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PROBLEMS ON FLUID FLOW IN PIPES 1. What is the hydraulic radius of a rectangular air duct 300mm by 500mm?

PROBLEMS ON FLUID FLOW IN PIPES 1. What is the hydraulic radius of a rectangular air duct 300mm by 500mm?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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PROBLEMS ON FLUID FLOW IN PIPES 1. What is the hydraulic radius of a rectangular air duct 300mm by 500mm? 2. Air at 1500kPa absolute flows in 25mm-diamter tube. What is the maximum laminar flow rate. Use density of air=14.04kg/cu.m and u=0.0000217Pa-s 3. The flow rate of water through a cast iron pipe is 5000GPM. The diameter of the pipe is 330mm, and the coefficient of friction is f=0.0173. What is the pressure drop over a 30m length of pipe 4. A tube 15m long is to connect two large tanks whose difference in water level is 2m. The tube is to carry 5L/s of flow. What minimum size of tube is necessary to assure laminar flow condition? 5. The water system in a suburban area consists of an old 200mm pipeline 760m long which conveys water from a pump to a reservoir whose water surface is 107m higher than the pump. Water is pumped at the rate of 0.07cu.m/sec. Determine the horsepower saved by replacing the old pipe with a new 250mm pipe. Assume the value of f as equal to 0.033 and 0.022 respectively, for the old and new pipes. Neglect losses of head except friction head.
Transcribed Image Text:PROBLEMS ON FLUID FLOW IN PIPES 1. What is the hydraulic radius of a rectangular air duct 300mm by 500mm? 2. Air at 1500kPa absolute flows in 25mm-diamter tube. What is the maximum laminar flow rate. Use density of air=14.04kg/cu.m and u=0.0000217Pa-s 3. The flow rate of water through a cast iron pipe is 5000GPM. The diameter of the pipe is 330mm, and the coefficient of friction is f=0.0173. What is the pressure drop over a 30m length of pipe 4. A tube 15m long is to connect two large tanks whose difference in water level is 2m. The tube is to carry 5L/s of flow. What minimum size of tube is necessary to assure laminar flow condition? 5. The water system in a suburban area consists of an old 200mm pipeline 760m long which conveys water from a pump to a reservoir whose water surface is 107m higher than the pump. Water is pumped at the rate of 0.07cu.m/sec. Determine the horsepower saved by replacing the old pipe with a new 250mm pipe. Assume the value of f as equal to 0.033 and 0.022 respectively, for the old and new pipes. Neglect losses of head except friction head.
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