| 摘要 |
PROBLEM TO BE SOLVED: To precisely determine an error vector by utilizing the peak value of a cross correlation value of luminance patterns in two images, in a method of measuring a particle image flow velocity.SOLUTION: A particle image flow velocity measuring device supplies tracer particles from a tracer particle supply means to a flow field around an object; gives time difference to the tracer particles; applies laser beams for two times, and images reflection light by an imaging means; and obtains a velocity vector of the flow field, based on the two obtained images of the tracer particles. The two images are divided into a plurality of inspection regions, each being a first peak value fp and a second peak value sp of the cross-correlation value of the luminance patterns of the tracer particles in the respective inspection regions of the two images are compared, and it is determined that the reliability of the velocity vector is high, when a relationship of the first peak value fp/the second peak value sp≥1.2 holds, thus enhancing the measurement accuracy of flow state by determining the error vector, without fail. |
