MECHANISMS AND ACOUSTICS OF BLADE-VORTEX- INTERACTIONS

Citation
S. Korber et J. Ballmann, MECHANISMS AND ACOUSTICS OF BLADE-VORTEX- INTERACTIONS, Zeitschrift fur Flugwissenschaften und Weltraumforschung, 19(6), 1995, pp. 397-406
Citations number
NO
Categorie Soggetti
Aerospace Engineering & Tecnology
ISSN journal
0342068X
Volume
19
Issue
6
Year of publication
1995
Pages
397 - 406
Database
ISI
SICI code
0342-068X(1995)19:6<397:MAAOBI>2.0.ZU;2-A
Abstract
Paper presents results from a numerical study of Indices blade-vortex interaction (BVI) aerodynamics and acoustics. A two-dimensional model problem was used to do the flow simulation using an Euler- and a Navie r-Stokes code. For the turbulent calculations an algebraic Baldwin-Lom ax and the two-equation k-epsilon turbulence model was used. The acous tic features of BVI in the near- and midfield were analysed with the f low simulation code and the far-field results were obtained using the three-dimensional Kirchhoff's method. Several crucial parameters of BV I, such as vortex strength, vortex miss distance and the free stream M ach number were varied. The main difference between the inviscid and t he viscous flow consideration are pointed out. A comparison with exper imental data is done for the important case of a head-on collision.