Acoustic Temperature Profile Measurement Technique for Large Combustion Chambers

1989 ◽  
Vol 111 (2) ◽  
pp. 461-466 ◽  
Author(s):  
S. P. Venkateshan ◽  
P. Shakkottai ◽  
E. Y. Kwack ◽  
L. H. Back
Keyword(s):  
Process Control ◽  
Temperature Profile ◽  
Measurement Technique ◽  
Profile Measurement ◽  
Sound Waves ◽  
Combustion Chambers ◽  
Control Applications ◽  
Acoustic Waveguide ◽  
Gas Volume ◽  
Large Furnace

Measurement of times of flight of sound waves can be used to determine temperatures in a gas. This paper describes a system, based on this principle, that is capable of giving the temperature profile in a nonisothermal gas volume, for example, prevalent in a large furnace. The apparatus is simple, rugged, accurate, and capable of being automated for process control applications. It is basically an acoustic waveguide where the outside temperature profile is transferred to a chosen gas contained inside the guide.

Development of a Temperature Profile Measurement Technique Based on Molecular Tagging Velocimetry

1999 ◽  
Author(s):  
Scott L. Thomson
Keyword(s):  
Image Analysis ◽  
Laser Beam ◽  
Temperature Measurement ◽  
Temperature Profile ◽  
Measurement Technique ◽  
Temperature Measurements ◽  
Profile Measurement ◽  
Molecular Tagging Velocimetry ◽  
Molecular Tagging ◽  
Temperature Measurement Technique

Abstract The development of a new laser-based temperature measurement technique is explained. The technique is based on molecular tagging velocimetry (MTV), an established, non-intrusive method of obtaining velocity profiles throughout a fluid. MTV works by dissolving a photoluminescent chemical in water and directing an ultraviolet laser beam into the solution. The intensity of the light emitted by the chemical upon excitation by the UV beam is inversely related to the temperature of the fluid. Recent research has been directed towards quantifying this temperature-intensity relationship. The method of obtaining temperature measurements, including equipment setup and image analysis, is explained, and a summary of results is given.

An Acoustic System for Pipeline Profile Measurement

1983 ◽  
Vol 105 (4) ◽  
pp. 475-479
Author(s):  
H. Van Calcar
Keyword(s):  
Measurement Technique ◽  
Measurement System ◽  
Performance Enhancement ◽  
Three Dimensional ◽  
Profile Measurement ◽  
Baseline Measurement ◽  
Acoustic System ◽  
Position Measurement ◽  
Long Baseline ◽  
Hardware Configuration

This paper presents an acoustic position measurement system used for precise three-dimensional flowline profile measurement. The system measures several points along the flowline using the long-baseline measurement technique and augments this measurement with depth telemetry repeaters to maintain elevation accuracy throughout the changing installation geometry. The paper discusses both the measurement system and the performance enhancement features. The paper concludes with a discussion of the hardware configuration and the accuracy that can be expected when the technique is extended into deeper operating areas.

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