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)
Also to know is, can a discharge coefficient 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.
- Insert the diameter of the orifice, d = 50 mm .
- The calculator will now estimate the area of orifice, A .
- Enter the coefficient of discharge, Cd = 0.8 .
- Enter the value of the mean center line, H = 200 mm .
- The acceleration due to gravity, g is filled in as 9.81 m/s2 .
Secondly, what do you mean by coefficient of velocity and coefficient of contraction of an orifice?
Hydraulic Coefficients include Coefficient of contraction, Coefficient of velocity, Coefficient of discharge and Coefficient of resistance. The following are the hydraulic coefficients: 1. Coefficient of contraction (Cc). It is defined as the ratio of area of jet at *vena contracta (ac) to the area of orifice (a).
What is a typical coefficient of discharge?
A discharge coefficient cd = 0.975 can be indicated as standard, but the value varies noticeably at low values of the Reynolds number.
What is coefficient of velocity orifice?
Explanation: Coefficient of velocity: It is defined as the ratio of the actual velocity of the jet at veena contracta V to the theoretical velocity Vth.
What is coefficient of velocity?
Definition of coefficient of velocity
: the ratio of the actual velocity to the theoretical velocity of a fluid jet.
What is nozzle meter?
Nozzle meter is bolted between flanges of pipe carrying the fluid. The pressures on upstream and downstream (P1and P2) are noted by using a differential pressure sensor for the calculation of flow rate. Pressure variation along with the pipeline for flow nozzle.
What is orifice coefficient?
The discharge coefficients are used to measure the flow and pressure loss behaviour of nozzles. Orifices and nozzles can be used to reduce pressure or to measure flow rate.
What is the difference between Orificemeter and Venturi meter?
Venturi meter and orifice meter are used for measuring the volumetric flow rate of the fluid that based on the continuity equation and Bernoulli’s equation. The difference between venturi meter and orifice meter are: … The coefficient of discharge in the venturi meter is 0.98 while in orifice meter it is 0.6.
What is the maximum value of coefficient of discharge?
0.61 to 0.79. 0.72 to 0.89.
What is the purpose of orifice?
An orifice is any opening, mouth, hole or vent, as in a pipe, a plate, or a body. Body orifice, any opening in the body of a human or animal. Orifice plate, a restriction used to measure flow or to control pressure or flow, sometimes given specialised names: Calibrated orifice, used to control pressure or flow.
What is the value of coefficient of velocity?
Coefficient of velocity (Cv):
It is defined as the ratio between the actual velocity of a jet of liquid at vena contracta and the theoretical velocity of jet. It is denoted by Cv. The value of Cv varies from 0.95 to 0.99.
Where is orifice meter used?
Applications of Orifice Meter
It is used to measure the flow rate of fluids in their single state (i.e. gaseous state or liquid state). It can also be used to measure the flow rate of fluids in a mixed state (both gaseous and liquid states) such as, wet steam, or natural gas with water.