The Numerical Simulation of Aerated Cavity Length and Negative Pressure on Stepped Spillway Combined with Y-Shape Asymmetrical Flaring Gate Pier

Abstract:

In order to study the aerated cavity length and negative pressure on stepped spillway which combined with Y-shape asymmetric flaring gate pier body type, this paper applied RNG turbulence model,VOF model of water vapor two-phase, iterative solution of geometry reconstruction format of unsteady flow to generate free surface. Numerically simulated the length of aerated cavity and negative pressure of stepped spillway which combined with asymmetrical Y-shape flaring gate pier that with the contraction ratio respectively of 598, 0.497 and 0.445, the range from the upstream reservoir to downstream stilling basin. And compared the simulation results with experimental results, found that the aerated cavity length on steps basically consistent with the measured cavity length, the maximum error is 9.7%. The simulation results shows that the aeration cavity length on steps increases with asymmetric flaring gate pier contraction ratio decreases, and the aerated cavity length of lateral side with smaller contraction angle is larger 4 to 5 times than lateral side with larger contraction angle.

• Periodical: Advanced Materials Research (Volumes 864-867)
• Pages: 2185-2192
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.864-867.2185
• Online since: December 2013
• Authors: Xiao Xia Hou, Ju Rui Yang*, Jian Shu Zhen
• Keywords: Aerated Cavity, Contraction Ratio, Flaring Gate Pier, Negative Pressure, Stepped Spillway

References

[1] Z.X. LI, J.B. YIN, Z. ZHENG, H. LU. Aeration of Skimming Flow on Stepped Spillway Combined with Flaring Gate Piers [J], Journal of Hydraulic Engineering, 2009, 5(40): 564～568 (in Chinese).

[2] H.Y. WANG,Z.Y. XU,G.Q. DAI,T.B. WANG,G.H. DUAN. Journal of Yangtze River, 2010, 3（41): 96～98(in Chinese).

[3] J.X. ZHANG, Y.M. XU,Y.J. SHU,W.W. CHU,Y. WANG,Y. RONG. Study on the Cavity Length Over the Chute with an Anti-arc Section[J] , South-to-North Water Transfers and Water Science ＆Technology. 2012, 5（10）: 80～83. (in Chinese).

[4] T. ZHANG,H.W. BAI,Y.M. XU, et al: Experimental Study of the Effect of Air Vent on the Length of Cavity of Aerators[J], South-to-North Water Transfers and Water Science ＆Technology. 2010, 5（8）: 58～60. (in Chinese).

[5] Y,H. Hu, C . Wu, H. Lu, et al: Affect Factors Analysis of Aerated Cavity of X-shaped Flaring Gate Pier[J], Journal of Hydraulic Engineering, 2007，3（39）：24~28．(in Chinese).