Scour Reduction by Air Injection: Flow Patterns and Turbulence
| Autor: | Larry Deaton, Brian D. Barkdoll, Juan A. González-Castro, Ted M. Champagne |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Turbulence
Mechanical Engineering Bubble 0208 environmental biotechnology Flow (psychology) 02 engineering and technology Mechanics Flow pattern 01 natural sciences 010305 fluids & plasmas 020801 environmental engineering 0103 physical sciences Geotechnical engineering Acoustic Doppler velocimetry Secondary air injection Geology Water Science and Technology Civil and Structural Engineering Return flow Stilling basin |
| Zdroj: | Journal of Hydraulic Engineering. 142 |
| ISSN: | 1943-7900 0733-9429 |
| DOI: | 10.1061/(asce)hy.1943-7900.0001066 |
| Popis: | Experiments in a stilling basin model with air injected at its downstream end exhibited plunging flow resulting in a downward roller, return flow along the bottom, and a downstream near-bed flow after the plunging flow impingement point. Turbulence measurements showed that air injection reduces turbulence both at the exit of the stilling basin and near the downstream bed. Thus the effect of air injection as a modifier of the turbulence structure of the flow downstream of the stilling basin is postulated as a plausible explanation for the observed scour reduction. |
| Databáze: | OpenAIRE |
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