Details
| Original language | English |
|---|---|
| Title of host publication | 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference) |
| Number of pages | 16 |
| Publication status | Published - 4 Nov 2012 |
| Event | 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference) - Stockholm, Sweden Duration: 7 Jun 2010 → 9 Jun 2010 |
Publication series
| Name | 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference) |
|---|
Abstract
This paper deals with an experimental investigation of two low-speed airfoils in tandem arrangement for a noise reduction study. The upstream airfoil of that tandem is equipped with a blowing slot on its suction side through which momentum is injected into the airfoil wake. This situation corresponds to a simplified rotor-stator arrangement and investigates the possibilities of wake manipulation and associated broadband noise reduction. The primary goal is to fill the wake sufficiently with momentum and thereby reduce the mean wake deficit, which is the cause of tonal noise in a rotor-stator stage. At the same time it is desired to also reduce the wake turbulence so that the broadband interaction noise resulting from the impingement of the turbulent wake on the downstream stator vane or airfoil is reduced. Different blowing geometries and blowing mass-flow rates are investigated using particle image velocimetry, leading edge surface pressure measurements, wake hot-wire measurements and finally acoustic far-field measurements. The major aim of this study is to quantify the possible broadband noise reduction and to identify the difference between alternative blowing designs.
ASJC Scopus subject areas
- Engineering(all)
- Aerospace Engineering
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference). 2012. 2010-3981 (16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference)).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Trailing-Edge Blowing on Tandem Airfoils
T2 - 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference)
AU - Winkler, Julian
AU - Carolus, Thomas
AU - Scheuerlein, Jörg
AU - Dinkelacker, Friedrich
PY - 2012/11/4
Y1 - 2012/11/4
N2 - This paper deals with an experimental investigation of two low-speed airfoils in tandem arrangement for a noise reduction study. The upstream airfoil of that tandem is equipped with a blowing slot on its suction side through which momentum is injected into the airfoil wake. This situation corresponds to a simplified rotor-stator arrangement and investigates the possibilities of wake manipulation and associated broadband noise reduction. The primary goal is to fill the wake sufficiently with momentum and thereby reduce the mean wake deficit, which is the cause of tonal noise in a rotor-stator stage. At the same time it is desired to also reduce the wake turbulence so that the broadband interaction noise resulting from the impingement of the turbulent wake on the downstream stator vane or airfoil is reduced. Different blowing geometries and blowing mass-flow rates are investigated using particle image velocimetry, leading edge surface pressure measurements, wake hot-wire measurements and finally acoustic far-field measurements. The major aim of this study is to quantify the possible broadband noise reduction and to identify the difference between alternative blowing designs.
AB - This paper deals with an experimental investigation of two low-speed airfoils in tandem arrangement for a noise reduction study. The upstream airfoil of that tandem is equipped with a blowing slot on its suction side through which momentum is injected into the airfoil wake. This situation corresponds to a simplified rotor-stator arrangement and investigates the possibilities of wake manipulation and associated broadband noise reduction. The primary goal is to fill the wake sufficiently with momentum and thereby reduce the mean wake deficit, which is the cause of tonal noise in a rotor-stator stage. At the same time it is desired to also reduce the wake turbulence so that the broadband interaction noise resulting from the impingement of the turbulent wake on the downstream stator vane or airfoil is reduced. Different blowing geometries and blowing mass-flow rates are investigated using particle image velocimetry, leading edge surface pressure measurements, wake hot-wire measurements and finally acoustic far-field measurements. The major aim of this study is to quantify the possible broadband noise reduction and to identify the difference between alternative blowing designs.
UR - http://www.scopus.com/inward/record.url?scp=78649584674&partnerID=8YFLogxK
U2 - 10.2514/6.2010-3981
DO - 10.2514/6.2010-3981
M3 - Conference contribution
AN - SCOPUS:78649584674
SN - 9781600867446
T3 - 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference)
BT - 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference)
Y2 - 7 June 2010 through 9 June 2010
ER -