Numerical Detection of Cavitation Damage on Dam Spillway
The present paper deals with the numerical detection of cavitation damage level and location on dam spillways. At first, flow over a spillway was simulated using the computational fluid dynamics method. The flow characteristics such as pressure, velocity and depth through the spillway have been calculated for five different flow rates. Since the actual flow is turbulent, the RNG turbulence model has been used for simulation. The numerical results of flow characteristics including flow depth, velocity and pressure were compared with the available results of the hydraulic model tests. The numerical results agreed well with the experimental data, and reasonable values for the normalized root mean square error (NRMSE= 0.0476) and coefficient of determination (r2=0.8354) indicated that the numerical model is accurate. Finally occurrence of cavitation damage to the Doosti dam spillway was investigated. Based on cavitation index, five different damage levels from no damage to major damage have been considered. Results showed that the spillway may be at the risk of cavitation damage, and the serious damage can occur at ending parts of the structure.
Chow, V. T. “Open channel hydraulics”. McGraw- Hill Book Comp. New York, N Y, (2009).
Kermani, E. Fadaei, G. A. Barani, and M. Ghaeini-Hessaroeyeh. "Prediction of cavitation damage on spillway using K-nearest neighbor modeling." Water Science and Technology 71, no. 3 (2015): 347-352.
Falvey, H. T. Cavitation in chutes and Spillways. Engineering monograph No. 42, United States Department of the Interior –Bureau of Reclamation, Denver, Colorado, (1990).
Hay, D. "Model prototype correlation: hydraulic structures." J. Hydraul. Eng. 113, no. 8 (1988): 899-907.
Nie, Meng-Xi. "Cavitation prevention with roughened surface." Journal of Hydraulic Engineering 127, no. 10 (2001): 878-880.
Dong, Zhi-yong, and Pei-lan Su. "Cavitation control by aeration and its compressible characteristics." Journal of Hydrodynamics, Ser. B 18, no. 4 (2006): 499-504.
Frizell, K. Warren, Floriana M. Renna, and Jorge Matos. "Cavitation potential of flow on stepped spillways." Journal of Hydraulic Engineering 139, no. 6 (2012): 630-636.
Savage, Bruce M., and Michael C. Johnson. "Flow over ogee spillway: Physical and numerical model case study." Journal of Hydraulic Engineering 127, no. 8 (2001): 640-649.
Qian, ZhongDong, XiaoQing Hu, WenXin Huai, and António Amador. "Numerical simulation and analysis of water flow over stepped spillways." Science in China Series E: Technological Sciences 52, no. 7 (2009): 1958-1965.
Zhenwei, M. U., Zhang Zhiyan, and Z. H. A. O. Tao. "Numerical simulation of 3-D flow field of spillway based on VOF method." Procedia Engineering 28 (2012): 808-812.
Fadaei-Kermani, E., and G. A. Barani. "Numerical simulation of flow over spillway based on the CFD method." Scientia Iranica. Transaction A, Civil Engineering 21, no. 1 (2014): 91.
Hirt, C.W. and Sicilian, J.M., “A Porosity Technique for the Definition of Obstacles in Rectangular Cell Meshes”., Proc. 4th Int. Conf. Ship Hydro, National Academy of Science, Washington, DC, September, (1985): 1-19.
Ho, H., Boyes, K., Donohoo, S. and Cooper, B. “Numerical flow analysis for spillways.” Proc., 43rd ANCOLD Conf., Hobart, Tasmania, (2003): 24–29.
Flow Science, Inc, ”Flow-3D User’s Manuals, Version 9.2”, Santa Fe, NM, (2007): 110-114.
Kermani, E. Fadaei, G. A. Barani, and M. Ghaeini-Hessaroeyeh. "Investigation of cavitation damage levels on spillways." World Applied Sciences Journal 21, no. 1 (2013): 73-78.
Iran Water Research Institute (IWRI). “Doosti Reservoir Dam,”Hydraulic Department, Iran Ministry of Energy, Tehran, (2003).
- There are currently no refbacks.
Copyright (c) 2016 E Fadaei-Kermani, G. A Barani, M Ghaeini-Hessaroeyeh
This work is licensed under a Creative Commons Attribution 4.0 International License.