128501.11010.8231.3493.7636.030.6939.0610.41539001.12090.83381.3443.8976.2760.6969.9360.39229501.13130.84421.344.0266.520.69910.830.371610001.14110.8541.3364.1536.7540.70211.760.35310501.15020.86311.3334.2766.9850.70412.720.336211001.15890.87181.3294.3967.2090.70713.70.320911501.1670.87991.3264.5117.4270.70914.70.306912001.17460.88751.3234.6267.640.71115.730.294112501.18170.89461.3214.7367.8490.71316.770.282413001.18840.90131.3194.8468.0540.71517.850.271513501.19460.90751.3164.9528.2530.71718.940.261514001.20050.91341.3145.0578.450.71920.060.252115001.21120.92411.3115.2648.8310.72222.360.235316001.22070.93361.3085.4579.1990.72424.740.220617001.22930.94221.3055.6469.5540.72627.20.207618001.2370.94991.3025.8299.8990.72829.720.196119001.2440.95691.36.00810.2330.7332.340.1858Specific HeatPrandtlNumber

干空气物理性质表（101.33Pa）

温度 t

( ℃ ) 密度ρ

(kg/m 3 ) 比热 c,

(kJ/kg? ℃ ) 导热系数λ ×

10 2

(W/m? ℃ ) 粘度

μ × 10 5

(Pa?s) 普兰德数

Pr

-50

-40

-30

-20

-10

0

10

20

30

40

50

60

70

80

90

100

120

140

160

180

200

250

300

350

400

500

600

700

800

900

1000

1100

1200 1.584

1.515

1.453

1.395

1.342

1.293

1.247

1.205

1.165

1.128

1.093

1.060

1.029

1.000

0.972

0.946

0.898

0.854

0.815

0.779

0.746

0.674

0.615

0.566

0.524

0.456

0.404

0.362

0.329

0.301

0.277

0.257

0.239 1.013

1.013

1.013

1.009

1.009

1.009

1.009

1.013

1.013

1.013

1.017

1.017

1.017

1.022

1.022

1.022

1.026

1.026

1.026

1.034

1.034

1.043

1.047

1.055

1.068

1.072

1.089

1.102

1.114

1.127

1.139

1.152

1.164 2.035

2.117

2.198

2.279

2.360

2.442

2.512

2.593

2.675

2.756

压力atm0.01atm1atm4atm7atm10atm40atm70atm100atm压力Mpa温度K℃50-223.151.4048

60-213.151.4031

70-203.151.4023

80-193.151.4019

90-183.151.4017

-273.15

100-173.151.4016

110-163.151.40151.42021.49601.60351.7672

120-153.151.40151.41661.47301.55131.6395

130-143.151.40151.41391.45781.51391.5740

140-133.151.40151.41191.44731.49011.5350

-273.15

150-123.151.40141.41021.43931.47341.50842.7372

160-113.151.40141.40891.43381.46141.48962.1168

170-103.151.40141.40791.42901.45211.47561.8886

180-93.151.40141.40711.42531.44481.16481.76782.3139

190-83.151.40131.40641.42221.43911.45601.69222.0467

-273.15

200-73.151.40121.40571.41971.43491.44891.64181.90002.1376

210-63.151.40131.40531.41771.43061.44371.60265.59381.9802

220-53.151.40121.40481.41581.42721.43891.57401.73181.8769

230-43.151.40111.40441.41431.42461.43481.55151.68181.8012

240-33.151.40111.40401.41291.42221.43131.53341.69341.7439

空气比热容温度对照表

比热容：

例如如图，同时加热时，沙子吸热温度升高的快，说明了不同物质吸热的本领是不一样的，这种差异性用比热容来描述。

注意：加热方式相同时，水和沙子在相同时间内吸收的热量是一样多的。

(1)定义：单位质量的某种物质，温度升高(或降低)l℃时所吸收(或放出)的热量叫做这种物质的比热容。

(2) 意义：反映条件相同的情况下，物质吸热本领的物理量。

(3) 单位：J／(kg·℃)读作焦每千克摄氏度。

(4)比热容表：各种物质的比热容可以在比热容表中查到，从表中可以看出，物质不同，比热容也不同，可见比热容是物质的特性之一。

注意：（1）一般来说，液体的比热比固体的大（水银除外）有些不同物体的比热容是相等的。

（2）用同一热源加热时，不同物体在相同时间内吸收的热量是相等的。