Fluid Mechanics Fundamentals And Applications
3rd Edition
ISBN: 9780073380322
Author: Yunus Cengel, John Cimbala
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 14, Problem 147P
To determine
The tube name from where the water flows through a dam in a hydroelectric power plant.
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The wall of a furnace has a thickness of 5 cm and thermal conductivity
of 0.7 W/m-°C. The inside surface is heated by convection with a hot
gas at 402°C and a heat transfer coefficient of 37 W/m²-°C. The
outside surface has an emissivity of 0.8 and is exposed to air at 27°C
with a heat transfer coefficient of 20 W/m²-ºC. Assume that the
furnace is inside a large room with walls, floor and ceiling at 27°C.
Show the thermal circuit and determine the heat flux through the
furnace wall.
h₁
T₁
k
-L
T.
sur
ho
E
Turbomachienery .
GIven:
vx = 185 m/s, flow angle = 60 degrees, R = 0.5, U = 150 m/s, b2 = -a3, a2 = -b3
Find: velocity triangle , a. magnitude of abs vel leaving rotor (m/s) b. flow absolute angles (a1, a2, a3) 3. flow rel angles (b2, b3) d. specific work done e. use code to draw vel. diagram
Use this code for plot
% plots Velocity Tri. in Ch4
function plotveltri(al1,al2,al3,b2,b3)
S1L = [0 1];
V1x = [0 0];
V1s = [0 1*tand(al3)];
S2L = [2 3];
V2x = [0 0];
V2s = [0 1*tand(al2)];
W2s = [0 1*tand(b2)];
U2x = [3 3];
U2y = [1*tand(b2) 1*tand(al2)];
S3L = [4 5];
V3x = [0 0];
V3r = [0 1*tand(al3)];
W3r = [0 1*tand(b3)];
U3x = [5 5];
U3y = [1*tand(b3) 1*tand(al3)];
plot(S1L,V1x,'k',S1L,V1s,'r',...
S2L,V2x,'k',S2L,V2s,'r',S2L,W2s,'b',U2x,U2y,'g',...
S3L,V3x,'k',S3L,V3r,'r',S3L,W3r,'b',U3x,U3y,'g',......
'LineWidth',2,'MarkerSize',10),...
axis([-1 6 -4 4]), ...
title('Velocity Triangle'), ...
xlabel('x'),ylabel('y'), grid
To save fuel during the heating season it is suggested that glass windows
be covered at night with a 1.2 cm layer of polystyrene. Estimate the
percent savings in energy and discuss the feasibility of this idea. Show
the thermal circuit with and without the insulation panel. Consider a typical
case of 0.2 cm thick window glass with inside and outside heat transfer
coefficients of 6 and 32 W/m²-ºC.
Lg←←Lp
h
T₁
T。
g
kp
insulation panel
Chapter 14 Solutions
Fluid Mechanics Fundamentals And Applications
Ch. 14 - List at least two common examples of fans, of...Ch. 14 - What are the primary differences between fans,...Ch. 14 - Prob. 3CPCh. 14 - Explain why there is an “extra” term in the...Ch. 14 - Explain why there is an “extra” term in the...Ch. 14 - Prob. 6CPCh. 14 - Prob. 7CPCh. 14 - An air compressor increases the pressure (PoutPin)...Ch. 14 - Prob. 9PCh. 14 - Prob. 10CP
Ch. 14 - Prob. 11CPCh. 14 - Prob. 12CPCh. 14 - There are three main categories of dynamic pumps....Ch. 14 - Consider flow through a water pump. For each...Ch. 14 - Prob. 15CPCh. 14 - Prob. 16CPCh. 14 - Prob. 17CPCh. 14 - Prob. 18CPCh. 14 - Prob. 19CPCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Consider the flow system sketched in Fig....Ch. 14 - Prob. 24PCh. 14 - Repeat Prob. 14-25, but with a rough pipe-pipe...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - Suppose the pump of Probs. 14-29 and 14-30 is used...