| 摘要 |
A gas flow measuring method, a gas flow measuring program thereof, and a gas flow measuring device. A type of gas type to be measured, a temperature, a pressure, a differential pressure, an inlet diameter of a flow measuring device having a constriction device and a throat diameter of the flow measuring device are input. An input constant according to the gas type, the temperature and the pressure, selected from an input constant database (adiabatic index, viscosity and density) according to the gas type, is input. An expansion coefficient is calculated based on the input adiabatic index, a diameter ratio and a pressure ratio. A runoff coefficient is corrected. The flow rate of the gas is calculated by substituting the calculated expansion coefficient, the corrected runoff coefficient, the differential pressure, the throat diameter, the diameter ratio, and the gas density into a gas flow measurement formula. |
