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Author:Yondo Mine, Guy Raoul
Title:Numerical Simulation of Helicopter Rotor Blades in Hover
Publication type:Master's thesis
Publication year:2010
Pages:96 s. + liitt.11      Language:   eng
Department/School:Sovelletun mekaniikan laitos
Main subject:Lentotekniikka   (Kul-34)
Supervisor:Siikonen, Timo
Instructor:Ala-Juusela, Juhaveikko
OEVS:
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Location:P1 Ark Aalto  4249   | Archive
Keywords:helicopter
hovering rotor
transonic
Chimera
FINFLO
GRIDGEN
Abstract (eng): Reynolds-averaged thin-layer compressible Navier-Stokes steady simulations are presented for the Caradonna & Tung helicopter model rotor in hover, using the finite-volume based flow solver FINFLO.
Computations are performed for the kappa - epsilon and the kappa - omega SST turbulence models.
Two Chimera and non-Chimera hover approaches are implemented.
Fairly good correlation between the computed pressure coefficients and the experimental performances is achieved for a blade collective pitch angle of 8° along five locations on the blade span.
The results indicate little grid sensitivity for both turbulence models and uniformly well predicted the capture of the tip vortices.

In addition, the friction coefficients compared well to each other in the three gridding approaches, considering the blades are assumed to be rigid bodies.
Despite the results obtained, the numerical simulations could be improved with further analysis and developments.
These improvements should be concerned with the use of more sophisticated turbulence models and higher order schemes, the availability of high performance computers because of the important computing time.
In addition, the investigations should account for the blade deformations.
ED:2011-06-07
INSSI record number: 42128
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