| 摘要 |
PROBLEM TO BE SOLVED: To enable flow rate measurement of a gas-liquid two-phase flow even in a region with a small proportion of gas phase.SOLUTION: A two-phase flow rate measurement apparatus 1 includes: a void ratio measurement unit 5 which measures a void ratio of a gas-liquid two-phase flow LG containing a liquid and a gas; a differential pressure measurement unit 4 which measures differential pressure of the gas-liquid two-phase flow LG; and an arithmetic unit 10 which derives, a flow pattern of the gas-liquid two-phase flow LG from fluctuation of the void ratio measured by the void ratio measurement unit 5 and fluctuation of the differential pressure measured by the differential pressure measurement unit 4, gas phase flow velocity and liquid phase flow velocity from a relationship, defined in accordance with the flow pattern, between a void ratio and liquid phase flow velocity, or flow velocity of liquid, and gas phase velocity, or flow velocity of gas, as well as a relationship, defined in accordance with the flow pattern, between differential pressure and liquid phase velocity and gas phase velocity, and flow rates of the gas phase and the liquid phase of the gas-liquid two-phase flow from the gas phase flow velocity and the liquid phase velocity. |
