| 摘要 |
PROBLEM TO BE SOLVED: To enable a gas-liquid two-phase flow parameter to be measured with high precision by using a four-probe sensor even when a bubble size is about the same as the distance between probe sensors.SOLUTION: A first sensor 70 of a four-sensor probe forms a first sensor pair, a second sensor pair, and a third sensor pair with a second sensor, a third sensor, and a fourth sensor, respectively. A measurement device comprises: means for calculating a speed vector of the air bubble boundary surface in a gas-liquid two-phase flow for the first to third sensor pairs on the basis of pulse series outputted by the first to fourth sensors; means for estimating a three-dimensional vector Vof a bubble 90 or both boundary surfaces thereof, assuming that the bubble 90 is spherical or much larger than the size of the four-sensor probe, on the basis of the calculated speed vector; bubble diameter calculation means for calculating a diameter of the bubble 90, assuming that the bubble 90 is spherical, on the basis of the calculated speed vector of the bubble 90; and means for calculating an average boundary area concentration on the basis of the speed vector of the boundary surface of the bubble 90 and the speed vector of the bubble 90. |
