FLUID MECHANICS FUND. (LL)-W/ACCESS
4th Edition
ISBN: 9781266016042
Author: CENGEL
Publisher: MCG CUSTOM
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 6, Problem 79EP
To determine
(a)
The exit velocity of air.
To determine
(b)
The volumetric flow rate.
To determine
(c)
The minimum
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A Boeing 777-200 commercial jet weighs, fully loaded, 325,000 kg. The pilot places the turbines in maximum power condition for takeoff (before releasing the aircraft's brakes), situation in which they generate 450 kN of thrust in each turbine. Neglecting aerodynamic and bearing, estimate runway length and time necessary to achieve the speed of takeoff of 225 km / h. consider constant thrust in the two turbines during the journey on the ground.
Q4 see photo provided.
The first compressor blade pair in a turbojet is to be designed with symmetric blading. If the inflow to the compressor has a gas speed measured as 108m/s, for this speed the shaft is designed to rotate at 262rad/s, and the mean blade radius of this first blade row is 0.51m, to what angle should the first stator be set? Express your answer in degrees.
Chapter 6 Solutions
FLUID MECHANICS FUND. (LL)-W/ACCESS
Ch. 6 - Express Newton’s second law of motion for rotating...Ch. 6 - Express Newton’s first, second, and third laws.Ch. 6 - Is momentum a vector? If so, in what direction...Ch. 6 - Express the conservation of momentum principle....Ch. 6 - How do surface forces arise in the momentum...Ch. 6 - Explain the importance of the Reynolds transport...Ch. 6 - What is the importance of the momentum-flux...Ch. 6 - Write the momentum equation for steady...Ch. 6 - In the application of the momentum equation,...Ch. 6 - Two firefighters are fighting a fire with...
Ch. 6 - A rocket in space (no friction or resistance to...Ch. 6 - Describe in terms of momentum and airflow how a...Ch. 6 - Does it take more, equal, or less power for a...Ch. 6 - In a given location, would a helicopter require...Ch. 6 - Describe body forces and surface forces, and...Ch. 6 - A constant-velocity horizontal water jet from a...Ch. 6 - A horizontal water jet of constant velocity V from...Ch. 6 - A horizontal water jet from a nozzle of constant...Ch. 6 - A 2.5-cm-diameter horizontal water jet with a...Ch. 6 - A 90 elbow in a horizontal pipe is used to direct...Ch. 6 - Repeat Prob. 6-20 for the case of another...Ch. 6 - A horizontal water jet impinges against a vertical...Ch. 6 - Water enters a 7-cm-diameter pipe steadily with a...Ch. 6 - A reducing elbow in a horizontal pipe is used to...Ch. 6 - Repeat Prob. 6-24 for the case of = 125°.Ch. 6 - A 100-ft3/s water jet is moving in the positive...Ch. 6 - Reconsider Prob. 6-26E. Using appropriate...Ch. 6 - Commercially available large wind turbines have...Ch. 6 - A fan with 24-in-diameter blades moves 2000 cfm...Ch. 6 - A 3-in-diameter horizontal jet of water, with...Ch. 6 - Firefighters are holding a nozzle at the end of a...Ch. 6 - A 5-cm-diameter horizontal jet of water with a...Ch. 6 - Prob. 33PCh. 6 - A 3-in-diameter horizontal water jet having a...Ch. 6 - An unloaded helicopter of mass 12,000 kg hovers at...Ch. 6 - Prob. 36PCh. 6 - Water is flowing through a 10-cm-diameter water...Ch. 6 - Water flowing in a horizontal 25-cm-diameter pipe...Ch. 6 - Prob. 39PCh. 6 - Water enters a centrifugal pump axially at...Ch. 6 - An incompressible fluid of density and viscosity ...Ch. 6 - Consider the curved duct of Prob. 6-41, except...Ch. 6 - As a follow-up to Prob. 6-41, it turns out that...Ch. 6 - Prob. 44PCh. 6 - The weight of a water tank open to the atmosphere...Ch. 6 - A sluice gate, which controls flow rate in a...Ch. 6 - A room is to be ventilated using a centrifugal...Ch. 6 - How is the angular momentum equation obtained from...Ch. 6 - Prob. 49CPCh. 6 - Prob. 50CPCh. 6 - Prob. 51CPCh. 6 - A large lawn sprinkler with two identical arms is...Ch. 6 - Prob. 53EPCh. 6 - The impeller of a