Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 18, Problem 18.37PP
To determine
The minimum pressure required to produce sonic velocity.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Consider a centrifugal pump with curved blades has blade angle at the outlet
section equal to 30o, and no shock/no swirl at inlet. Construct the velocity
diagrams of this blade at inlet and outlet sections.
2)
flow is exhausted from the nozzle exit at standard sea level conditions with a velocity of 50
m/s, calculate the height difference in a U-tube mercury manometer with one side connected
Consider the nozzle of a subsonic turbojet with contraction ratio of 2:1. If the jet
to the nozzle inlet and the nozzle exit.
The velocity of steam at inlet to a simple impulse turbine is 1000 mys, and the mzle 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 regligible,
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 diagramefficiency?
If the relative velocity at exit is recuced 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.
Chapter 18 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 18 - A pipe in a compressed air system is carrying 2650...Ch. 18 - Prob. 18.2PPCh. 18 - Prob. 18.3PPCh. 18 - A duct in a heating system carries 8320 cfm....Ch. 18 - The velocity of flow in a ventilation duct is 1140...Ch. 18 - Prob. 18.6PPCh. 18 - Prob. 18.7PPCh. 18 - Prob. 18.8PPCh. 18 - Prob. 18.9PPCh. 18 - Prob. 18.10PP
Ch. 18 - Prob. 18.11PPCh. 18 - Describe a centrifugal fan with forward-curved...Ch. 18 - Prob. 18.13PPCh. 18 - Prob. 18.14PPCh. 18 - Name four types of positive-displacement...Ch. 18 - Name a type of compressor often used for pneumatic...Ch. 18 - Prob. 18.17PPCh. 18 - Prob. 18.18PPCh. 18 - Prob. 18.19PPCh. 18 - Compute the specific weight of nitrogen at 32...Ch. 18 - Compute the specific weight of air at 1260...Ch. 18 - Prob. 18.22PPCh. 18 - An air compressor delivers 820 cfm of free air....Ch. 18 - Prob. 18.24PPCh. 18 - Prob. 18.25PPCh. 18 - Prob. 18.26PPCh. 18 - Specify a size of Schedule 40 steel pipe suitable...Ch. 18 - For an aeration process, a sewage treatment plant...Ch. 18 - Prob. 18.29PPCh. 18 - Prob. 18.30PPCh. 18 - Prob. 18.31PPCh. 18 - Prob. 18.32PPCh. 18 - Prob. 18.33PPCh. 18 - Prob. 18.34PPCh. 18 - Prob. 18.35PPCh. 18 - Figure 18.14 iD shows a two-compartment vessel....Ch. 18 - Prob. 18.37PPCh. 18 - Prob. 18.38PPCh. 18 - Prob. 18.39PPCh. 18 - A tank of Refrigerant is at 150 kPa gage and 20C....Ch. 18 - Prob. 18.41PP
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
- 5. A wind tunnel consists of an entry contraction, a constant-area working section of area 0.5 m?, a diffuser and a fan of area 1 m?, as shown in Fig. 2. The air is pulled from the atmosphere through the contraction into the working section where its speed is 20 m/s, and from there it flows through the diffuser into the fan, which returns it to the atmosphere. Calculate the static and stagnation pressures at: a. The working section b. The inlet to the fan C. The exit from the fan, assuming no change in air speed across the fan. d. Calculate the power supplied by the fan to the air. Fan V = 20 m/s Working section Diffuser Contraction Figure 2arrow_forwardThe velocity of steam existing the nozzle of the impulse turbine is 400m/s. The blades operate close to the maximum blading efficiency and the speed ratio is 0.45. The nozzle angle is 20o. Considering equiangular blades and neglecting blade friction, calculate the power for a steam flow of 0.6 kg/s.arrow_forwardQ1: A converging-diverging frictionless nozzle is used to accelerate an airstream emanating from a large chamber. The nozzle has an exit area of 30cm² and a throat area of 15cm². If the chamber temperature is 500K, and the back pressure is 101kPa, calculate the following: a. Minimunt chamber pressure (po) to choke the nozzle. b. Mass flow rate for a chamber pressure (po) of 400kPa. c. Mass flow rate for a chamber pressure (po) of 105kPa.arrow_forward
