Question: What formula is used to calculate the flow rate of compressed air passing through a throttle orifice?
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Question: What formula is used to calculate the flow rate of compressed air passing through a throttle orifice? Should it be calculated using the formula for the outflow of incompressible gases or the formula for the outflow of compressible gases? The inlet pressure at the throttle orifice is 0.3–0.4 MPa, while the outlet pressure is 0.1 MPa. Could someone with expertise please help! ! !
There’s no difference, because when you use software to calculate the size of the orifice plate, you should already know its flow rate
Q = k multiplied by the square root of △p; k is a flow coefficient that depends on factors such as the medium’s temperature, pressure, and pipe diameter. △p is the pressure difference before and after the orifice plate, and this value can be measured. By performing calculations, the flow rate can be determined
Bernoulli's equation. The simplest. But only an approximate flow rate can be obtained. Since the loss of frictional energy cannot be estimated, we have: p1 + 1/2ρv1^2 + ρgh1 = p2 + 1/2ρv2^2 + ρgh2. P1 = 0.3–0.4 MPa, P2 = 0.1 MPa; h1 = h2 = 0, and v1d1^2 = v2d2^2. Here, v1 is the diameter of the inlet pipe, V2 is the diameter of the orifice, and ρ is the density of compressed air. By determining V1 or V2, it is possible to calculate the flow rate: Q = V*d^2/4. This post was last edited by lnhn0203 on 2009-3-2 at 22:37
Measurement of orifice plate flowmeters, along with temperature and pressure compensation adjustments
What formula is used to calculate the flow rate of compressed air passing through a throttle orifice? Each flow orifice plate is accompanied by a calculation sheet for its use, and it is necessary to follow the calculation sheet specific to that orifice plate provided by the manufacturer. Orifice plate parameters that have not been calculated using the required calculation formulas cannot be used to accurately measure flow rate data. When manufacturing orifice plates, parameters such as the orifice diameter, the acute angle of the inner hole diameter, and the thickness of the orifice plate are all related to measurement and calculation. It cannot be solved using common calculation methods. A orifice plate without a calculation sheet is a defective orifice plate that cannot be used. (For reference)