centrifugal pump has inner and...Ch. 6 - Water is flowing through a 15-cm-diameter pipe...Ch. 6 - Prob. 56PCh. 6 - Repeat Prob. 6-56 for a water flow rate of 60 L/s.Ch. 6 - Prob. 58PCh. 6 - Water enters the impeller of a centrifugal pump...Ch. 6 - A lawn sprinkler with three identical antis is...Ch. 6 - Prob. 62PCh. 6 - The impeller of a centrifugal blower has a radius...Ch. 6 - An 8-cm-diameter horizontal water jet having a...Ch. 6 - Water flowing steadily at a rate of 0.16 m3/s is...Ch. 6 - Repeat Prob. 6-66 by taking into consideration the...Ch. 6 - A 16-cm diameter horizontal water jet with a speed...Ch. 6 - Water enters vertically and steadily at a rate of...Ch. 6 - Repeal Prob. 6-69 for the case of unequal anus-the...Ch. 6 - Prob. 71PCh. 6 - Prob. 72PCh. 6 - A spacecraft cruising in space at a constant...Ch. 6 - A 60-kg ice skater is standing on ice with ice...Ch. 6 - A 5-cm-diameter horizontal jet of water, with...Ch. 6 - Water is flowing into and discharging from a pipe...Ch. 6 - Indiana Jones needs So ascend a 10-m-high...Ch. 6 - Prob. 79EPCh. 6 - A walnut with a mass of 50 g requires a force of...Ch. 6 - Prob. 81PCh. 6 - Prob. 82PCh. 6 - A horizontal water jet of constant velocity V...Ch. 6 - Show that the force exerted by a liquid jet on a...Ch. 6 - Prob. 85PCh. 6 - Prob. 86PCh. 6 - Water enters a mixed flow pump axially at a rate...Ch. 6 - Prob. 88PCh. 6 - Water enters a two-armed lawn sprinkler along the...Ch. 6 - Prob. 91PCh. 6 - Prob. 92PCh. 6 - Prob. 93PCh. 6 - Prob. 94PCh. 6 - A water jet strikes a moving plate at velocity...Ch. 6 - Water flows at mass flow rate m through a 90°...Ch. 6 - Prob. 97PCh. 6 - Water shoots out of a Iar2e tank sitting a cart...Ch. 6 - Prob. 99PCh. 6 - Prob. 100PCh. 6 - Prob. 101PCh. 6 - Consider water flow through a horizontal, short...Ch. 6 - Consider water flow through a horizontal. short...Ch. 6 - Prob. 104PCh. 6 - Prob. 105PCh. 6 - Prob. 106PCh. 6 - The velocity of wind at a wind turbine is measured...Ch. 6 - The ve1ocity of wind at a wind turbine is measured...Ch. 6 - Prob. 109PCh. 6 - Prob. 110PCh. 6 - Prob. 111PCh. 6 - Consider the impeller of a centrifugal pump with a...Ch. 6 - Prob. 113PCh. 6 - Prob. 114P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- In Fig. 1, the box-fan of weight 22 N is hovering in the air. The air approaches the blades from the top with a negligible velocity and leaves the blades at a uniform velocity at the atmospheric pressure. The diameter of the blade span area is 0.9 m. Determine (a) The air exit velocity to produce 22 N force.(b) The volume flow rate needed.(c) The minimum power that must be supplied to the airstream.Take the air density to be 1.25 kg/m3.arrow_forward4. A 16.50 ft. diameter by 32.8 ft. height tank is receiving water (p = 62.3 lbs/ft³) at the rate of 405 GPM and is discharging through a 6.0 in. ID Line with a constant velocity of 5.36 ft/sec. At given instant the tank is half full. Find the water level and mass change in the tank 29 minutes later. Ans. 13.366 ft; 40,415 lbs.arrow_forward1. Endurance is defined as the maximum time the aircraft can stay in the air. Show that in order to achieve endurance, an aircraft driven by a turbo jet has to fly at minimum drag speed, i.e. V = VEmd, while a propeller driven aircraft should fly at a speed of minimum required power. You may assume both engines are ideal and account only for the steady level flight phase. (Hint: For a turbo jet SFC is the ratio of the mass flow rate with the net thrust and for propeller engine SFC is the ratio of the mass flow rate with the engine's power)arrow_forward
