[2] A cheap radial-vaned centrifugal fan is required to provide a supply of pressurised air to a furnace. The specification requires that the fan produce a total pressure rise equivalent to 8 cm of water at a volume flow rate of 0.3 m/s. The fan impeller is fabricated from 30 thin sheet metal vanes, the ratio of the passage width to circumferential pitch at impeller exit being specified as 0.5 and the ratio of the radial velocity to blade tip speed as 0.1. Assuming that the overall isentropic efficiency of the fan is 0.8 and that the slip can be estimated from Stanitz's expression, eqn. (7.18a), determine (i) the vane tip speed; (ii) the rotational speed and diameter of the impeller; (iii) the power required to drive the fan if the mechanical efficiency is 0.94; (iv) the specific speed.

[2] A cheap radial-vaned centrifugal fan is required to provide a supply of pressurised air to a furnace. The specification requires that the fan produce a total pressure rise equivalent to 8 cm of water at a volume flow rate of 0.3 m/s. The fan impeller is fabricated from 30 thin sheet metal vanes, the ratio of the passage width to circumferential pitch at impeller exit being specified as 0.5 and the ratio of the radial velocity to blade tip speed as 0.1. Assuming that the overall isentropic efficiency of the fan is 0.8 and that the slip can be estimated from Stanitz's expression, eqn. (7.18a), determine (i) the vane tip speed; (ii) the rotational speed and diameter of the impeller; (iii) the power required to drive the fan if the mechanical efficiency is 0.94; (iv) the specific speed.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: 1. At 101.325 Kpa and 21°C, an industrial fan develops a brake power of 100KW and head of 120mm…

Q: Using the situation below, how would I determine the net resultant force exerted on the reducer by…

A: Given Data The diameter of the pipe is: d=25 cm The velocity of the water is: v=8 m/s The pressure…

Q: Air enters a 3-cm-diameter pipe 15 m long at V1 = 73 m/s,p1 = 550 kPa, and T1 = 60 °C. The friction…

A: Given Diameter pipe D = 3 cm Pipe length L = 15m Velocity V1= 73m/s Pressure p1 = 550 kPa…

Q: Water is flowing steadily through a closed pipe system of constant diameter. Station 2 is 1 m higher…

A: Given data: The height of station 2 is, z2 = 1 m. The velocity at station 1 is, v1 = 3 m/s. The…

Q: A frictionless convergent-divergent channel is used to accelerate the airflow emanating from the…

Q: A Pelton turbine is required to work under a head of 40 m to develop 150 kW at 250 r.p.m. Assuming:…

A: Given that, H=40 m, P=150 kW, N=250 rpm, Cv=0.98, Ku=0.46 Mechanical efficiency, ηm=96 %=0.96,…

Q: QUESTION 2 A compressor blade design tested in a cascade is found to choke with an inlet Mach number…

A: Refer the compressible flow tables,

Q: Prove that the centrifugal stress at the root of an untapered blade attached to the drum of an axial…

Q: A Pelton wheel installation uses a water jet of 75 mm diameter to drive a wheel with the bucket on a…

Q: Problem Solving: Input your final answer on the space provide. Water flows through the piping…

Q: 8.6 A single sided centrifugal compressor is to deliver 14 kg of air per second when operating at a…

Q: Water is flowing horizontally in a pipe that has a diameter of 25cm. The water is flowing at 8 m/s.…

Q: In Fig. there are 125 ft of 2-in pipe, 75 ft of 6-inpipe, and 150 ft of 3-in pipe, all cast iron.…

Q: You are asked to calculate a rotadynamic pump with a total manometric head of 11 mss and demand flow…

A: Given Data⇒ Total manometric head(h)=11 m Flow is Q=19LitsSInce 1Lits=1000m3shenceQ=0.019m3s The…

Q: It is proposed to build a three- stage centrifugal pump to deliver 4000 kg/min of water at a speed…

A: Given Data The Number of stages is : n=3 Monochromatic head is : Hm=70 m Mass flow rate of pump is…

Q: estimate the force [N] on the flange bolts at section 1. (NOTE: pwater=998 kg/m?)

