Abstract
High temperature flow velocity measurement system is presented. This system employs the ultrasonic buffer rod method and pulsed Doppler method. The buffer rod has a cooling jacket to use the high efficiency room temperature transducer. A numerical simulation is applied to design the optimised buffer rod, and its result shows good agreement with an experiment. For considering ultrasonic velocimetry method, the temperature dependency of sound velocity in the molten glass at the temperature of 1000℃ to 1200℃ is obtained and its difference is within plus-minus 5 per-cent in the molten borosilicate glass. Therefore, we can apply ultrasonic technique. Using this technique, the velocity, especially the speed of relative moving wall is obtained.
