One of the critical requirements for ensuring the safety of a steam pipe is to monitor the condensed water level under operation. For this objective, the authors initially developed methods and obtained preliminary test results based on the use of ultrasonic pulse-echo transducers and enhanced signal-processing tool; however, the methodology needed further development in order to obtain measurements in turbulent dynamic flow conditions. To improve the reliability of measurements taken in turbulent flow conditions, an experimental system was developed using multiple transducers driven by a multiplexer, and a data acquisition module capable of operating in any flow conditions. The system consists of a simulation testbed, which allows testing the performance over a range of flow rates and water levels and to observe flow conditions and patterns, as well as measure actual water level, flow velocities, wave conditions, etc. In this paper, we present the development details that include description of the testbed for simulating the flow of condensed water, the multiple transducers arrangement, the signal processing method, and the test results of both steady state and turbulent flow.
Shyh-Shiuh Lih, Hyeong Jae Lee, Yoseph Bar-Cohen, Mircea Badescu, William Cervantes, and Alan Simonini, "Development and testing of a multi-transducer system for measuring height of condensed water in steam pipes with steady-state and turbulent flow conditions," Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101700Z (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 28, 2017; Published: 5 April 2017); https://doi.org/10.1117/12.2260097.
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