Stochastic analysis of water hammer considering unsteady friction

Author

Jian, Yuan ; Ming, Hu ; Jin, Shu

Author_Institution

Coll. of Water Conservancy & Hydropower Eng., Hohai Univ., Nanjing, China

fYear

2009

fDate

6-7 April 2009

Firstpage

1

Lastpage

4

Abstract

Stochastic analysis of water hammer is greatly needed in hydropower structural reliability design. However, the effect of friction on stochastic analysis of transient flow has been often neglected in previous studies. In this study, a random model of water hammer considering unsteady friction was introduced and moment characteristic method was proposed for numerical calculation. A computational example shows that the maximum piezometric head of unsteady friction model agrees with that of steady friction model. Furthermore, the unsteady friction model fits better with respect to the simulation of the fluctuation process of water hammer.

Keywords

friction; hydroelectric power stations; impact (mechanical); method of moments; random processes; reliability; stochastic processes; structural engineering; hydropower structural reliability design; moment characteristic method; piezometric head; steady friction model; stochastic analysis; transient flow; unsteady friction model; water hammer; Blades; Friction; Hydroelectric power generation; Power generation; Reservoirs; Stochastic processes; Transient analysis; Water conservation; Water resources; Water storage; moment characteristics method; random model; unsteady friction; water hammer;

fLanguage

English

Publisher

ieee

Conference_Titel

Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4934-7

Type

conf

DOI

10.1109/SUPERGEN.2009.5348031

Filename

5348031