Aeration is one of the most practical and economical methods for prevention of cavitation attack in high speed flows. Many research works are conducted on aerators. Although a general method is not available for aerator design, many aerators are designed and constructed all over the world. Cavitation danger in tunnels also makes the designers to consider aerators for tunnels. Since tunnel sections are usually circular or horse shoe, a specific type of aerator is required for tunnels. Lack of information on application of aerators in tunnels makes some of designers to change the tunnel section to rectangular by subsequent concrete operation and then design the same type of aerators used in spillways. This method is expensive and time consuming. In the present work, annular aerators are studied in a physical model of a tunnel with horse shoe section. The effect of aerator geometry on jet length and spray formation is studied. Experimental results showed that to reduce spray formation, the aerator geometry should follow the tunnel section. It was also concluded that to reduce spray formation in the range of Froude numbers tested, it is better to keep the ramp angle less than 5 degrees. To increase the jet length and efficiency of the aerator, the ramp height should also be increased.
Ostad Mirza, M., Zarrati, A., Roshan, R., Safavi, K., & Sarkardeh, H. (2011). Annular Aerators in Tunnels with Horse shoe section. Journal of Hydraulics, 6(2), 87-100. doi: 10.30482/jhyd.2011.85498
MLA
M.J. Ostad Mirza; A.R. Zarrati; R. Roshan; K. Safavi; H. Sarkardeh. "Annular Aerators in Tunnels with Horse shoe section". Journal of Hydraulics, 6, 2, 2011, 87-100. doi: 10.30482/jhyd.2011.85498
HARVARD
Ostad Mirza, M., Zarrati, A., Roshan, R., Safavi, K., Sarkardeh, H. (2011). 'Annular Aerators in Tunnels with Horse shoe section', Journal of Hydraulics, 6(2), pp. 87-100. doi: 10.30482/jhyd.2011.85498
VANCOUVER
Ostad Mirza, M., Zarrati, A., Roshan, R., Safavi, K., Sarkardeh, H. Annular Aerators in Tunnels with Horse shoe section. Journal of Hydraulics, 2011; 6(2): 87-100. doi: 10.30482/jhyd.2011.85498
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