Publication

Effect of pre-aerated approach flow on delector-generated jets

2011
Conference Papers

Abstract

Flip buckets are terminal spillway elements, generating free jets for energy dissipation. Deflectors are an alternative to flip buckets with constructional ease yet of similar hydraulic features. A first experimental study published at the 33rd IAHR Congress, Vancouver, investigated deflectorgenerated jets in terms of their air concentration characteristics. For jet impact onto a movable bed, the scour potential reduces as the jet air content increases. It was demonstrated that the jet air concentration development is a function of its relative black-water core length, depending on the approach flow parameters and the deflector geometry. Jet-generating structures are located at the end of spillways, where high-speed flow with considerable air transport prevails, affecting the jet parameters, such that additional experiments were conducted involving pre-aerated approach flow. The effect of pre-aeration on the air concentration development of deflector-generated jets is discussed and compared with un-aerated approach flow.

Official source

https://infoscience.epfl.ch/entities/publication/091c3607-565b-455b-8e44-3e6c66b08dfc

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

2011
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/091c3607-565b-455b-8e44-3e6c66b08dfc

About this result

Related concepts (32)

Jet stream

Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of the Earth, Venus, Jupiter, Saturn, Uranus, and Neptune. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds (flowing west to east). Jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including opposite to the direction of the remainder of the jet.

Environmental effects of aviation

Aircraft engines produce gases, noise, and particulates from fossil fuel combustion, raising environmental concerns over their global effects and their effects on local air quality. Jet airliners contribute to climate change by emitting carbon dioxide (), the best understood greenhouse gas, and, with less scientific understanding, nitrogen oxides, contrails and particulates. Their radiative forcing is estimated at 1.3–1.4 that of alone, excluding induced cirrus cloud with a very low level of scientific understanding.

Design of experiments

The design of experiments (DOE or DOX), also known as experiment design or experimental design, is the design of any task that aims to describe and explain the variation of information under conditions that are hypothesized to reflect the variation. The term is generally associated with experiments in which the design introduces conditions that directly affect the variation, but may also refer to the design of quasi-experiments, in which natural conditions that influence the variation are selected for observation.

Related publications (2)

Effect of pre-aerated approach flow on delector-generated jets

Chat with Graph Search

Power exhaust and detachment with varying outer leg length using turbulence simulations and experiments designed for validation

Ceramic cantilever hotplates for devices and testing platforms