Multi throat flowmeter | Venturi flowmeter actual flow calculation formula

『Multi throat flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Wind volume testing method?

For air volume measurement, handheld anemometers (pitot tubes, impellers, thermal probes, it is recommended to use pitot tubes connected to differential pressure transmitters for measurement) can be used occasionally for simple measurement. For long-term measurement of pipeline air volume, such as those used in power plants, plug-in flow meters such as plug-in flow meters, plug-in bar flow meters, power bar flow meters, delta bar flow meters, plug-in multi throat diameter flow meters, cross-sectional flow meters, and other differential pressure throttling devices are widely used by users due to their high stability, simplicity, good linear repeatability, and low pressure loss.

2. What is the influence of the diameter of the Venturi tube throat on the measurement accuracy and measurement range of the Venturi flowmeter (specifically...

According to the Venturi tube mass flow formula: M=[C/(1- β ^ 4) ^ (1/2)] ·ε · (π/4) · d ^ 2 · (2 ·Δ P ·ρ) ^ (1/2), where M - mass flow rate C - outflow coefficient C=[M (1- β ^ 4) ^ (1/2)]/[(π/4) · d ^ 2 · (2 ·Δ P ·ρ) ^ (1/2)] C depends on the Reynolds number, which depends on the mass flow rate M and must be iteratively used Obtained by law. β - throat diameter d/pipe diameter D ε - pipeline expansion coefficient ε=[M (1- β ^ 4) ^ (1/2)]/[(π/4) · d ^ 2 · C · (2 ·Δ P ·ρ) ^ (1/2)] d - throat diameter Δ P - differential pressure ρ - medium density under working conditions. It can be seen that changing the throat diameter can change the differential pressure range, and your problem can actually be attributed to the influence of differential pressure range on measurement; The design of throttling components must ensure that the outflow c

oefficient C is constant, that is, the Reynolds number remains unchanged within the required accuracy range (throttling flow meters can only ensure the accuracy of a commonly used section within the measurement range). And the Reynolds number is also related to the throat diameter (which affects the flow velocity and the flow velocity at maximum and minimum flow rates). Due to the iterative method required to obtain the outflow coefficient C, it is necessary to first give a differential pressure, calculate the throat diameter, and then verify whether it meets the requirements. If it does not meet the requirements, the throat diameter should be recalculated. If it still does not meet the requirements after multiple repetitions, the calculation should be repeated starting from changing the differential pressure. (Actually, experienced designers can complete it all at once). So the impact of changing the throat diameter on accuracy and range is uncertain. The accuracy and range actually depend mainly on the calculation and manufacturing width of the wax, and have little to do with the differential pressure (throat diameter); Bonus points!

3. New breakthrough in flow measurement: detailed design of embedded low-temperature Venturi flowmeter - mastering core technology and precision The embedded low-temperature Venturi flowmeter integrates pressure/temperature sensors and digital signal processing technology to achieve high-precision real-time measurement of fluid flow in low-temperature environments, solving the problems of large errors and slow response of conventional equipment in low-temperature conditions. It is suitable for low-temperature media such as liquid nitrogen and liquid oxygen, and has significant appl

Multi throat flowmeter | Venturi flowmeter actual flow calculation formula

1. Wind volume testing method?

2. What is the influence of the diameter of the Venturi tube throat on the measurement accuracy and measurement range of the Venturi flowmeter (specifically...

『SILVER Official Website SERVICE』