Question: The S-shaped head-versus-flow curve in Fig. P11.82 occurs in some axial-flow pumps. Explain how a fairly flat system-loss curve might cause instabilities in the operation

The S-shaped head-versus-flow curve in Fig. P11.82 occurs in some axial-flow pumps. Explain how a fairly flat system-loss curve might cause instabilities in the operation of the pump. How might we avoid instability?

System curve

Step by Step Solution

★★★★★

3.39 Rating (158 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The stability of pump operation is nicely covered in the review article by Greitzer Ref 41 of Chap 1... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

E-ME-FM (1386).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

A small pump takes in water at 20C, 100 kPa and pumps it to 2.5 MPa at a flow rate of 100 kg/min. Find the required pump power input.

A small pump takes in water at 70 F, 14.7 lbf/in.2 and pumps it to 250 lbf/in 2 at a flow rate of 200lbm/min Find the required pump power input. Assume reversible pump and incompressible flow

The jet pump in Fig P3.36 injects water at U1 = 40 m/s through a 3-in pipe and entrains a secondary flow of water U2 = 3 m/s in the annular region around the small pipe. The two flows become fully...

Argon gas enters a constant cross-sectional area duct at Ma1 = 0.2, P1 = 320 kPa, and T1 = 400 K at a rate of 1.2 kg/s. Disregarding frictional losses, determine the highest rate of heat transfer to...

San Antonio Company produces accounting software. Its unit cost structure, based on an anticipated production volume of 150,000 units, is:sale price is 160, variable costs is 60 and fixed costs is...

What are the disadvantages of a partnership over a limited liability company form of organization for a profit-making business?

49. A and B play a series of games with A winning each game with probability p. The overall winner is the first player to have won two more games than the other. (a) Find the probability that A is...

In August 2011, the PCAOB barred two former Ernst & Young LLP (E&Y) employees from auditing public companies, alleging they provided misleading documents to PCAOB inspectors who were evaluating the...

Beginning January 1, 2019, the federal tax laws changed. The changes made were primarily to corporate tax laws but also effected specific areas of taxation for individuals. In your own words, briefly...

For the 2 Ã 3 - 10 centrifugal pump performance curve shown in Fig. 13.28, describe the performance that can be expected from a pump with an 8-in impeller operating against a system head of...

Discuss how changing geologic conditions affected the evolution of invertebrate life during the Paleozoic Era.

Venus Office Supplies began operations October 1, 2016. The firm sells its merchandise for cash and on open account. Sales are subject to a 5 percent sales tax. During October, Venus Office Supplies...

Required Return If the risk - free rate is 1 1 . 2 percent and the market risk premium is 6 . 4 percent, what is the required return for the market? Multiple Choice 1 7 . 6 % 6 . 4 % 1 1 . 2 % 4 . 8 %

On March 1, 2019, PT Maju purchased a cash supply of 500 boxes of fresh detergent soap merchandise @ 24 packs with a total purchase value of IDR 108,000,000. On April 1, 2019, all of the Fresh...

Tom and Nancy want to buy a house in a particular neighborhood. they have two children ages 1 and 4. The average price home in this neighborhood runs about $350,000. Together their family income is...

Choose one (1) and only one of the following four 2 assignment options. Provide your response back in this document, and SUBMIT it back using Google Classroom once completed. Instructions: 1:...

At 6,650 ft TVD a permeable gas reservoir is drilled that could have a pore pressure gradient as high as 12.0 ppg. a) What mud pressure (in psi) and mud weight (in ppg) should be used if ChevBob...

Sandra stopped working, and stopped contributing to the Canada Pension Plan, on her 65th birthday. At age 65, she applied for and began to receive her CPP retirement income. Her birthday falls on...

Give your own views on the changing nature of the work organisation. Give examples from your own organisation.

Show that the risk-neutral probability of a call finishing in the money is phi (d_2, (T, S_0, K, sigma, r)). Show that the risk-neutral probability of a call finishing in the money is phi (d_2, (T,...

find the mean, median and mode for one of the variables.Which of these measures of central tendency do you think is the best choice for "average" and why?Find the range and standard deviation...

how to solve the logistic model using R programming what are the code to use to produce the 1 st and 2 nd using R programming please provide the code. data is following: