Applied Fluid Mechanics
7th Edition
ISBN: 9780133414622
Author: UNTENER
Publisher: YUZU
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Chapter 9, Problem 9.7PP
An alternative scheme for using the velocity probe described in Problem 9.5is to place it in the middle of the pipe, where the velocity is expected to be
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A circular hydrostatic pad thrust bearing of a turbine generator is designed for a thrust load of 10kN. The outside diameter is 100mm and the diameter of recess is 40mm. A pump with constant feed rate of 10mm^3/s is available.
a) Select the absolute viscosity of mineral oil such that film thickness does not drop below 100 μm.b) Calculate the oil pressure in recess.c) Calculate the film stiffness.d) Assuming that the generator running at 750 rpm, calculate the frictional torque absorbed by the bearing.e) Calculate the power loss due to viscous friction and also due to pumping.
(i) Explain briefly how you would determine if the flow in a pipe was certain to be laminar.
(ii) Determine for each of the pipe sizes given as being suitable for the years 2023 to 2123 and show whether the flow would definitely be laminar and if not, show what minimum pipe size would be needed to ensure laminar flow and analyse the efficiency of the flow.
A circular hydrostatic pad thrust bearing of a turbine generator is designed for a thrust load of 10kN. The outside diameter is 100mm and the diameter of recess is 40mm. A pump with constant feed rate of 10mm3/s is available.
a) Select the absolute viscosity of mineral oil such that film thickness does notdrop below 100 μm.b) Calculate the oil pressure in recess.c) Calculate the film stiffness.d) Assuming that the generator running at 750 rpm, calculate the frictional torqueabsorbed by the bearing.e) Calculate the power loss due to viscous friction and also due to pumping.
Chapter 9 Solutions
Applied Fluid Mechanics
Ch. 9 - Compute points on the velocity profile from the...Ch. 9 - s9.2 Compute points on the velocity profile from...Ch. 9 - Compute points on the velocity profile from the...Ch. 9 - Compute points on the velocity profile from the...Ch. 9 - A small velocity probe is to be inserted through a...Ch. 9 - If the accuracy of positioning the probe described...Ch. 9 - An alternative scheme for using the velocity probe...Ch. 9 - Prob. 9.8PPCh. 9 - For the flow of 12.9L/min of water at 75C in a...Ch. 9 - A large pipeline with a 1,200m inside diameter...
Ch. 9 - Prob. 9.11PPCh. 9 - Prob. 9.12PPCh. 9 - Prob. 9.13PPCh. 9 - Prob. 9.14PPCh. 9 - Using Eq. (9-4), compute the ratio of the average...Ch. 9 - Prob. 9.16PPCh. 9 - Repeat Problem 9.16 for the same conditions,...Ch. 9 - Prob. 9.18PPCh. 9 - A shell-and-tube heat exchanger is made of two...Ch. 9 - Figure 9.14 shows a heat exchanger in which each...Ch. 9 - Figure 9.15 shows the cross section of a...Ch. 9 - Air with a specific weight of 12.5N/m3 and a...Ch. 9 - Carbon dioxide with a specific weight of...Ch. 9 - Water at 90F flows in the space between 6 in...Ch. 9 - Refer to the shell-and-tube heat exchanger shown...Ch. 9 - Refer to Fig. 9.14, which shows two DN 150...Ch. 9 - Refer to Fig. 9.15, which shows three pipes inside...Ch. 9 - Water at 10C is flowing in the shell shown in Fig....Ch. 9 - Figure 9.19 shows the cross section of a heat...Ch. 9 - Figure 9.20 shows a liquid-to-air heat exchanger...Ch. 9 - Glycerin ( sg=1.26 ) at 40C flows in the portion...Ch. 9 - Each of the square tubes shown in Fig. 9.21...Ch. 9 - A heat sink for an electronic circuit is made by...Ch. 9 - Figure 9.23 shows the cross section of a cooling...Ch. 9 - Prob. 9.35PPCh. 9 - The blade of a gas turbine engine contains...Ch. 9 - For the system described in Problem 9.24. compute...Ch. 9 - For the shell-and-tube heat exchanger described in...Ch. 9 - For the system described in Problem 9.26 compute...Ch. 9 - For the system described in Problem 9.27 compute...Ch. 9 - For the shell-and-tube heat exchanger described in...Ch. 9 - For the heat exchanger described in Problem 9.29...Ch. 9 - For the glycerin described in Problem 9.31 compute...Ch. 9 - For the flow of water in the square tubes...Ch. 9 - If the heat sink described in Problem 9.33 is 105...Ch. 9 - Compute the energy loss for the flow of water in...Ch. 9 - In Fig. 9.26 ethylene glycol ( sg=1.10 ) at 77F...Ch. 9 - Figure 9.27 shows a duct in which methyl alcohol...Ch. 9 - Prob. 9.49PPCh. 9 - Figure 9.29 shows a system in which methyl alcohol...Ch. 9 - A simple heat exchanger is made by welding...Ch. 9 - Three surfaces of an instrument package are cooled...Ch. 9 - Figure 9.32 shows a heat exchanger with internal...
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