- Air flows through a turbojet engine at the rate of 50.0 kg/s and the fuel flow rate is 1.0 kg/s. The exhaust gases leave the jet nozzle with a relative velocity of 600 m/s. Compute the velocity of the airplane, if the thrust power is 1.5 MW in the following two cases: 1. Pressure equilibrium exists ver the exit plane 2. If the pressure thrust is 8 kNarrow_forwardThe propeller on an airboat used in the Florida Everglades moves air at the rate of 40 kg/s. When at rest, the speed of the slipstream behind the propeller is 40 m/s ata location where the pressure is atmospheric. Calculate (@) the propeller diameter, (b) the thrust produced at rest, and () the thrust produced when the airboat is moving ahead at 10 m/s, if the mass flow rate through the propeller remains constant,arrow_forwardThe velocity of steam at inlet to a simple impulse turbine is 1000 m's, and the nozzle angle is 20°. The blade speed is 400 m/s and the blades are symmetrical. Determine the blade angles if the steam is to enter the blades without shock. If the friction effect s on the blade is negligible, calculate the tangential force on the blades and the diagram power for a mass flow of 0.75 kg/s. What is the axial thrust and the diagram efficiency? If the relative velocity at exit is reduced by friction to 80% of that at inlet, what is then the diagram power and the axial thrust? Calculate also the diagram efficiency in this case.arrow_forward
- I need the answer as soon as possiblearrow_forwardUnder elestic condition, calculate the ave. forge and pressure of a closed window when a 500 water ice having a mass of 5 g moving at speed of 5 m/sec which will be hit on the window area of 0.6 sq.m for 30 sec at 45 deg. angle?arrow_forwardA fan is to be used as a levitation demonstration. The air blows through the box-enclosed fan of 3 ft diameter blade span area. The weight of the system is 69 lbf. The box is tied up to stop it from rotating. The air velocity is increased by increasing the RPM of fan to create lift. Determine (a) the air exit velocity to produce lift of the system (b) the volumetric flow rate needed, and (c) the minimum mechanical power that must be supplied to the airstream. Take the air density to be 0.078 lbm/ft3.arrow_forward
- QUESTION 1 A jet of freshwater strikes a series of vanes of a turbine at 25° with the direction of motion and leaves it at 150° absolute with the direction of motion. The absolute inlet velocity of the jet is 25 m/s and the vanes move at a velocity of 10 m/s. Ignore friction across the vanes. Calculate: 1.1 the vane inlet angle. 1.2 the vane outlet angle. 1.3 the power/kg of water and, 1.4 the hydraulic efficiency. QUESTION 2 A pipeline of 50 mm diameter and 4.5 km length connects two reservoirs whose constant difference of water level is 12 m. A branch pipe 1.25 km long and taken from a point distance of 1.5 km from reservoir A, leads to reservoir C whose water level is 15 m below that of reservoir A. Find the diameter of the branch pipe so that the flow into both the reservoirs is the same. Assume the coefficient of friction for each pipe, f = 0.0075, and neglect minor losses. QUESTION 3 The plunger diameter of a single-acting reciprocating pump is 115 mm and the stroke is 230 mm.…arrow_forwardNonearrow_forwardNearly frictionless vertical guide rails maintain a plate of mass mp in a horizontal position, such that it can slide freely in the vertical direction. A nozzle directs a water stream of area A against the plate underside. The water jet splatters in the plate plane, applying an upward force against the plate. The water flow rate m. (kg/s) can be controlled. Assume that distances are short, so the velocity of the rising jet can be considered constant with height. (a) Determine the minimum mass flow rate m. min necessary to just levitate the plate and obtain a relation for the steady-state velocity of the upward moving plate for m. > m. min. (b) At time t = 0, the plate is at rest, and the water jet with m . > m . min is suddenly turned on. Apply a force balance to the plate and obtain the integral that relates velocity to time (do not solve).arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Hydronics Step by Step; Author: Taco Comfort Solutions;https://www.youtube.com/watch?v=-XGNl9kppR8;License: Standard Youtube License