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High Temperature Monitoring the Height of Condensed Water in Steam PipesAn in-service health monitoring system is needed for steam pipes to track through their wall the condensation of water. The system is required to measure the height of the condensed water inside the pipe while operating at temperatures that are as high as 250 deg. C. The system needs to be able to make real time measurements while accounting for the effects of cavitation and wavy water surface. For this purpose, ultrasonic wave in pulse-echo configuration was used and reflected signals were acquired and auto-correlated to remove noise from the data and determine the water height. Transmitting and receiving the waves is done by piezoelectric transducers having Curie temperature that is significantly higher than 250 deg. C. Measurements were made at temperatures as high as 250 deg. C and have shown the feasibility of the test method. This manuscript reports the results of this feasibility study.
Document ID
20120004239
Document Type
Conference Paper
External Source(s)
Authors
Bar-Cohen, Yoseph (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lih, Shyh-Shiuh (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Badescu, Mircea (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bao, Xiaoqi (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sherrit, Stewart (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Widholm, Scott (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ostlund, Patrick (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Blosiu, Julian (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
March 7, 2011
Subject Category
Fluid Mechanics and Thermodynamics
Meeting Information
SPIE Smart Structures and Materials/NDE Symposium(San Diego, CA)
Distribution Limits
Public
Copyright
Other
Keywords
fluid height monitoring
piezoelectric transducers,
high temperatures
sensors
health monitoring