抄録
For energy efficient operation of steam facilities, it is often required to measure a wide range of vapor flow rate. Clamp-on flowmeters are advantageous when it is necessary to measure vapor flow rates in various locations within one facility. On the other hand, ultrasonic flowmeters are well-known for their wide range of measurable gas flow rate. In the past, a clamp-on ultrasonic gas flow meter was developed, however there was a need for a damping material able to propagate ultrasonic wave through high temperature vapor pipe. The development of a clamp-on ultrasonic steam flowmeter with a high temperature endurance silicone rubber damping material is presented here. Silicone with high loss modulus has demonstrated good damping characteristic of ultrasonic wave. Using loss modulus conversed at 1MHz with W.L.F equation, we indicate the characteristic of this silicone rubber damping material.