Q: A centrifugal pump rotates at 1500 revolutions per minute to transport water with a bulk velocity of…

A: Given: N = 1500 rpm V1 = 1 m/s h = 25 m hl = 5 m D1 = 120 mm b1 = 60 mm Vane outlet angle, ϕ = 60…

Q: A hydroelectric plant is supplied with water by a 10 km duct leading from a dam to the turbines. The…

A: Given dataDiameter of duct = 2 mLength of duct = 10 km = 10000 mThe duct inlet is 10 m below the…

Q: 1. Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The…

Q: A wind turbine has a rotor of 55m in diameter, mounted at a hub-height of 60m. The gearbox ratio is…

Q: A centrifugal pump rotates at 1500 revolutions per minute to transport water with a bulk velocity of…

A: A Centrifugal pump is a machine that can transfer fluid from one location to other with the help of…

Q: A hose of diameter 3 cm is used to drain a very large tank filled with water (=1000 kg/m3). The hose…

A: Bernaullis Principle In a fluid flow, the total energy at a point remains conserved. Pressure energy…

Q: Air enters a duct with constant area at the pressure of 139 kPa, temperature of 293 K, and velocity…

Q: A double-acting cylinder has a plunger of 10 cm in diameter. The diameter ratio between the plunger…

A: Given: The diameter of plunger, D = 10 cm The diameter ratio between plunger and stem, D/d = 5 The…

Q: In a test of the centrifugal pump shown in Fig. , thefollowing data are taken: p1= 100 mmHg (vacuum)…

A: Convert 100 mmHg = 13332 Pa, 500 mmHg = 66661 Pa, 180 gal/min =0.01136 m3/s. Calculate the inlet…

Q: PROBLEM: 1. A boiler feed pump delivers water at 100 °C which it draws from an open hotwell with a…

A: As per rules solved 1 problem only

Q: Q3: Water (p= 990 kg/m³ & μ= 0.0013 Pa.s) is pumping from an atmospheric water tank to wa with…

Q: Assuming the clearance is negligible for a single stage compressor with the following data.…

Q: Pelton wheel has to be designed for Hydroelectric power station by taking the following…

Q: A centrifugal pump is to extract water 40 meters below the pump centerline. Water is delivered to a…

A: Given: The head delivered by the pump, H = 5 meter The head below the pump, h = 40 m The diameter of…

Q: Q1) A 50cm pipe is connected to a 25 cm pipe by a standard reducer fitting. For the same flow rate…

Q: (a) What is the speed of the water as it enters the turbine at Point 3 in the illustration? (b)…

Q: It is proposed to build a three- stage centrifugal pump to deliver 4000 kg/min of water at a speed…

A: The expression for the manometric efficiency is…

Q: 10.The nozzle shown in the figure creates a horizontal jet of alcohol ( s = 0.79) which strikes a…

Q: The manometric head developed by a three-stage centrifugal pump running at 450 rpm is 60 m. The…

A: Answer: The manometric efficiency 71.40 %

Q: Acentrifugal pump has di = 24 cm, d2 = 36 cm, by = 12 cm, bz =7.5 cm, B1 = 22° and B2 = 38° and…

Q: Problem 1 A jet of water discharges into an open tank, and water leaves the tank through an orifice…

Q: A conical tube is fixed vertically with its smaller end upwards and it forms a part of the pipeline.…

A: Given: D1 = 245 mm D2 = 467 mm L = 1.8 m Q˙= 128 litres/s = 0.128 m3/s

Q: A Francis radial-flow hydroturbine has the following dimensions, where location 2 is the inlet and…

A: Write the expression for the angular velocity of the rotor and substitute the known values in the…

Q: [1] The inlet of a centrifugal pump is to be designed for optimum conditions when the flow rate of…

Q: Axial Flow Pumps and Fans 14.13 PQ1 Axial-flow pumps are best suited for what condi- tions of head…

A: Axial flow pumps: are best suited for low Head and high Discharge.

Q: A single stage centrifugal compressor which has an impeller with an overall diameter of 60cm is used…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Consider a cylindrical rotating machine where the rotor rotates at a rate of 900 rev/min. Air enters…

A: Cghhj

Q: In the figure, the pipe entrance is sharp-edged. If the flow rate is 0.004 m/s, what power, in W, is…

Q: A blower supplies standard air to a plenum that feeds twohorizontal square sheet-metal ducts with…

A: Consider all units in British. This question is solved with the help of energy equations. As we…

Q: Each stage of an axial flow compressor is of 0.5 reaction, has the same mean blade speed and the…

A: Given data: At entry to first stage: Stagnation conditions: P01=101.3 kPa, T01=278 kPa, Static…

Concept explainers

Numerical Calculations

In the mid-20th century, the availability and the growth in power of digital computers led to the increase in the mathematical model in the field of engineering and science. The analysis of these detailed models needs to be increased.

Question

100%

Question Number 2

[2] A cheap radial-vaned centrifugal fan is required to provide a supply of pressurised
air to a furnace. The specification requires that the fan produce a total pressure rise
equivalent to 8 cm of water at a volume flow rate of 0.3 m³/s. The fan impeller is
fabricated from 30 thin sheet metal vanes, the ratio of the passage width to
circumferential pitch at impeller exit being specified as 0.5 and the ratio of the radial
velocity to blade tip speed as 0.1. Assuming that the overall isentropic efficiency of the
fan is 0.8 and that the slip can be estimated from Stanitz's expression, eqn. (7.18a),
determine (i) the vane tip speed; (ii) the rotational speed and diameter of the impeller;
(iii) the power required to drive the fan if the mechanical efficiency is 0.94; (iv) the
specific speed.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Trending now

This is a popular solution!

