Performance Evaluation and Modeling of a Conical Plunging Jet Aerator
Aeration by a plunging water jet is an energetically attractive way to effect oxygen-transfer than conventional oxygenation systems. In the present study, a new type of conical shaped plunging aeration device is fabricated to generate hollow inclined ined plunging jets (jet plunge angle of π/3 ) to investigate its oxygen transfer capacity. The results suggest that the volumetric oxygen-transfer coefficient and oxygen-transfer efficiency of the conical plunging jet aerator are competitive with other types of aeration systems. Relationships of volumetric oxygen-transfer coefficient with jet power per unit volume and jet parameters are also proposed. The suggested relationships predict the volumetric oxygentransfer coefficient within a scatter of ± 15% . Further, the application of Support Vector Machines on the experimental data revealed its utility in the prediction of volumetric oxygen-transfer coefficient and development of conical plunging jet aerators.
[1] D. A. Ervine, E. McKeogh, and E. M. Elsawy, "Effect of turbulence
intensity on the rate of air entrainment by plunging water jets", Proc.
Instn civil Engrs., Part 2, vol. 69, pp. 425-445, 1980.
[2] A. K. Bin, "Gas entrainment by plunging liquid jets", Chem. Eng. Sci. J.
Great Britain, vol. 48, pp. 3585-3630, 1993.
[3] P. D. Cummings, and H. Chanson, "Air entrainment in the developing
flow region of plunging jets-part 1: theoretical development", Fluids
Eng. J. ASME, vol. 119, pp. 597-602, 1997.
[4] H. Chanson, S. Aoki, and A. Hoque, "Similitude of air entrainment at
vertical circular plunging jets", in Proc. ASME FEDSM-02, Montreal,
Quebec, 2002, pp. 1-6.
[5] H. Chanson, S. Aoki, and A. Hoque, "Physical modelling and similitude
of air bubble entrainment at vertical circular plunging jets", Chem. Eng.
Sc., vol. 59, pp. 747-758, 2004.
[6] S. M. Leung, J. C. Little, T. Hoist, and N.G. Love, "Air/water oxygen
transfer in a biological aerated filter", J. Environmental Eng., vol. 132,
pp. 181-189, 2006.
[7] D. Kusabiraki, H. Niki K. Yamagiwa, and A. Ohkawa, "Gas entrainment
rate and flow pattern of vertical plunging liquid jets", The Canadian J.
Chem. Eng., vol. 68, pp. 893-903, 1990.
[8] M. E. Emiroglu, and A. Baylar, "Study of the influence of air holes
along length of convergent-divergent passage of a venture device on
aeration", J. Hyd. Res., vol. 41, pp. 513-520, 2003.
[9] A. Ahmed, "Aeration by plunging liquid jet", Ph.D. thesis,
Loughborough Univ. of Tech. UK, 1974.
[10] E. van de Sande, and J. .M. Smith, "Mass transfer from plunging water
jets", Chem. Eng. J. Netherlands, vol. 10, pp. 225-233, 1975.
[11] J. A. C. van de Donk, "Water aeration with plunging jets", Ph.D. thesis,
Technische Hogeschool Delft, Netherlands, 1981.
[12] K. Tojo, and K. Miyanami, "Oxygen transfer in jet mixers", Chem. Eng.
J. Netherlands, vol. 24, pp. 89-97, 1982.
[13] K. Tojo, N. Naruko, and K. Miyanami, "Oxygen transfer and liquid
mixing characteristics of plunging jet reactors", Chem. Eng. J.
Netherlands, vol. 25, pp. 107-109, 1982.
[14] A. K. Bin, and J. M. Smith, "Mass transfer in a plunging liquid jet
absorber", Chem. Engng. Commun, vol. 15, pp. 367-383, 1982.
[15] D. Bonsignore, G. Volpicelli, A. Campanile, L. Santoro, and R.
Valentino, "Mass transfer in plunging jet absorbers", Chem. Eng.
Process, vol. 19, pp. 85-94, 1985.
