Aeroacoustics of Turbulent Jets : Flow Structure, Noise Sources, and Control(<Special Issue>Jets, Wakes and Separated Flows)

スポンサーリンク

概要

• 論文の詳細を見る

• The paper reviews research performed to advance the understanding of state-of-the-art technologies capable of reducing coaxial jet noise simulating the exhaust flow of turbofan engines. The review focuses on an emerging jet noise passive control technology known as chevron nozzles. The fundamental physical mechanisms responsible for the acoustic benefits provided by these nozzles are discussed. Additionally, the relationship between these physical mechanisms and some of the primary chevron geometric parameters are highlighted. Far-field acoustic measurements over a wide range of nozzle operating conditions illustrated the ability of the chevron nozzles to provide acoustic benefits. Detailed mappings of the acoustic near-field provided more insight into the chevron noise suppression mechanisms by successfully identifying two primary chevron effects consistent with the results of the far-field measurements: chevrons penetration and shear velocity across them. Mean and turbulence data identified the physical flow mechanisms responsible for the effects documented in the far- and near-field studies.

• 一般社団法人日本機械学会の論文
• 2006-11-15

著者

• Martens Steve

  Ge Aviation

• GUTMARK Ephraim

  Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati

• CALLENDER Bryan

  GE Aviation

• Gutmark Ephraim

  Department Of Aerospace Engineering And Engineering Mechanics University Of Cincinnati

関連論文

• Aeroacoustics of Turbulent Jets : Flow Structure, Noise Sources, and Control(Jets, Wakes and Separated Flows)
• Linear Stochastic Estimation of the Velocity Field from a High-Bypass Nozzle with and without Mixing Devices

スポンサーリンク