On the efforts to provide a reliable source of experimental information on turbulent
subcooled boiling ow, time resolved Particle Tracking Velocimetry (PTV) experiments
were carried out using HFE-301 refrigerant ow through a vertical rectangular
channel with one heated wall. Measurements were performed at liquid Reynolds numbers
of 3309, 9929 and 16549 over a wall heat flux range of 0.0 to 64.0 kW=m2. From
the PTV measurements, liquid two dimensional turbulence statistics are available,
such as: instantaneous 2-D velocity fields, time-averaged axial and normal velocities,
axial and normal turbulence intensities, and Reynolds stresses. The present results
agree with previous works and provide new information due to the 2-D nature of
the technique, for instance, this work shows that by increasing heat ux, the boiling
bubbles influence on the liquid phase is portrayed as a persistent increase of axial
velocity on regions close to the heater wall. This persistent increase on the axial
velocity reaches a maximum value attributed to the terminal bubble velocity. These
new observed phenomena must be considered for the development and improvement
of two-phase ow turbulence models. To this end, an extensive error analysis was also
performed with emphasis on the applicability of the PTV measurement technique on
optically inhomogeneous flows. The error quantification exhibited negligible optically
induced errors for the current conditions, making the data acquired in this work a
vast and reliable source.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2009-05-699 |
| Date | 16 January 2010 |
| Creators | Estrada Perez, Carlos E. |
| Contributors | Hassan, Yassin A. |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis |
| Format | application/pdf |
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