Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 1, Problem 16CP
You are to understand how a reciprocating air compressor (a piston, cylinder device) woks. What system would you use? What type of system is this?
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Chapter 1 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 1 - What is a fluid? How does it differ from a solid?...Ch. 1 - Define internal, external, and open-channel flows.Ch. 1 - Define incompressible flow and in compressible...Ch. 1 - Consider the flow of air over the wings of an...Ch. 1 - What is forced flow? How does it differ from...Ch. 1 - How is the Mach number of a flow defined? That...Ch. 1 - When an airplane is flying at a constant speed...Ch. 1 - Consider the flow of air at a Mach number of 0.12....Ch. 1 - What is the no-slip condition? What causes it?Ch. 1 - What is a boundary layer? What causes a boundary...
Ch. 1 - What is a steady-flow process?Ch. 1 - Define stress, normal stress, shear stress, and...Ch. 1 - What are system, surroundings, and boundary?Ch. 1 - When analyzing the acceleration of gases as they...Ch. 1 - When is a system a closed system, and when is it a...Ch. 1 - You are to understand how a reciprocating air...Ch. 1 - What is the difference between pound-mass and...Ch. 1 - In a news ankle, is stated that a recently...Ch. 1 - Explain why the light-year has the dimension of...Ch. 1 - What is the net force acting on a car cruising at...Ch. 1 - A man goes to a traditional market to buy a steak...Ch. 1 - What is the weight, in N, of an object with a mass...Ch. 1 - What is the weight of a 1-kg substance in N,...Ch. 1 - Determine the mass and the weight of the air...Ch. 1 - A 3-kW resistance heater a water beater...Ch. 1 - A195-Ibm astronaut took his bathroom scale (a...Ch. 1 - The acceleration of high-speed aircraft sometimes...Ch. 1 - A 10-kg rock is thrown upward with a force of 280...Ch. 1 - The value of the gravitational acceleration g...Ch. 1 - At 45° latitude: the gravitational acceleration as...Ch. 1 - 1-32 The gravitational constant g is 9.807m/s2 at...Ch. 1 - On average, an adult person breathes in about 7.0...Ch. 1 - While solving a problem, a person ends up with...Ch. 1 - An airplane flies horizontally at 70m/s . Its...Ch. 1 - If the airplane of Prob. 1-35 weighs 17 lbf,...Ch. 1 - The boom of a fire truck raises a fireman (and his...Ch. 1 - A 6-kg plastic tank that has a volume of 0.18m3 is...Ch. 1 - Water at 15°C from a garden hose fills a 1.5 L...Ch. 1 - A forklift raises a 90.5 kg crate 1.80 m. (a)...Ch. 1 - The gas tank of a car is filled with a nozzle that...Ch. 1 - A pool of volume V (in m3) is to filled with water...Ch. 1 - Based on unit considerations alone, show that the...Ch. 1 - What is the importance of modeling in engineering?...Ch. 1 - What is the difference between the analytical and...Ch. 1 - When modeling an engineering process, how is the...Ch. 1 - What is the difference between precision and...Ch. 1 - How do the differential equations in the study of...Ch. 1 - What is the value of the engineering software...Ch. 1 - The weight of bodies may change somewhat from one...Ch. 1 - The reactive force developed by a jet to push an...Ch. 1 - An important design consideration in two-phase...Ch. 1 - Consider the flow of air through a wind turbine...Ch. 1 - A tank is filled with oil whose density is =850...Ch. 1 - If mass, heat, and work are not allowed to cross...Ch. 1 - The speed of an aircraft is given to be 260 m/s in...Ch. 1 - One J/kg is equal to (a) 1kPam3 (b) 1kNm/kg (c)...Ch. 1 - Which is a unit for power? (a) Btu (b) kwh (c)...Ch. 1 - The speed of an aircraft is given to be 950 km/h....Ch. 1 - The weight of a 10-kg mass at sea level is (a)...Ch. 1 - The weight of a 1 -Ibm mass is (a) 1Ibmft/s2 (b)...Ch. 1 - A hydroelectric power plant operates at its rated...Ch. 1 - Write an essay on the various mass- and...Ch. 1 - Search the Internet to find out how to properly...Ch. 1 - Another unit is kgf, which is a force unit used...Ch. 1 - Discuss why pressure tests of pressurized tanks...
