What is the discharge coefficient of an orifice?
The coefficient of discharge for orifices in pipes varies from 0.60 to 0.80 and varies with the diameter ratio. For flow nozzles in pipelines, the coefficient varies from 0.96 to 1.2 for turbulent flow and varies with the diameter ratio.
How is orifice flow coefficient calculated?
To calculate the flow rate of fluid passing through an orifice:
- Multiply the gravitational constant g with the mean centerline H .
- Multiply the produce with 2 .
- Find the square root of the product.
- Multiply the resultant with the area of orifice A and coefficient of discharge Cd .
What is coefficient of velocity orifice?
The coefficient of velocity, cv for an orifice is 0.98.
How do you calculate discharge?
Discharge = V x D x W If length is measured in feet and time in seconds, Discharge has units of feet3/sec or cubic feet per second (cfs). Depth times Width gives the cross-sectional area.
What is the coefficient of orifice meter?
Orifice coefficient, generally, is 0.61 in case of flange taps and vena-contracta taps for NRe< 30,000. In the process of calculating fluid velocity with a orifice meter, the velocity of approach is not included.
What is coefficient of velocity for orifice?
The common wisdom of the textbooks has it that the coefficient of velocity for a free jet leaving sharp-edged orifice is about 0.98 and that it is weakly dependent on viscosity. Nothing is normally said about the influence of surface tension.
What is meant by coefficient of discharge CD?
Definition of coefficient of discharge : the ratio of the actual discharge to the ideal discharge, assuming unit coefficients of contraction and velocity, equal to the product of these coefficients.
What is CD and Cv in statistics?
Useful and meaningful only for variables that take on positive values, the coefficient of variation is defined as the ratio of the standard deviation to the absolute value of the mean.
What is Cv in orifice meter?
Cc = Area of vena contracta/ area of orifice. Cv = actual velocity at vena contracta/theoretical velocity.
What is the difference between coefficient of discharge and coefficient of velocity?
Coefficient of velocity :- It is defined as the ratio of the actual velocity of the jet at vena-contracta to the theoretical velocity . Coefficient of discharge :- It is defined as the ratio of actual discharge through the orifice to the thoretical discharge .
How do you calculate discharge and flow rate?
The amount of fluid passing a section of a stream in unit time is called the discharge. If v is the mean velocity and A is the cross sectional area, the discharge Q is defined by Q = Av which is known as volume flow rate. Discharge is also expressed as mass flow rate and weight flow rate.
What is coefficient of discharge of Venturimeter?
The discharge coefficient of a Venturi meter is typically 0.985, but may be even higher if the convergent section is machined. Discharge coefficients for uncalibrated Venturi meters, together with corresponding uncertainties, are given in ISO 5167-1: 1991.
What are the coefficient of velocity coefficient of contraction and coefficient of discharge for an orifice on what factors do these coefficients depend?
Coefficient of discharge is equal to the product of the and . Coefficient of contraction :- It is defined as the ratio of area of jet at vena-contracta to the area of orifice . Coefficient of velocity :- It is defined as the ratio of the actual velocity of the jet at vena-contracta to the theoretical velocity .
How is discharge coefficient 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.
What is coefficient of discharge for Venturimeter?
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.
How do you calculate CV in statistics?
The formula for the coefficient of variation is: Coefficient of Variation = (Standard Deviation / Mean) * 100. In symbols: CV = (SD/x̄) * 100. Multiplying the coefficient by 100 is an optional step to get a percentage, as opposed to a decimal.
How to measure discharge using an orifice?
typical methods of measuring the discharge of an essentially incompressible fluid, whilst at the same time giving applications of the Steady-Flow Energy Equation (Bernoulli’s Equation). The discharge is determined using a Venturi Meter, an Orifice Plate Meter and a Rotameter.
How to calculate discharge coefficient?
Definitions
How do you calculate the discharge coefficient?
– H = Head of water on the upstream side of the weir – h = Head of water on the downstream side of the weir – v = Velocity of the water on the downstream side of the weir (i.e., at B) – Cd= Coefficient of discharge and – L = Length of the weir
What are the units of coefficient of discharge?
Problem. What is the “discharge coefficient” used in various places such as with the “Discharge Coefficient” and “Valve Characteristics Curve” Valve Type with a TCV node,or when using the