Fundamentals of Engineering Thermodynamics
8th Edition
ISBN: 9781118412930
Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey
Publisher: WILEY
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Chapter 4.12, Problem 93P
(a)
To determine
The velocity of air exiting the pipe section.
(b)
To determine
The pressure of the air exiting the pipe section.
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Problem (17): water flowing in an open channel of a rectangular cross-section with width (b) transitions from a
mild slope to a steep slope (i.e., from subcritical to supercritical flow) with normal water depths of (y₁) and
(y2), respectively.
Given the values of y₁ [m], y₂ [m], and b [m], calculate the discharge in the channel (Q) in [Lit/s].
Givens:
y1 = 4.112 m
y2 =
0.387 m
b = 0.942 m
Answers:
( 1 ) 1880.186 lit/s
( 2 ) 4042.945 lit/s
( 3 ) 2553.11 lit/s
( 4 ) 3130.448 lit/s
Problem (14): A pump is being used to lift water from an underground
tank through a pipe of diameter (d) at discharge (Q). The total head
loss until the pump entrance can be calculated as (h₁ = K[V²/2g]), h
where (V) is the flow velocity in the pipe. The elevation difference
between the pump and tank surface is (h).
Given the values of h [cm], d [cm], and K [-], calculate the maximum
discharge Q [Lit/s] beyond which cavitation would take place at the
pump entrance. Assume Turbulent flow conditions.
Givens:
h = 120.31 cm
d = 14.455 cm
K = 8.976
Q
Answers:
(1) 94.917 lit/s
(2) 49.048 lit/s
( 3 ) 80.722 lit/s
68.588 lit/s
4
Chapter 4 Solutions
Fundamentals of Engineering Thermodynamics
Ch. 4.12 - Prob. 1ECh. 4.12 - 2. When a drip coffeemaker on-off switch is turned...Ch. 4.12 - Prob. 3ECh. 4.12 - Prob. 4ECh. 4.12 - Prob. 5ECh. 4.12 - Prob. 6ECh. 4.12 - Prob. 7ECh. 4.12 - Prob. 8ECh. 4.12 - Prob. 9ECh. 4.12 - 10. How does the operator of a pumper-tanker fire...
Ch. 4.12 - Prob. 11ECh. 4.12 - Prob. 12ECh. 4.12 - 13. If the expansion valve of a refrigerator...Ch. 4.12 - Prob. 14ECh. 4.12 - Prob. 15ECh. 4.12 - Prob. 1CUCh. 4.12 - 6. Liquid flows at steady state at a rate of 2...Ch. 4.12 - 7. A flow idealized as a throttling process...Ch. 4.12 - 8. __________ is the work associated with the...Ch. 4.12 - 9. Steady flow devices that result in a drop in...Ch. 4.12 - 10. Steam enters a horizontal pipe operating at...Ch. 4.12 - Prob. 11CUCh. 4.12 - Prob. 12CUCh. 4.12 - Prob. 13CUCh. 4.12 - 14. _______ means all properties are unchanging in...Ch. 4.12 - Prob. 15CUCh. 4.12 - Prob. 16CUCh. 4.12 - 17. ________ operation involves state changes with...Ch. 4.12 - Prob. 18CUCh. 4.12 - 19. A horizontal air diffuser operates with inlet...Ch. 4.12 - 20. Mass flow rate for a flow modeled as...Ch. 4.12 - Prob. 21CUCh. 4.12 - Prob. 22CUCh. 4.12 - Prob. 23CUCh. 4.12 - 24. The mechanisms of energy transfer for a...Ch. 4.12 - 25. For one-dimensional flow, mass flow rate is...Ch. 4.12 - 26. At steady state, conservation of mass asserts...Ch. 4.12 - Prob. 27CUCh. 4.12 - Prob. 28CUCh. 4.12 - Prob. 29CUCh. 4.12 - Prob. 30CUCh. 4.12 - Prob. 31CUCh. 4.12 - Prob. 32CUCh. 4.12 - 33. A significant