TECHNICAL PAPERS: Bubbles, Particles, and Droplets

Temperature and Volumetric Fraction Measurements in a Hot Gas Laden With Water Droplets

[+] Author and Article Information
Paolo Ruffino, Marino di Marzo

Department of Mechanical Engineering, University of Maryland, College Park, 20742

J. Heat Transfer 125(2), 356-364 (Mar 21, 2003) (9 pages) doi:10.1115/1.1561453 History: Received March 28, 2001; Revised November 06, 2002; Online March 21, 2003
Copyright © 2003 by ASME
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Sketch of the test section in the ECSAT facility (dimensions in meters)
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Evaluation of the constant C experimentally using Eq. (15) (Data Regression) and analytically using Eq. (14) (Theory). The dashed lines bound the ±10 percent region about the data regression.
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Difference between the gas temperature and the temperature read by a sensor in a hot gas laden with water droplets as a function of its diameter
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Collection efficiency as a function of the sensor diameter
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Controlling circuit for the ALTEC sensor
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Function g(w) versus w from Eqs. (22) and (23)
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Sketch of the ALTEC sensor
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Calibration curve to determine the slope Q in Eq. (24) (⋄ dry conditions, ♦ wet conditions)
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Comparison between the temperature measured by the ALTEC sensor and the values read by a thermocouple in dry conditions
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Velocity-temperature correlations for a natural convection plume versus the ECSAT facility operating conditions. The error bar abound each experimental point represents one standard deviations about the mean value. The solid lines represent the correlation by Alpert 21.
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Comparison between the temperature measured by the ALTEC sensor and the values obtained from the ECSAT facility in wet conditions (the methodology to obtain the ECSAT data is described in the paper)
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Water volumetric fraction: values obtained with the ALTEC sensor versus optical measurements. The error bars about each point represent one standard deviation about the mean value.
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Residual droplet volume versus the fraction of residual liquid for the PJ8 and PJ10 nozzles
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Temperature distribution downstream the orifice in the ECSAT facility (⋄ dry conditions, ♦ wet conditions). The thin line is given by Eq. (6) and the thick line is given by Eq. (5).
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Droplet Size Distribution for the PJ8 and PJ10 nozzle.




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