Advanced SearchSearch Tips
Predicting BVI Loadings and Wake Structure of the HARTII Rotor Using Adaptive Unstructured Meshes
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Predicting BVI Loadings and Wake Structure of the HARTII Rotor Using Adaptive Unstructured Meshes
Yu, Dong-Ok; Jung, Mun-Seung; Kwon, Oh-Joon; Yu, Yung-H.;
  PDF(new window)
The flow fields around the HARTII rotor were numerically investigated using a viscous flow solver on adaptive unstructured meshes. An overset mesh and a deforming mesh technique were used to handle the blade motion including blade deflection, which was obtain from the HARTII experimental data. A solution-adaptive mesh refinement technique was also used to capture the rotor wake effectively. Comparison of the sectional normal force and pitching moment at 87% radial station between the two cases, with and without the blade deflection, showed that the blade loading is significantly affected by blade torsion. It was found that as the mesh was refined, the strength of tip vortex is better preserved, and the magnitude of high frequency blade loading, caused by blade-vortex interaction (BVI), is further magnified. It was also found that a proper time step size, which corresponds to the cell size, should be used to predict unsteady solutions accurately. In general, the numerical results in terms of the unsteady blade loading and the rotor wake show good agreement with the experimental data.
CFD(Computational Fluid Dynamics);Unstructured Overset Mesh Technique;Deforming Mesh Technique;BVI(Blade-Vortex Interaction);Blade Deflection;
 Cited by
NACA0015익형을 가지는 로터 깃 끝와류의 후류유동구조,손용준;김정현;한용운;

한국항공우주학회지, 2011. vol.39. 3, pp.210-217 crossref(new window)
Wake Structure of Tip Vortex Generated by a Model Rotor Blade of NACA0015 Airfoil Section, Journal of the Korean Society for Aeronautical & Space Sciences, 2011, 39, 3, 210  crossref(new windwow)
A. J. Landgrebe, “An Analytical Method for Predictiong Rotor Wake Geometry”, Journal of the American Helicopter Society, Vol. 14, No. 4, 1969.

W. Johnson, “Wake Model for Helicopter Rotor in High-Speed- Flight”, NASA Contractor Report, No. 177507, 1988.

A. Datta, J. Sitaraman, I. Chopra, and J. D. Baeder, “CFD/CSD Prediction of Rotor Vibratory Loads in High-Speed Flight”, Journal of Aircraft, Vol. 43, No. 6, 2006.

J. W. Lim, T. A. Nygaard, R. Strawn, and M. Potsdam, “Blade -Vortex Interaction Airloads Prediction Using Coupled Computational Fluid Structural Dynamics”, Journal of the American Helicopter Society, Vol. 2, No. 4, 2007.

C. M. Yang and T. Aoyama, “Effect of Computation Parameters on BVI Noise Prediction Using HART II Motion data”, 34th European Rotorcraft Forum, 2008.

B. van der Wall, "2nd HHC Aeroacoustic Rotor Test (HART II) - Part I: Test Documentation-", DLR 1B 111-2003/21, Braunschweig, Germany, 2003.

B. van der Wall and C. Burley, “2nd HHC Aeroacoustic Rotor Test (HART II) – Part II: Representative Results – “, DLR 1B 111-2005/3, Braunschweig, Germany, 2005.

M. S. Jung, O. J. Kwon and H. J. Kang, “Assessment of Rotor Hover Performance Using a Node-Based Flow Solver”, KSAS International Journal, Vol. 8, No. 2, 2007.

H. J. Kang and O. J. Kwon, “Unstructured Mesh Navier-Stokes Calculations of the Flow Field of a Helicopter Rotor in Hover”, Journal of American Helicopter Society, Vol. 47, No. 2, 2002.

M. Kelly, K. Duraisamy, and R. Brown, “Predicting Blade Vortex Interaction, Airloads and Acoustics using the Vorticity Transport Model”, Proceedings of the American Helicopter Society 9th Aeromechanics Specialist Meeting, San Francisco, USA, 2008.

M. S. Jung and O. J. Kwon, “A Parallel Unstructured Hybrid Overset Mesh Technique for Unsteady Viscous Flow Simulations”, International conference on Parallel computational fluid dynamics, Antalya, Turkey, 2007.

J. T. Batina, “Unsteady Euler Algorithm with Unstructured Dynamic Mesh for Complex-Aircraft Aerodynamic Analysis”, AIAA Journal, Vol. 29, No. 3, 1991. crossref(new window)

C. L. Bottasso, D. Detomi, and R. Serra, “The Ball-vertex Method: A New Simple Spring Analogy Method for Unstructured Dynamic Meshes”, Computer Methods in Applied Mechanics and Engineering, Vol. 197, 2005. crossref(new window)

D. B. Kholodar, S. A. Morton and R. M. Cummings, “Deformation of Unstructured Viscous Grids”, AIAA paper, 2005-0926.