Simulation of Helicopter Rotors On Unstructured Mixed Meshes Using Edge-Based Reconstruction Schemes

Abstract

The paper gives a detailed description of the developed numerical method for simulating the turbulent flow around a helicopter rotor and calculating its aerodynamic characteristics. The method is based on the original vertex-centered finite-volume EBR schemes. The features of these schemes are their higher accuracy that is achieved through the use of edge-based reconstruction of variables on extended quasi-one-dimensional stencils, and a moderate computational cost that allows for serial computations. When dealing with discontinuities or solutions with large gradients, a quasi-one-dimensional EBR-WENO scheme is used. The methods are implemented in the in-house code NOISEtte within the hybrid MPI-OpenMP parallel model. Validation of the developed techniques is carried out by simulating several cases for hovering and forward-flight regimes of helicopter rotors.

Numerical Study of Fuselage Impact on Acoustic Characteristics of a Helicopter Rotor

“…The aerodynamic characteristics of Caradonna-Tung rotor in hover simulated in the RFR were predicted in our previous work [13]. The results showed a good agreement with the experimental data for pressure coefficient distribution and the tip vortex trajectory.…”

“…The hovering helicopter flight is modelled by the Caradonna-Tung rotor [10] and ROBIN fuselage [11,12], scaled to be compatible with the rotor radius. The choice of the helicopter model is motivated by the availability of detailed geometrical descriptions, experimental results, and prior experience simulating these separate cases [13].…”

Technology for Supercomputer Simulation of Turbulent Flows in the Good New Days of Exascale Computing

“…In our simulations, meshes of up to 400 million nodes have been used so far. More information, including validation and comparison of RANS and DES results, can be found in [3,4]. Currently available supercomputer resources allow modeling only separate fragments of aircrafts.…”