discharge coefficient

discharge coefficient

[′dis‚chärj ‚kō·i′fish·ənt]
(fluid mechanics)
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 identical working fluid from the same initial conditions to the same exit pressure. Also known as coefficient of discharge.

coefficient of discharge

1.The ratio of the actual discharge of water through an opening to its corresponding theoretical value.
2. The ratio of effective area to the free area of an air diffuser.
References in periodicals archive ?
Otherwise, the combined weir-gate could increase effectively discharge coefficient because of dividing the vortexes zone of downstream the structure into two sections that results in passing easily flow through the combined weir-gate.
It is important to point out that, based on the information found in Miller (1996) and the variation in results presented in Figure 4, and without nipple orifice data, nipple orifice system designers have been faced with the difficulty of selecting an appropriate discharge coefficient.
For a given cone meter geometry this equation uses the discharge coefficient to link known fluid properties and the read DP to the flow rate.
d] is the nozzle discharge coefficient, assumed equal to 0.
The comparisons were done with the same pressure and temperature sensors associated with the venturi during the testing on both flow standards in order to reduce some possible sources of discharge coefficient differences.
The flow intensity coefficient variation in different modes than the Froude number and the percentage of intake network opening will reduce the flow discharge coefficient.
The flow resistance parameter is a discharge coefficient in the orifice flow equation that models the supply air flow.
In reality, the discharge coefficient is a function of valve opening ratio [alpha].
Another issue involves the effect of precipitates and other sources of deposition on the discharge coefficient of differential meters such as Venturi and Cone-type meters.
d] is the discharge coefficient of the morning glory spillway, L is the length of the spillway crest, and H is the height of water over the spillway [8].
2004) found that the discharge coefficient is a function of wind direction and pressure differences across the opening.
The results in this study are presented as the equivalent leakage area, which is defined at a differential pressure of 10 Pa and a discharge coefficient of 0.