What is the working principle of the gas turbine flowmeter?
The working principle of gas turbine flowmeterThe gas turbine flowmeter is measured using a turbine. It converts the flow velocity to the speed of the turbine, then converts the speed into electrical signals proportional to the flow rate. The flowmeter is used to detect instantaneous flow and total accumulated flow, whose output signal is frequency and easy to digitize. The induction coil and the permanent magnet are fixed together on the housing. When the ferromagnetic turbine blade passes through the magnet, the magnetic resistance of the magnetic circuit changes, thereby generating an induced signal. The signal is amplified and shaped by an amplifier and sent to a counter or frequency meter to indicate the total amount of accumulated flow. At the same time, the pulse frequency is converted through frequency voltage to indicate instantaneous flow. The speed of the impeller is proportional to the flow rate, and the speed of the impeller is proportional to the total flow. The output of the turbine flowmeter is a frequency modulated signal, which not only improves the anti-interference performance of the detection circuit, but also simplifies the flow detection system. Its range ratio of up to 10:1, accuracy is less than 0.2%. The time constant of a turbine flowmeter of small inertia and small dimensions can be up to 0.01 seconds.
A vortex flowmeter is an instrument for measuring fluid flow using a regular vortex peeling phenomenon. Column in the fluid vertically into a nonlinear as a vortex generating body, when the Reynolds number reaches a certain value, will be downstream of this column has two rows of parallel shape, upper and lower alternate vortex, known as the "Kaman vortex".
Gas turbine flowmeter is widely used in petroleum, organic liquid, inorganic liquid, liquefied gas, natural gas and low temperature fluid, etc..