ʯӲ߼ʹ˵


ִУȱVB6.0̬֧֣װ̬ˮ߻
̷󼴿ʹá

ݣѹʽʯƹ淶﹫ʽ

ܣ
1 ѡ¹ʽƽ߼
  վʽ
  ŵʽ
  ׵عʽ
2 ԶˮǳˮǳˮԶ⡣

зӺˮ߶ȼ
ۺĦϵKȡֵΧΪ1.55.010^(-6),Ӻ߽С
пȫѡ5.010^(-6)ˮ߼нǦȡ0ȣ
ΪֵʹùпɸʵԸü

ϵ
ٸ߶ϵKz,ʼ͸ϵKϵKw 
ɸݡѹʽʯƹ淶и1.41.51.6 ѡȡ£

1.4  ٸ߶ W10=Kz*Wz

߶Zm   2     5     10   15    20   

ϵKz   1.25  1.10  1.0  0.96  0.90 


1.5   ʼ͸ϵK

                    |   K

⻬͸ˮ棨| 1.0
廤        | 0.9
Ƥ                    | 0.850.90
ʯ                    | 0.750.80
ʯ͸ˮ棩  | 0.600.65
ʯ͸ˮ棩    | 0.500.55


1.6  ϵKw

w/(gh)^.5   <=1   1.5   2    2.5   3     3.5   4     >=5

Kw          1     1.02  1.08 1.16  1.22  1.25  1.28  1.30

