Influence of the Flow Rate Ratio in a Jet Pump on the Size of Air Bubbles
In wastewater treatment processes, aeration introduces
air into a liquid. In these systems, air is introduced by different
devices submerged in the wastewater. Smaller bubbles result in more
bubble surface area per unit of volume and higher oxygen transfer
efficiency. Jet pumps are devices that use air bubbles and are widely
used in wastewater treatment processes. The principle of jet pumps is
their ability to transfer energy of one fluid, called primary or motive,
into a secondary fluid or gas. These pumps have no moving parts and
are able to work in remote areas under extreme conditions. The
objective of this work is to study experimentally the characteristics of
the jet pump and the size of air bubbles in the laboratory water tank.
The effect of flow rate ratio on pump performance is investigated in
order to have a better understanding about pump behavior under
various conditions, in order to determine the efficiency of receiving
air bubbles different sizes. The experiments show that we should take
care when increasing the flow rate ratio while seeking to decrease
bubble size in the outlet flow. This study will help improve and
extend the use of the jet pump in many practical applications.
[1] H. J. Hwang, M. K. Stenstrom, “Water Pollution Control Federation”,
57, 12, 1985.
[2] S. Levitsky, L. Grinis. “Water Oxygenation in an Experimental Aerator
with Different Air/Water Interaction Patterns”. HAIT Journal of Science
and Engineering 2, pp. 242-253, 2005.
[3] R. R. Stickney, “Encyclopedia of Aquaculture”, World Aquaculture
Society, USA, 2000.
[4] A. A. Saker, H. Z. Hassan. “Study of the Different Factors That
Influence Jet Pump Performance”. Open Journal of Fluid Dynamics, 3,
pp. 44-49, 2013.
[5] V. P. Sharma, S. Kumaraswamy, A. Mani. “Effect of Various Nozzle
Profiles on Performance of a Two Phase Flow Jet Pump”. World
Academy of Science, Engineering and Technology 6, pp.470-476, 2012.
[6] A. Vazquez, R.M. Sanchez. “A Look at Three Measurement Techniques
for Bubble Size Determination”. Experimental Thermal and Fluid
Science 30, pp.49–57, 2005.
[7] K. K. Al-Ahmady. “Mathematical Model for Calculating Oxygen Mass
Transfer Coefficient in Diffused Air Systems”. Al-Rafidain Engineering.
19, pp. 43-54, 2011.
[8] Y. L. Wu, Q. J. Xiang, “Study on Bubble Sizes in a Down-Flow liquid
Jet Gas Pump”. Earth and Environmental Science 15, pp. 51-60, 2012.
[1] H. J. Hwang, M. K. Stenstrom, “Water Pollution Control Federation”,
57, 12, 1985.
[2] S. Levitsky, L. Grinis. “Water Oxygenation in an Experimental Aerator
with Different Air/Water Interaction Patterns”. HAIT Journal of Science
and Engineering 2, pp. 242-253, 2005.
[3] R. R. Stickney, “Encyclopedia of Aquaculture”, World Aquaculture
Society, USA, 2000.
[4] A. A. Saker, H. Z. Hassan. “Study of the Different Factors That
Influence Jet Pump Performance”. Open Journal of Fluid Dynamics, 3,
pp. 44-49, 2013.
[5] V. P. Sharma, S. Kumaraswamy, A. Mani. “Effect of Various Nozzle
Profiles on Performance of a Two Phase Flow Jet Pump”. World
Academy of Science, Engineering and Technology 6, pp.470-476, 2012.
[6] A. Vazquez, R.M. Sanchez. “A Look at Three Measurement Techniques
for Bubble Size Determination”. Experimental Thermal and Fluid
Science 30, pp.49–57, 2005.
[7] K. K. Al-Ahmady. “Mathematical Model for Calculating Oxygen Mass
Transfer Coefficient in Diffused Air Systems”. Al-Rafidain Engineering.
19, pp. 43-54, 2011.
[8] Y. L. Wu, Q. J. Xiang, “Study on Bubble Sizes in a Down-Flow liquid
Jet Gas Pump”. Earth and Environmental Science 15, pp. 51-60, 2012.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:70027", author = "L. Grinis and N. Lubashevsky and Y. Ostrovski", title = "Influence of the Flow Rate Ratio in a Jet Pump on the Size of Air Bubbles", abstract = "In wastewater treatment processes, aeration introduces
air into a liquid. In these systems, air is introduced by different
devices submerged in the wastewater. Smaller bubbles result in more
bubble surface area per unit of volume and higher oxygen transfer
efficiency. Jet pumps are devices that use air bubbles and are widely
used in wastewater treatment processes. The principle of jet pumps is
their ability to transfer energy of one fluid, called primary or motive,
into a secondary fluid or gas. These pumps have no moving parts and
are able to work in remote areas under extreme conditions. The
objective of this work is to study experimentally the characteristics of
the jet pump and the size of air bubbles in the laboratory water tank.
The effect of flow rate ratio on pump performance is investigated in
order to have a better understanding about pump behavior under
various conditions, in order to determine the efficiency of receiving
air bubbles different sizes. The experiments show that we should take
care when increasing the flow rate ratio while seeking to decrease
bubble size in the outlet flow. This study will help improve and
extend the use of the jet pump in many practical applications.", keywords = "Jet pump, air bubbles size, retention time.", volume = "9", number = "7", pages = "1181-4", }