Publication detail

Modelling of flow over low gradient stepped chutes.

ŠPANO, M.

Original Title

Modelling of flow over low gradient stepped chutes.

Type

conference paper

Language

English

Original Abstract

Modelling of flow over stepped chutes represents a complex problem. Detailed mathematical and dimensional analyses have shown that the flow is affected mainly by gravity, friction, and surface tension forces. So, requirements of dynamical similarity can be satisfied only on prototype (ML = 1). The paper describes practical application which was performed on two physical models of the Bystřička dam chute. Models were built in length scales ML = 10 and ML = 20. A scaling of measured and set parameters was made according to Froude criterion. Results from hydraulic research were compared with results from 2D numerical model of non-aerated turbulent incompressible flow k-?. The basic surveyed properties of flow were regimes of flow, position of the inception point, water and air-water levels and velocity profiles in the axis of the chute. Results of the research have shown that the aeration becomes much earlier in this case (the chute with low gradient of pseudo-bottom and with inlet from spillway channel) compared to published theory. Probable reasons of this effect are discussed closer.

Keywords

stepped chutes, hydraulic research ,Bystřička dam

Authors

ŠPANO, M.

RIV year

2008

Released

30. 7. 2008

Publisher

Edizioni Plus - Pisa university press

Location

Lungarno Pacinotti 56126 Pisa Itálie

ISBN

978-88-8492-568-8

Book

Hydraulic structures: proceedings of the second international junior researcher and engineer workshop on hydraulic structures.

Edition

Edizioni Plus

Edition number

1

Pages from

81

Pages to

88

Pages count

8

BibTex

@inproceedings{BUT34149,
  author="Miroslav {Špano}",
  title="Modelling of flow over low gradient stepped chutes.",
  booktitle="Hydraulic structures: proceedings of the second international junior researcher and engineer workshop on hydraulic structures.",
  year="2008",
  series="Edizioni Plus",
  number="1",
  pages="81--88",
  publisher="Edizioni Plus - Pisa university press",
  address="Lungarno Pacinotti
56126 Pisa
Itálie",
  isbn="978-88-8492-568-8"
}