- The velocity of steam at inlet to a simple impulse turbine is 1000 m/s, and the nozzle angle is 20o. 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_forwardA gas turbine stage develops 3.4MW for a mass flow of 27 kg/sec. The stagnation pressure and temperature at the stage entry are 772 kPa and 100OK. The axial velocity is constant throughout the stage, the gases entering and leaving the stage without any absolute whirl. At the nozzle exit, the static pressure is 480kPa and the flow direction is at 72°. Let C,=1.148, R=0.287. Determine the following: a) the axial velocity, b) the degree of reaction for the stage given that the entropy increase in the nozzles is 13 J/(kg °C),arrow_forward3. Assume the turbine as an incompressible flow machine. The average meridional speed is given as 150m/s. The flow coefficient is 0.5. Determine the blade speed that satisfies the above conditions.4. In a two-dimensional compressor cascade, inlet stagnation air pressure is 1.5 bar and inlet stagnation temperature is 330K. For an inlet Mach number of 0.75 and an inlet flow angle of 500, the exit flow angle is measured as 15.80. Determine the mass flow rate per unit frontal area, the exit Mach number and the static pressure ratio across the cascade. Assume the flow is isentropic.arrow_forward
- (6) A nozzle is required to pass 1.5 kg/s of air. The inlet conditions are a zero velocity, a pressure of 350 kPa and a temperature of 425°C. If the air is to expand to 140 kPa, determine the throat area required. Also calculate the exit velocity and exit area if the nozzle efficiency is 95 %. Assume that friction takes place in the diverging part only.arrow_forward3. At 200C and 98kPaa existing barometric pressure, fan develops a brake power of 95kW. If operates at 95kPaa and 320C with the same speed, what is the new break power of the fan? 4. An mixed flow centrifugal blower having a flow capacity of 4500cfm has a suction and discharge diameter of 24in and 20in respectively. The manometer reading at the suction and discharge line are measured to be 10in-Hg vacuum and 20in-Hg. If the existing barometric conditions are 14.3psia and 550F, determine the required horsepower of the blower motor if the rated efficiency of the fan is 89%.arrow_forwardQ5: A converging-diverging nozzle, which is shown in the figure, is supplied with air from a large tank where the pressure is Po and exhausts to the atmosphere with a pressure of Po. The area A at distance x from the throat is given by (A = At (1 + 0.75x/L)), where At is the throat cross- sectional area and Lis the total length of the diverging part of the nozzle. At a certain pressure ratio PoPb, a normal shock wave stands in the nozzle at a point where the Mach number before the shock is 1.7. Find the position of the normal shock wave from the throat, and the pressure ratio P/Po. Ans.: 0.45 L = 0.753 Р. Psarrow_forward
- The speed of rotation of a blade group of a reaction turbine is 3000 rev/min. The mean blade velocity is 100 m/s. The blade speed ratio is 0.56 and the exit angle of the blades is 20°. If the mean specific volume of the steam is 0.65 m'/kg, and the mean height of the blades is 25 mm, calculate the mass flow of steam through the turbine. Neglect the cffect of blade thick ness on the annulus area, and assume 50% reaction blading. (16 900 kg/h) 397arrow_forward7- Dry saturated steam is passed at 7 bar through a convergent-divergent nozzle. The throat cross- sectional area is 4.5 cm2. Find the mass of steam passing through the nozzle per minute.arrow_forwardAir 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_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
Intro to Compressible Flows — Lesson 1; Author: Ansys Learning;https://www.youtube.com/watch?v=OgR6j8TzA5Y;License: Standard Youtube License