Details
| Original language | English |
|---|---|
| Title of host publication | 9th AIAA/CEAS Aeroacoustics Conference and Exhibit |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | 9th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2003 - Hilton Head, SC, United States Duration: 12 May 2003 → 14 May 2003 |
Publication series
| Name | 9th AIAA/CEAS Aeroacoustics Conference and Exhibit |
|---|
Abstract
Three-component (3-C) particle image velocimetry (PIV) measurements, within the wake across a rotor disk plane, are used to determine wake vortex definitions important for BVI (Blade Vortex Interaction) and broadband noise prediction. This study is part of the HART II test program conducted using a 40 percent scale BO-105 helicopter main rotor in the German-Dutch Wind Tunnel (DNW). In this paper, measurements are presented of the wake vortex field over the advancing side of the rotor operating at a typical descent landing condition. The orientations of the vortex (tube) axes are found to have non-zero tilt angles with respect to the chosen PIV measurement cut planes, often on the order of 45 degrees. Methods for determining the orientation of the vortex axis and reorienting the measured PIV velocity maps (by rotation/projection) are presented. One method utilizes the vortex core axial velocity component, the other utilizes the swirl velocity components. Key vortex parameters such as vortex core size, strength, and core velocity distribution characteristics are determined from the reoriented PIV velocity maps. The results are compared with those determined from velocity maps that are not corrected for orientation. Knowledge of magnitudes and directions of the vortex axial and swirl velocity components as a function of streamwise location provide a basis for insight into the vortex evolution.
ASJC Scopus subject areas
- Engineering(all)
- Aerospace Engineering
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
9th AIAA/CEAS Aeroacoustics Conference and Exhibit. 2003. (9th AIAA/CEAS Aeroacoustics Conference and Exhibit).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Rotor wake vortex definition using 3C-PIV measurements
T2 - 9th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2003
AU - Burley, Casey L.
AU - Brooks, Thomas F.
AU - van der Wall, Berend
AU - Richard, Hughues
AU - Raffel, Markus
AU - Beaumier, Philippe
AU - Delrieux, Yves
AU - Lim, Joon W.
AU - Yu, Yung H.
AU - Tung, Chee
AU - Pengel, Kurt
AU - Mercker, Edzard
PY - 2003
Y1 - 2003
N2 - Three-component (3-C) particle image velocimetry (PIV) measurements, within the wake across a rotor disk plane, are used to determine wake vortex definitions important for BVI (Blade Vortex Interaction) and broadband noise prediction. This study is part of the HART II test program conducted using a 40 percent scale BO-105 helicopter main rotor in the German-Dutch Wind Tunnel (DNW). In this paper, measurements are presented of the wake vortex field over the advancing side of the rotor operating at a typical descent landing condition. The orientations of the vortex (tube) axes are found to have non-zero tilt angles with respect to the chosen PIV measurement cut planes, often on the order of 45 degrees. Methods for determining the orientation of the vortex axis and reorienting the measured PIV velocity maps (by rotation/projection) are presented. One method utilizes the vortex core axial velocity component, the other utilizes the swirl velocity components. Key vortex parameters such as vortex core size, strength, and core velocity distribution characteristics are determined from the reoriented PIV velocity maps. The results are compared with those determined from velocity maps that are not corrected for orientation. Knowledge of magnitudes and directions of the vortex axial and swirl velocity components as a function of streamwise location provide a basis for insight into the vortex evolution.
AB - Three-component (3-C) particle image velocimetry (PIV) measurements, within the wake across a rotor disk plane, are used to determine wake vortex definitions important for BVI (Blade Vortex Interaction) and broadband noise prediction. This study is part of the HART II test program conducted using a 40 percent scale BO-105 helicopter main rotor in the German-Dutch Wind Tunnel (DNW). In this paper, measurements are presented of the wake vortex field over the advancing side of the rotor operating at a typical descent landing condition. The orientations of the vortex (tube) axes are found to have non-zero tilt angles with respect to the chosen PIV measurement cut planes, often on the order of 45 degrees. Methods for determining the orientation of the vortex axis and reorienting the measured PIV velocity maps (by rotation/projection) are presented. One method utilizes the vortex core axial velocity component, the other utilizes the swirl velocity components. Key vortex parameters such as vortex core size, strength, and core velocity distribution characteristics are determined from the reoriented PIV velocity maps. The results are compared with those determined from velocity maps that are not corrected for orientation. Knowledge of magnitudes and directions of the vortex axial and swirl velocity components as a function of streamwise location provide a basis for insight into the vortex evolution.
UR - http://www.scopus.com/inward/record.url?scp=84894574067&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84894574067
SN - 9781624101021
T3 - 9th AIAA/CEAS Aeroacoustics Conference and Exhibit
BT - 9th AIAA/CEAS Aeroacoustics Conference and Exhibit
Y2 - 12 May 2003 through 14 May 2003
ER -