Tutorial for CIVL252 Hydraulics Lesson 2

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Tutorial for CIVL252 HydraulicsLesson 2

• By DUAN Huanfeng
• ceduan_at_ust.hk

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Example 1

• Problem
• Find the head H in the reservoir needed to
  accelerate the flow of oil, S0.85, at the rate
  of 0.5 ft/s2 when the flow is 8.02 ft/s. at 8.02
  ft/s the steady state head on the pipe is 20 ft.
  Neglect entrance loss but do consider the pipe
  friction losses.

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Solution

• For C.V., Momentum EQ. (General form)

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Example 2

• Problem
• A V-shaped flume has side slope 450 with the
  horizontal. The water surface width in the flume
  is 3ft and the discharge is 30 cfs. What is the
  specific energy, and is the flow supercritical or
  subcritical?

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Solution

• First, Derive a formula for this V-shaped flume
  at a critical state
• When at critical state

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• Second, solve this problem