Simulation of Unsteady Water Film Flow on Pelton Bucket ()
Abstract
In order to simulate the complicated unsteady flow in Pelton bucket, it is necessary to apply the animated cartoon approach. In this paper, a free jet and the inner surface of a bucket is described by boundary fitted grid (BFG) with non-orthogonal curvilinear coordinates. The water flow is discretized in space and time for CFD (computational fluid dynamics). The moving grids of water film are successfully projected onto the bucket’s inner surface by a projection algorithm. The visualization result of the jet landing on bucket’s surface and the unsteady flow in the rotating buckets in 3D verifies the effectiveness of the proposed method.
Share and Cite:
S. Na, "Simulation of Unsteady Water Film Flow on Pelton Bucket,"
Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 51-55. doi:
10.4236/epe.2013.54B010.
Conflicts of Interest
The authors declare no conflicts of interest.
References
|
[1]
|
T. Kubota and Y. Nakanishi, “Classification of Flow in Pelton Turbines for Study of Scale Effect,”17th IAHR-Symposium, Beijing, Vol. G-6, 1994, pp. 865-876.
|
|
[2]
|
T. Kubota, J. Xia, H. Takeuchi, et al., “Numerical Analysis of Free Water Sheet Flow on Pelton Buckets,” Proceedings of 19th IAHR Symposium, Singapore, 1998, pp. 316-329.
|
|
[3]
|
J. Liu, C. X. Wei and F. Q. Han, “Effect of Enlarged Free Jet on Energy Conversion in Pelton Turbine,” Journal of Hydrodynamics, Series B, Vol. 18, No. 2, 2006, pp. 211-218.
|
|
[4]
|
A. L. Zheng, F. Q. Han, Y. X. Xiao, et al., “Unsteady Interference between Jet and Rear Surface of Rotating Buckets in Pelton Turbine,” 8th Asian International Fluid Machinery Conference, Yichang, China, 2005, pp. 302-310.
|
|
[5]
|
N. Shen and T. Kubota, “Curved Surface of Pelton Bucket Based on Differential Geometry,”APPEEC2012, Shanghai, Vol. 3, 2012.
|
|
[6]
|
F. Q. Han, N. Shen, L. X. Li, et al., “Unsteady Separation of Jet Branch by Cutout of Rotating Pelton Bucket,” SCIENCE CHINE Technological Science, Vol. 54, No. 2, 2011, pp. 302-310. doi:10.1007/s11431-010-4263-2
|