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - Prob. 32PCh. 14 - Prob. 34PCh. 14 - The performance data of a water pump follow the...Ch. 14 - For the application at hand, the how rate of Prob....Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - For the pump and piping system of Prob. 14-35E,...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - Calculate the volume flow rate between the...Ch. 14 - Comparing the resu1t of Probs. 14—43 and 14—47,the...Ch. 14 - Repeat Prob. 14—43, but neglect all minor losses....Ch. 14 - A local ventilation system (a hood and duct...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - Transform each column of the pump performance data...Ch. 14 - A local ventilation system (a hood and duct...Ch. 14 - For the duct system and fan of Prob. 14—55E,...Ch. 14 - Repeat Prob. 14—55E. Ignoring all minor losses....Ch. 14 - 14-51 A local ventilation system (a hood and duct...Ch. 14 - The two-lobe rotary pump of Fig. P14-63E moves...Ch. 14 - Prob. 64EPCh. 14 - Prob. 65PCh. 14 - Prob. 66PCh. 14 - A centrifugal pump rotates at n=750rpm . Water...Ch. 14 - Prob. 68PCh. 14 - Suppose the pump of Prob. I 4—67 has some reverse...Ch. 14 - Prob. 70PCh. 14 - Prob. 71PCh. 14 - Prob. 72PCh. 14 - Prob. 73CPCh. 14 - Name and briefly describe the differences between...Ch. 14 - Discuss the meaning of reverse swirl in reaction...Ch. 14 - Prob. 76CPCh. 14 - Prob. 77PCh. 14 - Prob. 78PCh. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - Prob. 81PCh. 14 - Wind (=1.204kg/m3) blows through a HAWT wind...Ch. 14 - Prob. 83PCh. 14 - Prob. 85PCh. 14 - Prob. 86EPCh. 14 - Prob. 88PCh. 14 - Prob. 89PCh. 14 - Prob. 90EPCh. 14 - The average wind speed at a proposed HAWT wind...Ch. 14 - Prob. 92CPCh. 14 - Prob. 93CPCh. 14 - Discuss which dimensionless pump performance...Ch. 14 - Prob. 95PCh. 14 - Prob. 96PCh. 14 - Prob. 97PCh. 14 - Prob. 98PCh. 14 - Prob. 99PCh. 14 - Prob. 100PCh. 14 - Prob. 101PCh. 14 - Prob. 102PCh. 14 - Prob. 103PCh. 14 - Prob. 104PCh. 14 - Prob. 105PCh. 14 - Prob. 106PCh. 14 - Prob. 107PCh. 14 - Prob. 108PCh. 14 - Prob. 109PCh. 14 - Prob. 110PCh. 14 - Prob. 111PCh. 14 - Prob. 112PCh. 14 - Prob. 114PCh. 14 - Prob. 115PCh. 14 - Prove that the model turbine (Prob. 14—114) and...Ch. 14 - In Prob. 14—116, we scaled up the model turbine...Ch. 14 - Prob. 118PCh. 14 - Prob. 119PCh. 14 - Prob. 120PCh. 14 - For two dynamically similar pumps, manipulate the...Ch. 14 - Prob. 122PCh. 14 - Prob. 123PCh. 14 - Prob. 124PCh. 14 - Calculate and compare the turbine specific speed...Ch. 14 - Which turbomachine is designed to deliver a very...Ch. 14 - Prob. 127PCh. 14 - Prob. 128PCh. 14 - Prob. 129PCh. 14 - Prob. 130PCh. 14 - Prob. 131PCh. 14 - Prob. 132PCh. 14 - Prob. 133PCh. 14 - Prob. 134PCh. 14 - Prob. 135PCh. 14 - Prob. 136PCh. 14 - Prob. 137PCh. 14 - The snail-shaped casing of centrifugal pumps is...Ch. 14 - Prob. 139PCh. 14 - Prob. 140PCh. 14 - Prob. 141PCh. 14 - Prob. 142PCh. 14 - Prob. 143PCh. 14 - Prob. 144PCh. 14 - Prob. 145PCh. 14 - Prob. 146PCh. 14 - Prob. 147PCh. 14 - Prob. 148PCh. 14 - Prob. 149PCh. 14 - Prob. 150PCh. 14 - Prob. 151PCh. 14 - Prob. 152P
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