Reoxygenation by Free, Wall-Supported, and Plate-Supported Rectangular Jets Plunging into a Quiescent Pool
Publication: Journal of Environmental Engineering
Volume 143, Issue 8
Abstract
This paper presents the results of oxygen transfer properties of a free, wall-supported, and plate-supported plunging rectangular jet. Consistently, the free jet had the highest values of oxygen transfer coefficient, ; wall-supported and plate-supported jets were typically 0.93 and 0.74 times that of the free jet, respectively. At constant jet height and jet velocity , decreases as the water depth in the pool increases for all types of jets. This is attributed to a decrease in the air/water interface, also known as the contact area, as volume increases. An optimum water depth, , can be inferred for all three supports below which decreases due to the bubble plume impinging on the bottom of the pool. For varying and , increases with the former while a power relationship is observed between and the latter for all supported jets. Ultimately, for each type of support an empirical equation based on the properties of the jet and the pool is proposed.
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Acknowledgments
The authors appreciate the technical support provided by S. Nikolic.
References
APHA, AWWA, and WEF (American Public Health Association and American Water Works Association, and Water Pollution Control Federation). (1985). “Standard methods for the examination of water and wastewater.” Washington, DC.
ASCE. (1997). “Standard guidelines for in-process oxygen transfer testing.”, New York.
Ashley, K., Fattah, K., Mavinic, D., and Kosari, S. (2013). “Analysis of design factors influencing the oxygen transfer of a pilot-scale speece cone hypolimnetic aerator.” J. Environ. Eng., .
Avery, S. T. (1976). “The transfer of oxygen from air entrained by jets entering a free water recipient.” Ph.D. thesis, Univ. of Newcastle Upon Tyne, Newcastle Upon Tyne, U.K.
Avery, S. T., and Novak, P. (1978). “Oxygen transfer at hydraulic structures.” J. Hydraul. Div., 104(11), 1521–1540.
Bagatur, T. (2009). “Evaluation of preaeration with V-notch weir and cascade structures in clarifiers.” J. Environ. Eng., 176–184.
Banks, R., Wickramanayake, G., and Lohani, B. (1984). “Effect of rain on surface reaeration.” J. Environ. Eng., 1–14.
Baylar, A., and Emiroglu, M. E. (2004). “An experimental study of air entrainment and oxygen transfer at a water jet from a nozzle with air holes.” Water Environ. Res., 76(3), 231–237.
Biń, A. K. (1993). “Gas entrainment by plunging liquid jets.” Chem. Eng. Sci., 48(21), 3585–3630.
Bonetto, F., and Lahey, R. T., Jr. (1993). “An experimental study on air carryunder due to a plunging liquid jet.” Int. J. Multiphase Flow, 19(2), 281–294.
Chanson, H., Aoki, S., and Hoque, A. (2002). “Similitude of air-entrainment at vertical circular plunging jets.” ASME 2002 Joint U.S.—European Fluids Engineering Division Conf., ASME, New York, 467–472.
Chanson, H., Aoki, S., and Hoque, A. (2004). “Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets.” Chem. Eng. Sci., 59(4), 747–758.
Chipongo, K., and Khiadani, M. (2016). “Oxygen transfer by multiple vertical plunging jets in tandem.” J. Environ. Eng., .
Cummings, P. D., and Chanson, H. (1997). “Air entrainment in the developing flow region of plunging jets—Part 1: Theoretical development.” J. Fluids Eng., 119(3), 597–602.
Daniil, E. I., and Gulliver, J. S. (1988). “Temperature dependence of liquid film coefficient for gas transfer.” J. Environ. Eng., 1224–1229.
Deswal, S. (2008). “Oxygen transfer by multiple inclined plunging water jets.” Int. J. Civ. Environ. Struct. Constr. Archit. Eng., 2(3), 57–63.
Deswal, S., and Verma, D. V. S. (2007). “Performance evaluation and modeling of a conical plunging jet aerator.” Int. J. Mech. Aerosp. Ind. Mech. Manuf. Eng., 1(11), 616–620.
Emiroglu, M. E., and Baylar, A. (2003). “Study of the influence of air holes along length of convergent-divergent passage of a Venturi device on aeration.” J. Hydraul. Res., 41(5), 513–520.
Gulliver, J. S., and Rindels, A. J. (1993). “Measurement of air-water oxygen transfer at hydraulic structures.” J. Hydraul. Eng., 327–349.
Gulliver, J. S., Wilhelms, S. C., and Parkhill, K. L. (1998). “Predictive capabilities in oxygen transfer at hydraulic structures.” J. Hydraul. Eng., 664–671.
Ice, G. G. (1978). “Reaeration in a turbulent stream system.” Ph.D. thesis, Oregon State Univ., Corvallis, OR.
Jahromi, M. E., and Khiadani, M. (2017). “Experimental study on oxygen transfer capacity of water jets discharging into turbulent cross-flow.” J. Environ. Eng., .
Kim, J., and Walters, R. (2001). “Oxygen transfer at low drop weirs.” J. Environ. Eng., 604–610.
Kobus, H., and Koschitzky, H. (1991). “Local surface aeration at hydraulic structures.” IAHR hydraulic structures design manuals 4, A.A. Balkema, Rotterdam, Netherlands.
Leung, S., Little, J., Holst, T., and Love, N. (2006). “Air/water oxygen transfer in a biological aerated filter.” J. Environ. Eng., 181–189.
Lewis, W. K., and Whitman, W. G. (1924). “Principles of gas absorption.” Ind. Eng. Chem., 16(12), 1215–1220.
Mackenthun, A. A., and Heinz, G. S. (1998). “Effect of flow velocity on sediment oxygen demand: Experiments.” J. Environ. Eng., 222–230.
Nakasone, H. (1987). “Study of aeration at weirs and cascades.” J. Environ. Eng., 64–81.
Negulescu, M., and Rojanski, V. (1969). “Recent research to determine reaeration coefficient.” Water Res., 3(3), 189–202.
Singh, S., Deswal, S., and Pal, M. (2011). “Performance analysis of plunging jets having different geometries.” Int. J. Environ. Sci., 1(6), 1154–1167.
Tchobanoglous, G., and Burton, F. L. (1991). Wastewater engineering: Treatment, disposal and reuse, 3rd Ed., McGraw-Hill, New York.
Tojo, K., and Miyanami, K. (1982). “Oxygen transfer in jet mixers.” Chem. Eng. J., 24(1), 89–97.
Van der Kroon, G. T. M., and Schram, A. H. (1969). “Weir aeration—Part 1: Single free fall.” , 2(22), 528–537.
Van de Sande, E., and Smith, J. M. (1975). “Mass transfer from plunging water jets.” Chem. Eng. J., 10(2), 225–233.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 143 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jul 6, 2016
Accepted: Jan 10, 2017
Published online: Mar 29, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 29, 2017
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