[16] A. Ohkawa, D. Kusabiraki, Y. Shiokawa, M. Sakal, and M. Fujii, "Flow
and oxygen transfer in a plunging water system using inclined short
nozzles in performance characteristics of its system in aerobic treatment
of wastewater", Biotech. Bioeng., vol. 28, pp. 1845-1856, 1986.
[17] K. Funatsu, Y. Ch. Hsu, M. Noda, and S. Sugawa, "Oxygen transfer in
the water jet vessel", Chem. Eng. Commun., vol. 73. pp. 121-139, 1988.
[18] K. Yamagiwa, A. Ito, Y. Kato, M. Yoshida, and A. Ohkawa, "Effects of
liquid property on air entrainment and oxygen transfer rates of plunging
jet reactor", J. Chem. Eng. Japan, vol. 34, pp. 506-512, 2001.
[19] A. Ahmed, and J. Glover, Conf. on Farm Wastes Disposal, Glasgow,
Sept. 1972. In E. van de Sande, and J. M. Smith, "Mass transfer from
plunging water jets", Chem. Eng. J. Netherlands, vol. 10, pp.225-233,
1975.
[20] H. Chanson, and T. Brattberg, "Air entrainment by two-dimensional
plunging jets: the impingement region and the very-near flow field", in
Proc. ASME FEDSM-98. Washington DC, 1998, pp. 1-8.
[21] T. Bagatur, A. Baylar, and N. Sekardag, "The effect of nozzle type on air
entrainment by plunging water jets", Water Qual. Res. J. Canada, vol.
37, pp. 599-612, 2002.
[22] E. I. Daniil, and J. S. Gulliver, "Temperature dependence of liquid film
coefficient for gas transfer, J. Environ. Eng., vol. 114, pp. 1224-1229,
1988.
[23] APHA, AWWA, WEF, Standard methods for the examination of water
and wastewater. APHA Washington DC, 2005, pp. 4.38 - 4.140.
[1] D. A. Ervine, E. McKeogh, and E. M. Elsawy, "Effect of turbulence
intensity on the rate of air entrainment by plunging water jets", Proc.
Instn civil Engrs., Part 2, vol. 69, pp. 425-445, 1980.
[2] A. K. Bin, "Gas entrainment by plunging liquid jets", Chem. Eng. Sci. J.
Great Britain, vol. 48, pp. 3585-3630, 1993.
[3] P. D. Cummings, and H. Chanson, "Air entrainment in the developing
flow region of plunging jets-part 1: theoretical development", Fluids
Eng. J. ASME, vol. 119, pp. 597-602, 1997.
[4] H. Chanson, S. Aoki, and A. Hoque, "Similitude of air entrainment at
vertical circular plunging jets", in Proc. ASME FEDSM-02, Montreal,
Quebec, 2002, pp. 1-6.
[5] H. Chanson, S. Aoki, and A. Hoque, "Physical modelling and similitude
of air bubble entrainment at vertical circular plunging jets", Chem. Eng.
Sc., vol. 59, pp. 747-758, 2004.
[6] S. M. Leung, J. C. Little, T. Hoist, and N.G. Love, "Air/water oxygen
transfer in a biological aerated filter", J. Environmental Eng., vol. 132,
pp. 181-189, 2006.
[7] D. Kusabiraki, H. Niki K. Yamagiwa, and A. Ohkawa, "Gas entrainment
rate and flow pattern of vertical plunging liquid jets", The Canadian J.
Chem. Eng., vol. 68, pp. 893-903, 1990.
[8] M. E. Emiroglu, and A. Baylar, "Study of the influence of air holes
along length of convergent-divergent passage of a venture device on
aeration", J. Hyd. Res., vol. 41, pp. 513-520, 2003.
[9] A. Ahmed, "Aeration by plunging liquid jet", Ph.D. thesis,
Loughborough Univ. of Tech. UK, 1974.
[10] E. van de Sande, and J. .M. Smith, "Mass transfer from plunging water
jets", Chem. Eng. J. Netherlands, vol. 10, pp. 225-233, 1975.
