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Ultrasonic thermometry using pulse techniques.Ultrasonic pulse techniques have been developed which, when applied to inert gases, provide temperature measurements up to 8000 K. The response time can be less than 1 msec. This is a significant feature in studying shock-heated or combusting gases. Using a momentary contact coupling technique, temperature has been measured inside steel from 300 to 1500 K. Thin-wire sensors have been used above 2000 K in nuclear and industrial applications where conditions preclude the use of thermocouples, resistance devices, or optical pyrometers. At 2500 K, temperature sensitivity of 0.1% is obtained in Re wire sensors 5 cm long by timing five round trips with an electronic instrument that resolves the time interval between selected echoes to 0.1 microsec. Sensors have been operated at rotational speeds over 2000 rpm and in noisy environments. Temperature profiling of up to ten regions using only a single guided path or beam has also been accomplished.
Document ID
19730057192
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lynnworth, L. C.
Carnevale, E. H.
(Panametrics, Inc. Waltham, Mass., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Symposium on Temperature
Location: Washington, DC
Start Date: June 21, 1971
End Date: June 24, 1971
Accession Number
73A41994
Distribution Limits
Public
Copyright
Other

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