『The principle of nozzle 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. Critical flow Venturi nozzle positive pressure method
The critical flow Venturi nozzle positive pressure method is a high-precision, highly repeatable, and non frequently calibrated gas flow measurement method widely used in gas flow standard devices and industrial process gas flow measurement. The core of the principle of critical flow Venturi nozzle positive pressure method lies in utilizing the principle of critical flow. When the gas flows in the nozzle to a critical state, its flow rate is only related to the upstream gas stagnation pressure, stagnation temperature, and the geometric size of the nozzle failure, and is not related to the downstream accompanying pressure changes. The positive pressure method is to apply a certain positive pressure upstream to make the gas pass through the nozzle in a specific critical state, so as to accurately calculate the gas flow rate based on these parameters. After understanding its unique working principle, it naturally turns to its core components.
2. The system consists of a complete critical flow Venturi nozzle positive pressure measurement system, which usually includes the following key parts: • Gas source: responsible for providing a stable and sufficient gas supply, ensuring that the gas can smoothly pass through the nozzle at the appropriate pressure and flow rate during the measurement process.
. • Critical flow Venturi nozzle: This is the core measuring element of the entire system, and the machining accuracy of its internal geometry and dimensions directly determines the accuracy of the final measurement results. Pressure and temperature measuring device: used to accurately measure the stagnation pressure and stagnation temperature upstream of
4. Application areas • Gas flow standard device: In the field of metrology, it is often used as a standard flow source to calibrate other types of gas flow meters, such as vortex street flow meters, turbine flow meters, etc.
. Industrial process gas flow measurement: In industrial processes such as chemical, oil and gas, and power, accurate measurement and strict control of process gas flow are required. This method is widely used due to its reliability.2. Types and principles of flow meters
Types and principles of flow meters Flow meters are one of the important instruments in industrial measurement, used to m
Hot Blog
Related AD
