Temperature distribution and wind velocity vector measurement using ultrasonic CT technique

In this report, a measurement method for cross-sectional temperature and wind velocity distribution is considered. A novel method based on ultrasonic CT technique is proposed, and the temperature and the wind velocity distributions are estimated simultaneously by using ultrasonic time of flight data on several propagation paths. The temperature and the wind velocity effects can be clearly separated by considering sum and difference of the time of flight data, and two kinds of projection data; temperature oriented one and wind velocity oriented one are obtained. Filtered back projection method and inverse matrix method are applied to reconstruct the temperature and the wind velocity distributions, respectively. Experimental system is fabricated and simultaneous temperature and wind velocity distribution measurement is performed. As a result, effectiveness of the proposed measurement method is confirmed.