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CEIE 230 Assignment 07

CEIE 230 Assignment 07 - Q = 2.88 ft 3/sec and V = 14.56...

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CEIE 230 – Homework Assignment No. 7 Assigned March 24, 2008. Due March 31, 2008 at start of class. Read: “Fluid Mechanics”, Chapter 8 1. Problem 8.40 2. Problem 8.41 ......................................................................................... P P = 24.4 HP 3. Problem 8.51 (Note: Instead of the pipe roughness of zero as given in the text, assume that the pipe is very rough concrete with an absolute roughness ε =0.01). Ans: P p = 111 HP 4. Water at is pumped from point (A) to point (B) through three pipes is series. The first is 4,000-ft of 18” concrete pipe (1) which connects through a sudden contraction to 2,000-ft of 10” cast iron pipe containing a ½ -closed gate valve and then connects through a sudden contraction to 1,000-ft of 6” galvanized iron pipe. The pressure drops from 120 psi at point (A) to 50 psi at point (B). Calculate the flow rate (Q) through the system of pipes and the velocity (V) at point (B).
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Unformatted text preview: Q = 2.88 ft 3 /sec and V = 14.56 ft/sec 5. Problem 8.63. ....................................................................... Q (60M) = 0.028 M 3 /sec Q (20M) = 0.014 M 3 /sec Q ( 0M) = 0.014 M 3 /sec 6. Problem 8.57 . ......................................................................................... D = 0.58 feet Extra Credit 7. Problem 8.30 2 (1) Assume a mid-range roughness for the concrete pipe. (2) A Tee has two possible flow paths – straight through and a 90 ° turn. The headloss coefficient (Km) for straight through flow is called “Line Flow” in Table 8.2 whereas the K m value for flows making a 90 ° turn is called “Branch Flow”. Also notice that the nozzle represents a sudden contraction to the flow. Figure 8.14 (p.296) can help you evaluate the magnitude of the K-value due to the nozzle....
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