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  3. 수리학 Hydraulics

diameter of circular pipe according to water flow (using Hazen-Williams average flow velocity)

작성자 Uploader : simplelife 작성일 Upload Date: 2023-05-31변경일 Update Date: 2023-05-31조회수 View : 74

The average flow velocity formula of Hazen-Williams is applied to obtain the diameter D (m) of the circular pipe to pass the flow rate Q (m^3/s).

V = 0.849*C_HW*R^0.63*S^0.54

R = D/4

A = (π/4)*D^2

Q = AV = (π/4)*D^2*0.849*C_HW*(D/4)^0.63*S^0.54

(π/4)*D^2.63*0.849*C_HW*(1/4)^0.63*S^0.54 = Q

D = (Q/((π/4)*0.849*C_HW*(1/4)^0.63*S^0.54))^(1/2.63)

C_HW : Hazen-Williams coefficient,
S : slope of pipe line or energy slope = H/L,
L : distance (m),
H : water head difference (m)

D = (Q/((π/4)*0.849*C_HW*(1/4)^0.63*(H/L)^0.54))^(1/2.63)

*** 참고문헌[References] ***
D = (Q/((π/4)*0.849*C_HW*(1/4)^0.63*(H/L)^0.54))^(1/2.63)
변수명 Variable 변수값 Value 변 수 설 명 Description of the variable


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