GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Name:Applied Fluid Mechanics
Time:02:00 PM TO 04:00 PM Total Marks: 56
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VI (NEW) EXAMINATION - WINTER 2020
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Subject Code:2160602 Date:22/01/2021Subject Name:Applied Fluid Mechanics
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
| Q.1 | (a) Explain the terms: Pipes in parallel, Pipes in series and Equivalent pipe. | 03 |
| (b) Write the differences between pipe flow and open channel flow. | 04 | |
| (c) Derive Darcy Weisbach formula for the loss of head due to friction in pipe line. | 07 | |
| Q.2 | (a) Define the most economical channel section. Derive the condition for rectangular channel of best section | 03 |
| (b) Derive Chezy’s formula to calculate the velocity in case of a channel. | 04 | |
| (c) Three pipes have been connected between the points A and B. Total discharge between A and B is 200 lt/sec. Physical characteristics of the pipes are, fi=f2=f3=0.02 L1=L2=L3=1000 m --- Content provided by FirstRanker.com --- D1=0.10m, D2=0.20m, D3 =0.30 mCalculate the discharges of each pipe and calculate the head loss between the points'A and B. Draw the energy line of the system. | 07 | |
| Q.3 | (a) Enlist the important applications of Navier-stoke equations | 03 |
| (b) Discuss the phenomenon of boundary layer separation | 04 | |
| (c) Explain with diagram the Specific Energy Curve and Discharge Curve and derive the mathematical expression for minimum specific energy and maximum discharge in terms of depth of flow | 07 | |
| Q.4 | (a) Differentiate between: (1) uniform flow and non-uniform flow (2) laminar flow and turbulent flow | 03 |
| (b) Show that for trapezoidal channel of most economical section (1) half of top width = length of one of the slopping side (2) hydraulic mean depth = ½ depth of flow. | 04 | |
| Q.5 | (a) Explain Froude model law | 03 |
| (b) Compare Impulse turbine and Reaction Turbine. | 04 | |
| (c) What is afflux? Derive the expression for length of Back water curve. | 07 | |
| Q.6 | (a) Explain various types of open channels with sketch | 03 |
| (b) What is cavitation? What are its effects? Give necessary precaution against cavitations in pumps. | 04 | |
| (c) Draw a general layout of a Hydroelectric power plant using an impulse turbine and define the following: 1) Gross Head 2) Net Head 3) Hydraulic Efficiency --- Content provided by FirstRanker.com --- 4) Overall Efficiency of Impulse turbine | 07 | |
| Q.7 | (a) Define: Inertia force, Viscous force and Gravity force. | 03 |
| (b) Explain the efficiencies of turbine. | 04 | |
| (c) Explain the Buckingham’s - theorem for dimensional analysis. | 07 | |
| Q.8 | (a) What are distorted and undistorted models? What are the advantages of using distorted model? | 03 |
| (b) Explain the working of a pelton wheel | 04 | |
| (c) Explain the term hydraulic jump. Derive an expression for the depth of hydraulic jump in terms of the upstream Froude number. | 07 |
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