Problem 03 - Bernoulli's Energy Theorem

Problem 3
A 300-mm pipe is connected by a reducer to a 100-mm pipe. See Figure 4-02. Points 1 and 2 are at the same elevation, the pressure at 1 is 200 kPa. The discharge Q is 30 liters per second flowing from 1 to 2 and the energy lost from 1 to 2 is equivalent to 20 kPa.

  1. Compute the pressure at 2 if the liquid is water.
  2. Compute the pressure at 2 if the liquid is oil (sp gr = 0.80).
  3. Compute the pressure at 2 if the liquid is molasses (sp gr = 1.5).

 

fig_4-02_pipe-decreasing-pipe.gif

 

Solution 3

 

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