[11] J. A. C. van de Donk, "Water aeration with plunging jets", Ph.D. thesis,
Technische Hogeschool Delft, Netherlands, 1981.
[12] K. Tojo, and K. Miyanami, "Oxygen transfer in jet mixers", Chem. Eng.
J. Netherlands, vol. 24, pp. 89-97, 1982.
[13] K. Tojo, N. Naruko, and K. Miyanami, "Oxygen transfer and liquid
mixing characteristics of plunging jet reactors", Chem. Eng. J.
Netherlands, vol. 25, pp. 107-109, 1982.
[14] A. K. Bin, and J. M. Smith, "Mass transfer in a plunging liquid jet
absorber", Chem. Engng. Commun, vol. 15, pp. 367-383, 1982.
[15] D. Bonsignore, G. Volpicelli, A. Campanile, L. Santoro, and R.
Valentino, "Mass transfer in plunging jet absorbers", Chem. Eng.
Process, vol. 19, pp. 85-94, 1985.
[16] A. Ohkawa, D. Kusabiraki, Y. Shiokawa, M. Sakal, and M. Fujii, "Flow
and oxygen transfer in a plunging water system using inclined short
nozzles in performance characteristics of its system in aerobic treatment
of wastewater", Biotech. Bioeng., vol. 28, pp. 1845-1856, 1986.
[17] K. Funatsu, Y. Ch. Hsu, M. Noda, and S. Sugawa, "Oxygen transfer in
the water jet vessel", Chem. Eng. Commun., vol. 73. pp. 121-139, 1988.
[18] K. Yamagiwa, A. Ito, Y. Kato, M. Yoshida, and A. Ohkawa, "Effects of
liquid property on air entrainment and oxygen transfer rates of plunging
jet reactor", J. Chem. Eng. Japan, vol. 34, pp. 506-512, 2001.
[19] A. Ahmed, and J. Glover, Conf. on Farm Wastes Disposal, Glasgow,
Sept. 1972. In E. van de Sande, and J. M. Smith, "Mass transfer from
plunging water jets", Chem. Eng. J. Netherlands, vol. 10, pp.225-233,
1975.
[20] H. Chanson, and T. Brattberg, "Air entrainment by two-dimensional
plunging jets: the impingement region and the very-near flow field", in
Proc. ASME FEDSM-98. Washington DC, 1998, pp. 1-8.
[21] T. Bagatur, A. Baylar, and N. Sekardag, "The effect of nozzle type on air
entrainment by plunging water jets", Water Qual. Res. J. Canada, vol.
37, pp. 599-612, 2002.
[22] E. I. Daniil, and J. S. Gulliver, "Temperature dependence of liquid film
coefficient for gas transfer, J. Environ. Eng., vol. 114, pp. 1224-1229,
1988.
[23] APHA, AWWA, WEF, Standard methods for the examination of water
and wastewater. APHA Washington DC, 2005, pp. 4.38 - 4.140.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:58702", author = "Surinder Deswal and D. V. S. Verma", title = "Performance Evaluation and Modeling of a Conical Plunging Jet Aerator", abstract = "Aeration by a plunging water jet is an energetically attractive way to effect oxygen-transfer than conventional oxygenation systems. In the present study, a new type of conical shaped plunging aeration device is fabricated to generate hollow inclined ined plunging jets (jet plunge angle of π/3 ) to investigate its oxygen transfer capacity. The results suggest that the volumetric oxygen-transfer coefficient and oxygen-transfer efficiency of the conical plunging jet aerator are competitive with other types of aeration systems. Relationships of volumetric oxygen-transfer coefficient with jet power per unit volume and jet parameters are also proposed. The suggested relationships predict the volumetric oxygentransfer coefficient within a scatter of ± 15% . Further, the application of Support Vector Machines on the experimental data revealed its utility in the prediction of volumetric oxygen-transfer coefficient and development of conical plunging jet aerators.
", keywords = "Conical plunging jet, oxygen-transfer efficiency, support vector machines, volumetric oxygen-transfer coefficient.", volume = "1", number = "11", pages = "660-5", }
