Part A i. Write the Darcy-Weisbach equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for the friction coefficient, λ? iii. For constant λ, if the discharge is doubled, by what factor does the head loss increase? Part B i. Write the Hazen-Williams equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for the friction coefficient, CHW? iii. For constant CHw, if the discharge is doubled, by what factor does the head loss increase? Part C i. Write the Manning equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for Manning's n, with units? iii. For constant n, if the discharge is doubled, by what factor does the head loss increase?
Part A i. Write the Darcy-Weisbach equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for the friction coefficient, λ? iii. For constant λ, if the discharge is doubled, by what factor does the head loss increase? Part B i. Write the Hazen-Williams equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for the friction coefficient, CHW? iii. For constant CHw, if the discharge is doubled, by what factor does the head loss increase? Part C i. Write the Manning equation for friction head loss, ht=... ii. For iron pipes, what is a typical, midrange value for Manning's n, with units? iii. For constant n, if the discharge is doubled, by what factor does the head loss increase?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 2: Comparing Three Equations for Head Loss
Compare three equations for friction head loss in pipes, assuming constant friction factors.
Recall the slope of the energy grade line (EGL) is S = he/L.
Part A
i. Write the Darcy-Weisbach equation for friction head loss, ht=...
ii. For iron pipes, what is a typical, midrange value for the friction coefficient, λ?
iii. For constant 2, if the discharge is doubled, by what factor does the head loss increase?
Part B
i. Write the Hazen-Williams equation for friction head loss, ht=...
ii. For iron pipes, what is a typical, midrange value for the friction coefficient, CHW?
iii. For constant Chw, if the discharge is doubled, by what factor does the head loss increase?
Part C
i. Write the Manning equation for friction head loss, ht=...
ii. For iron pipes, what is a typical, midrange value for Manning's n, with units?
iii. For constant n, if the discharge is doubled, by what factor does the head loss increase?
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