What does coefficient of discharge of a notch indicate? Calibration of V-notch :
Coefficient of Discharge: It is defined as ratio of actual discharge to theoretical discharge .
What does coefficient of discharge indicate?
What does high coefficient of discharge mean?
Is the coefficient of discharge a constant for all notches?
What is the value of coefficient of discharge of rectangular notch?
It was discovered experimentally that shape and water height over the notch has effect on coefficient of discharge and volume discharged. The coefficient of discharge obtained is: 0.469 for v- notch and 0.3252 for rectangular notch.
Why is the coefficient of discharge less than 1?
The reason why Cd values are always less than 1 is because the actual discharge will always be less than the theoretical discharge idealized by Toricelli . This is so due to the effect of surface tension and friction from the external fluid.
Can the coefficient of discharge be greater than 1?
In practice, the discharge coefficient cannot be greater than one . This is a fact. The error may be in compensating the values of the variables in the equation. Verifies units, values, and homogeneity of area values.
What is coefficient of discharge for a flow measuring device?
The discharge coefficient can be thought of as a correction factor for “real” flow meter devices . It is typically determined experimentally for different flow meters. Correlation equations can be used to calculate the real “corrected” flow rate through a given meter. Figure 1.
What affects coefficient of discharge?
In a single phase flow, the discharge coefficient depends mainly on the Reynolds number and the beta factor . Dependence on Reynolds numbers is very weak (except low Reynolds numbers), so the performance of differential flow meters is rather insensitive to liquid viscosity.
What is the range of coefficient of discharge?
The orifice discharge coefficients are in the range of 0.6-0.9 and are affected by the fluid viscosity and the size of the vena contracta in the orifice.
What is the objective of the experiment calibration of V notch ‘?
Objective: To determinate the co-efficient of discharge of a V-Notch .
What is the purpose of rectangular notch?
The rectangular weir (notch) is a common device used to regulate and measure discharge in irrigation projects . The current research was based mainly on laboratory experiments studying the hydraulic characteristics of rectangular notches.
What does the coefficient of discharge represent in measuring the actual discharge of the orifice meter?
Coefficient of discharge (C d ): It is the ratio of actual discharge to theoretical discharge . As in a pipe, frictional losses are presents therefore Q actual will always be less than Q theoretical . Its value is always less than 1.
Can coefficient 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 is coefficient of discharge for Venturi meter greater than orifice meter?
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 ...
Why does discharge coefficient increase with Reynolds number?
How does the discharge coefficient vary with the flow rate?
Which notch is preferred for high discharge?
What is the purpose of V-notch and rectangular weir?
To conserve delivery head and reduce head loss , the rectangular and wide V-notch weirs rated by Kindsvater methods should be selected. These weirs provide the capability to use shorter heights from the approach channel invert to the crest.
What do you mean by calibration of a notch?
What is a notch explain?
noun. an angular or V-shaped cut, indentation, or slit in an object, surface, or edge . a cut or nick made in a stick or other object for record, as in keeping a tally. New England and Upstate New York. a deep, narrow opening or pass between mountains; gap; defile.
What are the applications of notches?
What are the coefficient of velocity coefficient of contraction and coefficient of discharge for an orifice?
Empirical evidence has indicated that the coefficient of discharge for orifice plates to be between 0.6 and 0.85 . What is the coefficient of the discharge of an Oriface meter? Cc is the coefficient of contraction. Cc is given by the ratio of area of jet at vena contracta and the area of orifice.
How do you calculate the coefficient of discharge for V notch?
- AIM : To determine the coefficient of discharge of v – notch.
- APPARATUS : V-Notch equipment, Bucket, Inclined manometer, stop-watch.
- PROCEDURE :
- GRAPHS : Q = C D 8/15 tanΘ/2 √2g H 5 / 2 Q = K H 5 / 3 ; K = C D 8/15 tanΘ/2 √2g.
- RESULT : The value of discharge coefficient of v-notch obtained from,
- OBSERVATION TABLE :
What are the factors on which coefficient of discharge depends for a V notch?
it directly depends on rate of flow of velocity ... Explanation: Coefficient of discharge is stated as the ratio between the actual flow discharge and theoretical flow discharge. ... It has no dimensions and depends directly on the rate of flow and velocity of working fluid.
How do you find the coefficient of discharge?
What is the unit for coefficient of discharge?
| Symbol Name fps units | A Flow area ft 2 | BHP Energy requirement hp | C d Discharge coefficient (square edged hole=0.8, ragged hole=0.72, ductile failure=1.0) decimal | c e Erosion constant ft/s |
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