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- Answer the problem correctly and provide complete and readable solutions. If you can explain the process (briefly), please do so. Thank you!arrow_forwardFluid mechanical A large vessel contains compressed air at To = 350 K and Po = 2 bar. A converging-diverging nozzle is attached to the vessel to discharge air. The throat area of the nozzle is 200 cm2. At the exit, the pressure is 20 kPa and the flow is supersonic. Answer the followings: The mass flow rate of the air = Mach number at exit = he exit are = Air velocity at exit Air velocity at throat = Air pressure at throat =arrow_forwardA pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3/s of water? What is the effect of the water temperature on the pump power that is required? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.arrow_forward
- Either the system illustrated below where the fluid considered is water. 1. Calculate: (a) the internal energy (specific), and (b) the mass finally remaining in the volume of Control. 2. In the control volume, what is: (a) the specific internal energy of the saturated steam, (b) The specific internal energy of the saturated liquid, and (c) the (final) temperature? 3 kg. 30 m 100 kPa, 160°C 2 kg, 10 m 100 kPa, 140°C, 200 m/s 3 2 1 kg, 0 m 100 kPa. 100°C, i 1000 m/s ++ Q=9200 kJ mini= 10 kg 100 kPa, x=0.6 min= ? kg 100 kPa, Uin=? +7 kg, 20 m 4 100 kPa, 150°C 8 kg. 0 m 5 100 kPa. 130°C, 100 m/sarrow_forwardQ-1(c): Consider a case in which the air inside the pressurized cabin of a jet transport flying at some altitude of pressure, 0.9 atm and of temperature, 15°C. The total volume of air at any instant inside the cabin is 1800m3. If the air in the cabin is completely recirculated through the air conditioning system every 20 min, calculate the mass flow of air in kg/s through the system. I Answer:arrow_forwardQ.- one kg of am ideal gas (R = 287 K irreversible Process from Stette-0 [1 bur, 300 k] to State - [2 bar, 300k]. The entropy change (S₂-S1) J kg-karrow_forward
- 6- The inlet conditions to a steam nozzle are 10 bar and 250°C. The exit pressure is 2 bar. Assuming isentropic expansion and negligible velocity, determine for 0.2 kg/s of steam: (i) The throat area. (ii) The exit velocity. (iii) The exit area of the nozzle. JAns. (i) 1.44 cm2; (ii) 795 mls; (iii) 2.15 cm2]arrow_forwardA flow of fluid where the density on different states remain the same? A. Compressible Flow B. Incompressible Flow C. Sonic Flow D. Supersonic Flowarrow_forwardQ3. An internal combustion engine consumes 6 kg of fuel per hour, ip of engine is 27 kW and mechanical efficiency is 80%. It uses 12 kg of cooling water per minute and the inlet and outlet temperature of water being 18 °C and 48 °C respectively. The exhaust gases raise the temperature of 8.4 kg/ water through 32 °C. The orific value of fuel used is 44 MJ/kg. Calculate the indicated thermal efficiency, overall efficiency of the engine and draw heat balance sheet.arrow_forward
- Air (R-0.287 kJ/kg.K, c-1.005 kJ/kg.K) is contained in a piston cylinder device, it expands first isothermally (1=>2) thẹn isobaric expansion takes place (2=>3), given the following: v- K. What is the change in entropy (kJ/kg.K) during process 1-2? 0.2 m /kg, v,= 0.53 m /kg, v,-0.74 m /kg, P = 600 kPa, T min = 673 maxarrow_forwardA centrifugal pump uses a 134767 rpm motor to pump 116334 kg/min of standard temperature water and has a pressure rise from 2 bar to 38 bar using a 0.11 cm diameter impeller. The Inlet diameter is 0.39 cm and the outlet diameter is 0.18 cm. The inlet and outlet are at the same level with each other. What will be your water power (in kW)? ?arrow_forwardTask 2.2 A large pressure vessel contains air in state 1 (pi = 3 bar, T1 = 360 K, c1 = 0 m/s). The air flows stationary through an adiabatic laval nozzle (7:D = 0.9) connected to a tank and leaves the nozzle (state 2: p2 = 1 bar, cross-sectional area 42 = 0.1 m²) at supersonic velocity. The air (molar mass M= 28.96 g/mol) can be considered an ideal gas with a constant isentropic exponent x = 1.4. a) Determine the air mass flow through the nozzle. b) Determine the minimum temperature to which the air in the container must be heated up if the temperature of the air at the nozzle outlet has to be kept higher than T2 = 290 K. The pressures pi = 3 bar and p2 = 1 bar remain unchanged. c) Determine the entropy change for the cases a) and b) and give a short explanation for the result.arrow_forward
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