What is orifice discharge coefficient?
The discharge coefficient is a dimensionless number used to characterise the flow and pressure loss behaviour of nozzles and orifices in fluid systems. Orifices and nozzles are typically used to deliberately reduce pressure, restrict flow or to measure flow rate.
What does discharge coefficient represent?
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 theoretical 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 …
How do you find the orifice coefficient of discharge?
The discharge coefficient of an orifice or nozzle is defined as the ratio of the actual to theoretical flow rate:
- Cd=Measured Flow RateTheoretical Flow Rate (1)
- η=σΔp12ρ¯V2 (6)
- ξ=σΔp¯Δp (7)
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 the importance of coefficient of discharge?
An important element in this process is the discharge coefficient, which is defined as: “In a nozzle or other constriction, the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an iden- tical working fluid from the same initial conditions to the same exit pressure” …
What does high discharge coefficient mean?
Coefficient of discharge is stated as the ratio between the actual flow discharge and theoretical flow discharge. In nozzle flow measurement, the efficiency of Cd is higher when compared to the flow measurement at the orifice. …
What is the principle of orifice meter?
Basic Working Principle of an Orifice Meter The liquid or gas whose flow rate is to be determined is passed through the orifice plate. This creates a pressure drop across the orifice plate which varies with the flow rate, resulting in a differential pressure between the outlet and inlet segments.
What is the difference between orifice and mouthpiece?
Actually both orifice and mouthpiece are openings of different types but both are used to measure the discharge of water or liquid. But the basic difference is that: The openings are made such that the discharge of the fluid can be take place.
How do you calculate the discharge coefficient?
The following equation can be used to find the discharge coefficient: Cv = ((39.693 * d^4) / ( H / (V^2 / 2g)))^0.5. You can plug in the pressure head along with the same flow and corresponding velocity (using Q=VA) to derive the discharge coefficient:
How do you calculate orifice?
Divide the flow of the liquid by the velocity of the liquid to determine the area of the orifice in square feet. In the above example, you would divide 8 by 2. The total area of the orifice would be 4 square feet.
What is the coefficient of discharge?
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge) is the ratio of the actual discharge to the theoretical 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 fluid from the same initial conditions to the
What is the flow rate through an orifice?
The orifice equation describes the rate of flow of liquid through an orifice. The equation can be represented as: $ Q = C_{d}A\\sqrt{2gh} $. where Q = flow (cubic metres per second)
