Title :
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
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;
Conference_Titel :
Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4934-7
DOI :
10.1109/SUPERGEN.2009.5348031