Step by step

Solved in 7 steps

SEE SOLUTION Check out a sample Q&A here

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

The inlet pressure to a piping system is 440 kPa. The inlet pipe diameter is 0.6 m. What is the velocity of the flow of water and discharge at the inlet?
Q.3 A firm produces frozen fruits and vegetables, and a venturimeter is used in this process.In a certain step of the process, the cherries are introduced to the cold air stream at -12oC with a 3 in. pipe connected vertically to the throat of the venturimeter. Venturimeter is connected to a pipe 4 in. in diameter. If the air velocity in the throat is 5 times the terminal velocity of the cherries and the ratio of throat/pipe diameter is 0.6, what should be the flow rate of air? Assume that the density of cherries is 1200 kg/m3 and the average diameters are 12 mm. What should be the lay-out of the pipeline between venturimeter and freeze-dryer to prevent the striking of the cherries to the walls? Is there any settling possibility of the cherries at the exit of the venturimeter?
At atmospheric pressure of 100 kpa exists inside a room. Air is exhausted through a 0.5m diameter pipe into the atmosphere. The capacity of the fan is 2000m³/h, consuming a power of 1100 W at a speed of 1000rpm. There is a 60pa pressure drop in the suction while 0.80 kpa at the discharge side. Calculate the fan capacity if the operating speed is changed to 1200rpm with respective chance in power
A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size. Determine: a) If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo)
A four-stage centrifugal pump has four identical impellers, keyed to the same shaft. The shaft is running at 400 r.p.m. and the total manometric head developed by the multistage pump is 40m. The discharge through the pump is 0.2 m*3/s. The vanes of each impeller are having outlet angle as 45°. If the width and diameter of each impeller at outlet is 5cm and 60 cm respectively, Find the manometric efficiency.
In a liquor-bottling plant erected at a site 1 km above sea level (Patm=0.898 bar and temperature 8.7°C) where a centrifugal pump discharges 20 l/s of water against a head of 28 m while the cavita on parameter of the pump a=0.5. Where should the pump inlet location be in m with respect to the water surface.
Air at atmospheric pressure and at 25°C enters a centrifugal blower when the rotor is spinning at 900 rpm. The inner and outer diameters of the rotor are 50 cm and 60 cm, respectively. Air enters the rotor radially and makes angle of -68° with the wheel tangent at the exit. The flow rate expected is 1.8 m3/s. If the efficiency, based on stagnation enthalpy, is 88.1%, calculate the power input, efficiency based on static enthalpy, and the exit fluid angle. Ans: n= 55.7%; exit fluid angle = 270° Answer provided above please provide full solution
A centrifugal pump operating at 900 rpm and delivering 30 L/s of water has aspecific speed of 760. The pipe near suction flange is 15 cm in diameter and has anabsolute pressure of 0.6 kg/cm2. The pipe near the discharge flange is 12.5 cm indiameter and center of discharge is 0.3m above the suction flange. Calculate theabsolute pressure near the discharge.
In a direct boosted cold water system to tanks the pressure of the water main is 350 kPa vertical height from main two tanks is 65 m and the required residual head at tanks is 3m. Calculate the required head of the boosting equipment in meters of water.
A duct 0.40 m high and 0.80 m wide suspended from the ceiling in a corridor, makes a right angle turn in the horizontal plane. The inner radius is 0.2 m and the outer radius is 1.0 m measured from the same center. The velocity of air in the duct is 10 m/s. Compute the pressure drops in this elbow. Assuming friction factor of 0.3, density of 1.204 kg/m3 and length of 10 m. Group of answer choices 441 Pa 143 Pa 341 Pa 413 Pa please provide complete sollution for analysis and review
A dry gas well equipped 30 MMcfd with 85psig tubing pressure must be compressed to 300 psig for sales by centrifugal compressor design What is the amount of actual power required to perform this job, estimate the minimum number of compression stages required for optimum compression efficiency? Additional data nsty = 0.069 cuft , suction temperature 85 K = 1.2 . theoretical speed N - 12200 rpm average deviation factor -0.85atmospheric pressure (assumed xd)=14.71 psia
A saturated steam at 410K is being transported in a pipeline (brass drawing tubing) at a rate of 1 grams/second. Pipe has inside diameter of 0.025 m . The tube is 100m long. The pressure at the entrance is 80kPa. What is the value of G in kg/s.m2?. What is the value of friction factor? 3 significant figures. What is the % of pressure drop? Calculate the outlet pressure. Will it be under compressible or incompressible criteria.(use Perry's Handbook for the properties and constants) R = 8314J/kgmol.K; MW=18.02g/mol