RANS Simulation of Turbulent Flow near Helicopter Fuselage Using Body-Fitted Approach

Studying turbulent flow near a helicopter fuselage through RANS simulations with a focus on the ROBIN concept, mathematical modeling, meshing techniques, convergence results, and comparison with experimental data. Results include fields visualization and insights into rotor-fuselage interactions.

• Turbulent flow
• RANS simulation
• Helicopter fuselage
• Meshing techniques
• Experimental comparison

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1. The RANS simulation of turbulent flow near The RANS simulation of turbulent flow near helicopter fuselage using the body helicopter fuselage using the body- -fitted approach approach fitted Vladimir G. Bobkov Vladislav V. Vershkov NORMA Progress Meeting, April 20th, 2021

2. Problem formulation ROBIN (ROtor Body INteractions) fuselage Length = 3.15 m = = 0 V = 40 m/s Re = 4 106 V 2 NORMA Progress Meeting, April 20th, 2021

3. Mathematical model & Meshing RANS with SA turbulent model Implicit scheme (2ndtime order) WENO 5 Boundary conditions: Input/ Output No-slip wall Symmetry Physical computation time: 4 s Domain size: 629.6 X 157.4 X 314.8 m Nodes number 1.6 M per of computation domain Minimal tetrahedron height: 1.73 10-6 3 NORMA Progress Meeting, April 20th, 2021

4. Results. Convergence 4 NORMA Progress Meeting, April 20th, 2021

5. Results. Comparing with experiment X[N] Z[N] Current Computation 12.81 217.8 Current Computation Fixed EBR 12.36 218.9 Current Computation SST 12.61 219.1 *EXPERIMENTAL AND THEORETICAL STUDIES OF HELICOPTER ROTOR-FUSELAGE INTERACTION N. Bettschart, A. Desopper, R. Hanotel and R. Larguier ICAS-92-4.8.1 5 NORMA Progress Meeting, April 20th, 2021

6. Results. Fields visualization 6 NORMA Progress Meeting, April 20th, 2021

7. Thanks you for the attention 7 NORMA Progress Meeting, April 20th, 2021