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Discharge coefficient - Wikipedia
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 ideal 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 … See more
Due to complex behavior of fluids around some of the structures such as orifices, gates, and weirs etc., some assumptions are made for the theoretical analysis of the stage-discharge … See more
• Mass Flow Choking, Nancy Hall, 6 April 2018 See more
Wikipedia text under CC-BY-SA license Periodically AFT Arrow users pose the question of what CdA value to use for modeling choked flow through an orifice. This paper reviews the subject to provide guidance in this area.
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Orifice, Nozzle, and Venturi Flow Meters: Principles, Calculations …
See more on engineeringtoolbox.comAssuming a horizontal flow (neglecting the minor elevation difference between the measuring points) the Bernoulli Equationcan be modified to: The equation can be adapted to vertical flow by adding elevation heights: p1 + 1/2 ρ v12 + γ h1 = p2 + 1/2 ρ v22+ γ h2 (1b) where γ = specific weight of fluid (kg/m3, slugs/ft3) h = eleva…The discharge coefficient equation is valid for: 0.316 ≤ d/D ≤ 0.775, 1.5x10 5 ≤ ReD ≤ 2x10 6 , 6.5 cm ≤ D ≤ 50 cm, d ≥ 5 cm, and k/D ≤ 3.8x10 -4 generally.
Flow Through Orifices. - Civil Engineering Portal
Flow through a submerged orifice may be computed by applying Bernoulli’s equation to points 1 and 2 in figure below. Values of C for submerged orifices do not differ greatly from those for nonsubmerged orifices.
Coefficient of Discharge Calculator
The coefficient of discharge calculator will help you determine the ratio between the theoretical and actual discharge or flow rate values for a fluid flow.
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How do I determine the flow rate of compressed air through a pipe ...
If flow isn't choked, you can use mdot = CdA sqrt(2 rho dp), where CdA is not actually a Cd coefficient times some area but actually a combination of loss coefficients (frictional, bends, …
Flow Through an Orifice ( English Units ) - AFT
Flow Through an Orifice (Metric Units) This example demonstrates a sample calculation to determine the maximum flow through a system where sonic choking occurs, as well as the sonic pressure and area, and it explores the effect of …
Coefficient Of Discharge Calculator & Formula Online Calculator …
Oct 3, 2024 · Calculation Formula. The formula to calculate the Coefficient of Discharge (C d) is: \[ C_d = \frac{Q_a}{Q_t} \] Where: \( Q_a \) is the actual flow rate (in m³/s). \( Q_t \) is the …
Modeling Choked Flow Through an Orifice - AFT
Jun 23, 2010 · To answer the question at the beginning of this paper, ‘what CdA value to use for modeling choked flow through an orifice’, that depends on the goal. If the goal is to insure a …
On the Flow of a Compressible Fluid through Orifices
When a fluid is discharged through a convergent nozzle, con- ditions across the exit section are generally assumed, with little error, to be sensibly uniform. The exit velocity may therefore be …
Discharge Coefficient - Piping Designer
Different flow devices have different discharge coefficient values, and they can vary depending on the operating conditions. By incorporating the discharge coefficient into flow calculations, more …
Orifice CdA and Sonic Choking ( English Units ) - AFT
This example demonstrates a sample calculation to determine the maximum flow through a system where sonic choking occurs, as well as the sonic pressure and area, and it explores …
The following equations utilized by Generant’s Flow Calculator are mathematically equivalent to the formulas and methods described in BS. EN ISO 4126-1. Notes: Constants within equations …
Is This Valve Choked? - AFT
The product of coefficient of discharge and effective flow area under choked conditions, AFT Arrow can directly calculate the CdA for some cases, such as at the discharge from a pipe. For …
Discharge Coefficient Loss Model - AFT
When solving the system, AFT xStream creates a subsonic CdA for the orifice using the Cd specified for the subsonic loss model, and the specified orifice area. xStream then solves the …
Discharge Coefficient - Valvias
The discharge coefficient is a characteristic non-dimensional factor of the valve, which is used to calculate the flow rate (Q) when the valve discharges the fluid from a tank or reservoir (Δh) to …
Orifice equation | Engineering | Fandom
The orifice equation describes the rate of flow of liquid through an orifice. The equation can be represented as: = where Q = flow (cubic metres per second) = coefficient of discharge A = …
Flow Through an Orifice ( Metric Units ) - AFT
Flow Through an Orifice (English Units) This example demonstrates a sample calculation to determine the maximum flow through a system where sonic choking occurs, as well as the …
Online Flow Equations: Flow rate calculation - Valvias
K = Kv, when K is referenced in [m³/h] [bar] units. Flow equations to calculate Flow rate.
Construction of a traffic flow prediction model based on neural ...
Mar 21, 2025 · Experiments are conducted on four traffic flow and two traffic speed datasets, showing that compared to traditional time series models, the proposed model’s prediction …
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