Correlation Dimension for Pressure Fluctuation in Hydraulic Turbine Draft Tube

A numerical method to simulate three-dimensional incompressible turbulent flows has been developed and applied to the calculation of various flow situations in a draft tube. The conservative form of the primitive-variable formulation of the Reynolds averaged Navier-Stokes equations, written for a general curvilinear co-ordinate system, is employed. An overlapping grid combined with opposed differencing for mass and pressure gradients is used. All the properties are stored at the center of the same computational cell which is used for mass and transport balances. The k–ε model is used to describe the turbulent flow. The boundary conditions for the turbulent properties are treated with a particular attention.

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Computational fluid dynamics simulation and geometric design of hydraulic turbine draft tube

Advances in Mechanical Engineering ◽

10.1177/1687814015606307 ◽

2015 ◽

Vol 7 (10) ◽

pp. 168781401560630 ◽

Cited By ~ 4

Author(s):

JB Sosa ◽

G Urquiza ◽

JC García ◽

LL Castro

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Draft Tube ◽

Hydraulic Turbine ◽

Geometric Design ◽

Dynamics Simulation ◽

Computational Fluid Dynamics Simulation ◽

Hydraulic Turbine Draft Tube

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A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model

Power Technology and Engineering ◽

10.1007/s10749-016-0650-6 ◽

2016 ◽

Vol 50 (1) ◽

pp. 1-5 ◽

Cited By ~ 5

Author(s):

I. V. Litvinov ◽

A. S. Mitryakov ◽

S. I. Shtork

Keyword(s):

Transient Flow ◽

Draft Tube ◽

Hydraulic Turbine ◽

Tube Model ◽

Hydraulic Turbine Draft Tube

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Three-Dimensional Unsteady Turbulent Simulation and Analysis of Pressure Fluctuation in the Prototype Kaplan Turbine

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2006-98171 ◽

2006 ◽

Author(s):

Shangfeng Wu ◽

Yulin Wu ◽

Shuhong Liu

Keyword(s):

Turbulent Flow ◽

Simulation Model ◽

Pressure Fluctuation ◽

Draft Tube ◽

Three Dimensional ◽

Hydroelectric Station ◽

Hydraulic Turbine ◽

Fujian Province ◽

Flow Passage ◽

Kaplan Turbine

In recent years, stability research of the hydraulic turbine has been one of the most important problems of analysis of the large turbines. In this paper, the simulation model is based on the large prototype Kaplan turbine of the Shuikou hydroelectric station in Fujian Province, China. The three-dimensional unsteady turbulent flow is simulated through the whole flow passage of the turbine mainly by FLUENT, and pressure fluctuation of several points in the passage are measured including the front of the stay vane, runner and the front of the draft tube, meanwhile, the frequency and amplitude of the pressure fluctuation are gained by FFT transform, through that we can find the source of the pressure fluctuation, therefore we will discuss the occurrence reason and spread elements of the pressure fluctuation in the flow passage of the turbine.

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