Open Access
Computation of UH-60A Airloads Using CFD/CSD Coupling on Unstructured Meshes
Reads0
Chats0
TLDR
An unsteady Reynolds-averaged Navier-Stokes solver for unstructured grids is used to compute the rotor airloads on the UH-60A helicopter at high-speed and high thrust conditions.Abstract:
An unsteady Reynolds-averaged Navier-Stokes solver for unstructured grids is used to compute the rotor airloads on the UH-60A helicopter at high-speed and high thrust conditions. The flow solver is coupled to a rotorcraft comprehensive code in order to account for trim and aeroelastic deflections. Simulations are performed both with and without the fuselage, and the effects of grid resolution, temporal resolution and turbulence model are examined. Computed airloads are compared to flight data.read more
Citations
More filters
Journal ArticleDOI
Discrete Adjoint-Based Design for Unsteady Turbulent Flows on Dynamic Overset Unstructured Grids
Eric J. Nielsen,Boris Diskin +1 more
TL;DR: The approach provides a general framework for performing highly efficient and discretely consistent sensitivity analysis for problems involving arbitrary combinations of overset unstructured grids that may be static, undergoing rigid or deforming motions, or any combination thereof.
Journal ArticleDOI
Numerical investigation of three-dimensional effects during dynamic stall
TL;DR: In this paper, the numerical simulation of dynamic stall around a 3D finite-span oscillating wing of constant OA209 airfoil section is compared to experimental results obtained in the ONERA F2 wind-tunnel, assuming fully turbulent flow.
Journal ArticleDOI
Rotorcraft simulations: a challenge for CFD
TL;DR: An overview of CFD techniques developed and used at ONERA for rotorcraft applications is given in this paper, where an overview of the approaches taken by the comprehensive code and the CFD solvers are outlined.
Journal ArticleDOI
Rotor Structural Loads Analysis Using Coupled Computational Fluid Dynamics/Computational Structural Dynamics
Hyeonsoo Yeo,Mark Potsdam +1 more
TL;DR: Coupled computational fluid dynamics/computational structural dynamics analyses are performed, and the calculated rotor structural loads are compared with the flight-test data obtained from the NASA/Army UH-60A Airloads Program.
Journal ArticleDOI
Modelling the aeroelastic response and flight dynamics of a hingeless rotor helicopter including the effects of rotor-fuselage aerodynamic interaction
TL;DR: In this paper, a mathematical approach for the simulation of rotor-fuselage aerodynamic interaction in helicopter aeroelasticity and flight dynamics applications is presented, where a matrix/vector-based formulation is developed for the treatment of elastic blade kinematics in the time-domain.
References
More filters
Journal ArticleDOI
Two-equation eddy-viscosity turbulence models for engineering applications
TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
Proceedings ArticleDOI
A one-equation turbulence model for aerodynamic flows
Philippe R. Spalart,S. Allmaras +1 more
Journal ArticleDOI
Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes
TL;DR: In this article, it is shown that these features can be obtained by constructing a matrix with a certain property U, i.e., property U is a property of the solution of the Riemann problem.
Journal ArticleDOI
An implicit upwind algorithm for computing turbulent flows on unstructured grids
TL;DR: An implicit, Navier-Stokes solution algorithm is presented for the computation of turbulent flow on unstructured grids using an upwind algorithm and a backward-Euler time-stepping scheme.
Journal ArticleDOI
Three-dimensional unstructured viscous grids by the advancing-layers method
TL;DR: A method is presented for generating three-dimensional viscous unstructured grids on complex configurations using a natural extension of the advancing-layers method, which benefits from a high degree of flexibility and automation required for generating grids around complex geometries.