Mechanical Engineering - Hydraulic Machines - Discussion

49. 

A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit discharge of wheel is

[A]. 0.25 m3/s
[B]. 0.5 m3/s
[C]. 1.5 m3/s
[D]. 2.5 m3/s

Answer: Option A

Explanation:

No answer description available for this question.

Saurabh said: (Oct 22, 2013)  
Unit discharge(Q') = Q/H^2.
So Q'= 2500/(100^2).

Therefore,
Q' = 0.25(B).

Viettan K said: (Oct 14, 2014)  
Please explain more detail what unit discharge is?

Ram Kumar said: (Nov 12, 2014)  
In some other case answer as 1.75, Its a right or wrong?

Saurabh Yadav said: (Jan 23, 2015)  
Unit discharge = Q/(H)^(1/2).

Q = 2500 Lit. = 2.5 m^3.

Unit discharge = 2.5/(100)^(1/2) = 0.25.

Madhu said: (Jul 23, 2017)  
Thank you @Saurabh Yadav.

Pratik said: (Sep 15, 2019)  
@Ram Kumar

1.75 was unit power, unit speed is 20 rpm, unit discharge is 0.25.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.