increase in pressure can be...Ch. 4.12 - Prob. 34CUCh. 4.12 - Prob. 35CUCh. 4.12 - Prob. 36CUCh. 4.12 - 37. Factors that may allow one to model a control...Ch. 4.12 - Prob. 38CUCh. 4.12 - Prob. 39CUCh. 4.12 - Prob. 40CUCh. 4.12 - Prob. 41CUCh. 4.12 - Prob. 42CUCh. 4.12 - Prob. 43CUCh. 4.12 - 44. The human body is an example of an integrated...Ch. 4.12 - Prob. 45CUCh. 4.12 - Prob. 46CUCh. 4.12 - 47. The thermodynamic performance of a device such...Ch. 4.12 - 48. For every control volume at steady state, the...Ch. 4.12 - Prob. 49CUCh. 4.12 - Prob. 50CUCh. 4.12 - Prob. 51CUCh. 4.12 - 52. At steady state, identical electric fans...Ch. 4.12 - Prob. 1PCh. 4.12 - Prob. 2PCh. 4.12 - 4.3 Steam enters a 1.6-cm-diameter pipe at 80 bar...Ch. 4.12 - Prob. 4PCh. 4.12 - Prob. 5PCh. 4.12 - Prob. 6PCh. 4.12 - 4.7 Figure P4.7 provides data for water entering...Ch. 4.12 - Prob. 8PCh. 4.12 - Prob. 9PCh. 4.12 - 4.10 Data are provided for the crude oil storage...Ch. 4.12 - 4.11 An 8-ft3 tank contains air at an initial...Ch. 4.12 - Prob. 12PCh. 4.12 - Prob. 13PCh. 4.12 - Prob. 14PCh. 4.12 - 4.15 Liquid water flows isothermally at 20°C...Ch. 4.12 - Prob. 16PCh. 4.12 - Prob. 17PCh. 4.12 - Prob. 18PCh. 4.12 - 4.19 As shown in Fig. P4.19, steam at 80 bar,...Ch. 4.12 - Prob. 20PCh. 4.12 - Prob. 21PCh. 4.12 - Prob. 22PCh. 4.12 - Prob. 23PCh. 4.12 - 4.24 Refrigerant 134a enters a horizontal pipe...Ch. 4.12 - 4.25 As shown in Fig. P4.25, air enters a pipe at...Ch. 4.12 - 4.26 Air enters a horizontal, constant-diameter...Ch. 4.12 - 4.27 Air at 600 kPa, 330 K enters a...Ch. 4.12 - 4.28 At steady state, air at 200 kPa, 325 K, and...Ch. 4.12 - 4.29 Refrigerant 134a flows at steady state...Ch. 4.12 - 4.30 As shown in Fig. P4.30, electronic components...Ch. 4.12 - 4.31 Steam enters a nozzle operating at steady...Ch. 4.12 - 4.32 Refrigerant 134a enters a well-insulated...Ch. 4.12 - 4.33 Air enters a nozzle operating at steady state...Ch. 4.12 - Prob. 34PCh. 4.12 - Prob. 35PCh. 4.12 - 4.36 Nitrogen, modeled as an ideal gas, flows at a...Ch. 4.12 - Prob. 37PCh. 4.12 - Prob. 38PCh. 4.12 - Prob. 39PCh. 4.12 - 4.40 Oxygen gas enters a well-insulated diffuser...Ch. 4.12 - Prob. 41PCh. 4.12 - 4.42 Steam enters a well-insulated turbine...Ch. 4.12 - Prob. 43PCh. 4.12 - 4.44 Air expands through a turbine operating at...Ch. 4.12 - Prob. 45PCh. 4.12 - 4.46 A well-insulated turbine operating at steady...Ch. 4.12 - Prob. 47PCh. 4.12 - Prob. 48PCh. 4.12 - Prob. 49PCh. 4.12 - Prob. 50PCh. 4.12 - Prob. 51PCh. 4.12 - Prob. 52PCh. 4.12 - Prob. 53PCh. 4.12 - 4.54 Nitrogen is compressed in an axial-flow...Ch. 4.12 - Prob. 55PCh. 4.12 - Prob. 56PCh. 4.12 - Prob. 57PCh. 4.12 - Prob. 58PCh. 4.12 - Prob. 59PCh. 4.12 - 4.60 Refrigerant 134a enters an insulated...Ch. 4.12 - Prob. 61PCh. 4.12 - Prob. 62PCh. 4.12 - 4.63 Air enters a compressor operating at steady...Ch. 4.12 - 4.64 Air enters a compressor operating at steady...Ch. 4.12 - Prob. 65PCh. 4.12 - Prob. 66PCh. 4.12 - Prob. 67PCh. 4.12 - 4.68 As shown in Fig. P4.68, a power washer used...Ch. 4.12 - Prob. 69PCh. 4.12 - Prob. 70PCh. 4.12 - Prob. 71PCh. 4.12 - 4.72 Oil enters a counterflow heat exchanger at...Ch. 4.12 - Prob. 73PCh. 4.12 - Prob. 74PCh. 4.12 - Prob. 75PCh. 4.12 - Prob. 76PCh. 4.12 - Prob. 77PCh. 4.12 - Prob. 78PCh. 4.12 - Prob. 79PCh. 4.12 - Prob. 80PCh. 4.12 - Prob. 83PCh. 4.12 - Prob. 84PCh. 4.12 - Prob. 85PCh. 4.12 - Prob. 86PCh. 4.12 - Prob. 87PCh. 4.12 - Prob. 88PCh. 4.12 - Prob. 89PCh. 4.12 - Prob. 90PCh. 4.12 - Prob. 91PCh. 4.12 - Prob. 92PCh. 4.12 - Prob. 93PCh. 4.12 - Prob. 94PCh. 4.12 - Prob. 95PCh. 4.12 - Prob. 96PCh. 4.12 - 4.97 As shown in Fig. P4.97, Refrigerant 22 enters...Ch. 4.12 - Prob. 98PCh. 4.12 - Prob. 99PCh. 4.12 - Prob. 100PCh. 4.12 - Prob. 101PCh. 4.12 - 4.102 Steady-state operating data for a simple...Ch. 4.12 - Prob. 103PCh. 4.12 - Prob. 104PCh. 4.12 - Prob. 105PCh. 4.12 - Prob. 106PCh. 4.12 - Prob. 107PCh. 4.12 - Prob. 108PCh. 4.12 - Prob. 109PCh. 4.12 - Prob. 110PCh. 4.12 - Prob. 111PCh. 4.12 - Prob. 112PCh. 4.12 - 4.113 An insulated, rigid tank whose volume is 10...Ch. 4.12 - Prob. 114PCh. 4.12 - Prob. 115PCh. 4.12 - Prob. 116PCh. 4.12 - Prob. 117PCh. 4.12 - Prob. 119PCh. 4.12 - Prob. 122PCh. 4.12 - Prob. 127PCh. 4.12 - Prob. 128PCh. 4.12 - 4.130 The procedure to inflate a hot-air balloon...
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- Problem (13): A pump is being used to lift water from the bottom tank to the top tank in a galvanized iron pipe at a discharge (Q). The length and diameter of the pipe section from the bottom tank to the pump are (L₁) and (d₁), respectively. The length and diameter of the pipe section from the pump to the top tank are (L2) and (d2), respectively. Given the values of Q [L/s], L₁ [m], d₁ [m], L₂ [m], d₂ [m], calculate total head loss due to friction (i.e., major loss) in the pipe (hmajor-loss) in [cm]. Givens: L₁,d₁ Pump L₂,d2 오 0.533 lit/s L1 = 6920.729 m d1 = 1.065 m L2 = 70.946 m d2 0.072 m Answers: (1) 3.069 cm (2) 3.914 cm ( 3 ) 2.519 cm ( 4 ) 1.855 cm TABLE 8.1 Equivalent Roughness for New Pipes Pipe Riveted steel Concrete Wood stave Cast iron Galvanized iron Equivalent Roughness, & Feet Millimeters 0.003-0.03 0.9-9.0 0.001-0.01 0.3-3.0 0.0006-0.003 0.18-0.9 0.00085 0.26 0.0005 0.15 0.045 0.000005 0.0015 0.0 (smooth) 0.0 (smooth) Commercial steel or wrought iron 0.00015 Drawn…arrow_forwardThe flow rate is 12.275 Liters/s and the diameter is 6.266 cm.arrow_forwardAn experimental setup is being built to study the flow in a large water main (i.e., a large pipe). The water main is expected to convey a discharge (Qp). The experimental tube will be built at a length scale of 1/20 of the actual water main. After building the experimental setup, the pressure drop per unit length in the model tube (APm/Lm) is measured. Problem (20): Given the value of APm/Lm [kPa/m], and assuming pressure coefficient similitude, calculate the drop in the pressure per unit length of the water main (APP/Lp) in [Pa/m]. Givens: AP M/L m = 590.637 kPa/m meen Answers: ( 1 ) 59.369 Pa/m ( 2 ) 73.83 Pa/m (3) 95.443 Pa/m ( 4 ) 44.444 Pa/m *******arrow_forward
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