Two temperatures can be detected in a hot gas laden with water droplets. The lower one is the temperature read by a sensor immersed in the flow. This measurement is affected by significant evaporative cooling resulting in readings much below the real gas temperature. The higher one is the temperature of the gas. The difference between these two temperatures is proportional to the water volumetric fraction in the flow. On this basis, a new technique for the measurement of the water volumetric fraction is proposed. The results are compared with a conventional measurement technique based on optical methods. A novel approach to the gas temperature measurement is also introduced. The sensing device is kept at temperatures exceeding the Leidenfrost transition and therefore it is insensitive to the presence of the water droplets. Independent measurement techniques developed at the Evaporative Cooling Sensor Accuracy Test (ECSAT) facility provide the data to validate the measurements obtained with the Above Leidenfrost Temperature and Evaporative Cooling (ALTEC) sensor.
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Technical Papers
Temperature and Volumetric Fraction Measurements in a Hot Gas Laden With Water Droplets
Paolo Ruffino,
Paolo Ruffino
Department of Mechanical Engineering, University of Maryland, College Park, 20742
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Marino di Marzo
e-mail: marino@eng.umd.edu
Marino di Marzo
Department of Mechanical Engineering, University of Maryland, College Park, 20742
Search for other works by this author on:
Paolo Ruffino
Department of Mechanical Engineering, University of Maryland, College Park, 20742
Marino di Marzo
Department of Mechanical Engineering, University of Maryland, College Park, 20742
e-mail: marino@eng.umd.edu
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division March 28, 2001; revision received November 6, 2002. Associate Editor: S. S. Sadhal.
J. Heat Transfer. Apr 2003, 125(2): 356-364 (9 pages)
Published Online: March 21, 2003
Article history
Received:
March 28, 2001
Revised:
November 6, 2002
Online:
March 21, 2003
Citation
Ruffino , P., and di Marzo, M. (March 21, 2003). "Temperature and Volumetric Fraction Measurements in a Hot Gas Laden With Water Droplets ." ASME. J. Heat Transfer. April 2003; 125(2): 356–364. https://doi.org/10.1115/1.1561453
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