Table of Contents
What does high coefficient of discharge mean?
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working …
What does the discharge coefficient tell you?
The discharge coefficient is the ratio of actual discharge to the theoretical discharge for a fluid flow. It is used to estimate the losses for a system and is among the three hydraulic coefficients, along with velocity coefficient and contraction coefficient.
What could be the maximum value of coefficient of discharge for V notch?
Here the theoretical discharge value for V-notch is 0.0068 and for rectangular notch is 0.0145. While the actual discharge value obtained for V-notch is 0.00648 and for rectangular notch is 0.0211.
Can Co efficiency of discharge be greater than unity?
Plug in a coefficient for energy losses through turbulence and you have your formula. But you can see indeed that your coefficient can never be greater than one, because that would mean that you end up with more energy than you started with.
Why coefficient of discharge of Venturi meter is always greater than coefficient of discharge of an orifice?
In Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.In venturi meter losses are low due to steamline shape of the diffuser and the pressure gradient is not abrupt as …
Can actual discharge be greater than theoretical discharge?
The difference between the theoretical discharge and actual discharge is called a positive slip. When the theoretical discharge is more than the actual discharge is known as a positive slip.
Which one is maximum discharge in all notches?
The notch angle for maximum discharge over a triangular notch, is 30°
What is the meaning of coefficient of discharge of notch?
Calibration of V-notch : Coefficient of Discharge: It is defined as ratio of actual discharge to theoretical discharge.
Why is coefficient of discharge for Venturi meter greater than orifice meter?
Can the discharge coefficient be larger than unity?
But you can see indeed that your coefficient can never be greater than one, because that would mean that you end up with more energy than you started with.
What is the coefficient of discharge for a venturi meter?
The effective discharge coefficient for venturi meters ranges from 0.9 to about unity (Streeter, 1951; American Society of Mechanical Engineers, 1983) with turbulent flow, and it varies with diameter ratio of throat to pipe.
Which is greater between theoretical discharge and actual discharge and why?
What is the discharge over a rectangular notch?
The discharge over a rectangular notch is Where H = height of liquid above all still of the notch.
What could be the maximum value of coefficient of discharge for V-notch?
What is coefficient of discharge in venturi meter?
What is the value of coefficient of discharge in Venturimeter normally?
0.95-0.99
Coefficient of Discharge of Venturimeter (Cd) The typical range of the discharge coefficient of a Venturi meter is 0.95-0.99 but this can be increased by proper machining of the convergent section.
How coefficient of discharge is related to Reynolds number?
The discharge coefficient is the actual flow ratio with the theoretical flow and makes allowances for flow contractions and friction effects. The discharge coefficient is a function of the Reynolds number while the Reynolds number is a function of the flow rate calculated using the discharge coefficient value.