气体动力学基础2 (2)

1、 流体力学流体力学 0 lim V m V V m ( , , )A x y z xy z V m ( , , )A x y z xy z ( , , , ) ( , , , ) ( , , , ) uu x y z t x y z t pp x y z t 0 lim V m V m V m V 1 v v w w = m V 解解： 33 -4 0.453 =0.906 10kg/m 5 10 w 3 3 0.906 10 =0.906 1.0 10 pV p p 1 1 = T V Vp V pV p p p 1 = T p EV V p V V 020406080100 0.43 0.

2、44 0.45 0.46 0.47 0.48 0.49 0.50 , 10 -9Pa-1 t, 020406080100 2.00 2.05 2.10 2.15 2.20 2.25 2.30 K, 10 9Pa t, 92 =2.17 10 N/mE 9 p 2 0.46 1m0/ N 11 = t p VV VTVT TV t 92 p 0.46 1m0/N 924 =2.17 10, N0m.5 1/1 t E 020406080100 -2 0 2 4 6 8 v, 10-4-1 t, 4 1.5 10 t 29 p 4 m / 0.46 10 1. N 5 10 t 1 =- p dV

3、 V dP 解解: : 10-1 5 0.001 =5.1 10Pa 54.9 1098000 1 p E 9 10 1 1.96 10Pa 5.1 10 h U O x y u U uy h h U O x y u F d d u FA y F A d d u y h U O x y u x y u 2 m / s 0100200300400 0 50 100 150 200 , 10 -5Pa.s t, 0100200300400 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Experimental data Calculated value ,

4、 10 -6m2/s t, 17.86763 63.33859 0.012220.0826 0.08422 t t e e 30060090012001500 1 2 3 4 5 6 Experimental data Calculated value , 10 -5Pa.s T, K 0.47766 1.20967 0.20109(273)t 200 400 600 800 1000120014001600 0 5 10 15 20 25 Experimental data Calculated value , 10 -5m2/s T, K 4.57531 0.25405 2.29991 1

5、0 (273)t 1 2 t t E t t E 2 t 0.0631 0.0731 t t E E d d u y 0 d d n u K y 0 K n d /duy 0 n K n K 0 K = d / duy r 0 r O f fl B A 0100200300400 0 20 40 60 80 , 10 -3N/m t, 0100200300400 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 Calculated value Experimental data , 10 -3N.m2/kg t, 72 2.65344 10(188.64/ 757) 0.08 399 t 9 10 m r h h 2fr mg 2 mgrgh cosfmg 2 2cosrrgh 2 cosr gh 2 cos h gr 00 limlim VV xyz F ff if F f mm jk F V 0, 0, xyz fffg f F m , xyz fff n y z x p F V A O n y z x p F V A O 0 lim V P p A -1 0.00055K t U x y u =0.9807Pa s 1 = t dV V dt 解解: : 211 d t QQtQ 3 60 0.00055