LDA Measurements of the flow behind a hydraulic structure

• Type: Article in International Conference Proceedings Book
• Date: 2004

Authors

Rodrigo Maia (Author) FEUP; Ana Sá Lopes (Author) FEUP; Juliana Loureiro (Author) Other; Fernanda Proença (Author) FEUP

Conference proceedings International

Title: 10th Brazilian Congress of Thermal Sciences and Engineering - EMCIT 2004

Pages: 1-10

10th Brazilian Congress of Thermal Sciences and Engineering – EMCIT 2004

Rio de Janeiro, Brazil, Nov. 29-Dec. 03 2004

Scientific classification

FOS: Engineering and technology

Other information

Abstract (EN): The energy dissipation behind a hydraulic structure was experimentally studied with the aid of Laser-Doppler anemometry. Special attention has been given to the investigation of the behaviour of the rock protection bed in response to a variety of flow conditions. The flow field over the rip-rap was studied in order to asses its efficiency in preventing damage to the foundations of the hydraulic structure as well as in protecting the river bed from erosion. To conduct this study, measurements of mean velocity and turbulence intensities were carried out using laser-Doppler anemometry. A detailed description of the experimental apparatus and instrumentation is given in a specific section. The results obtained are compared with the empirical laws available in literature. Discrepancies between the theoretical predictions and the measured scour profiles were observed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10