Numerical Analysis of HVAB and STAR Rotor Blades Using HMB3

Abstract

Computational Fluid Dynamics simulations of the Hover Validation and Acoustic Baseline, Smart Twisting Active Rotor, and Active Twist Rotor blades in hover are presented. For these blades, the effect of twist in hover is examined, using the in-house simulation tools of Glasgow University. Rigid and aeroelastic methods are also compared for these rotors. In forward flight, high-twist may be associated with increased blade vibration. For the Smart Twisting Active Rotor blades, the effect of static twist and of a 2/rev harmonic active twist input are also investigated at a high advance forward ratio flight conditions. A vibration index is used to quantify the harmonic components of hub forces and moments. The hover simulations were computed on grids of 10-16m cells, coupled with structural updates. The results show the strong effect of blade twist on hover performance. The forward flight cases were computed on a 36m cell grid and using a modal aeroelastic method.

Acoustic and Aerodynamic Evaluation of Dlr Small-Scale Rotor Configurations Within Garteur AG26

“…Helicopter Multi-Block (HMB3) code is employed in this study. The solver can accurately predict the aerodynamic performance, acoustics of propagation, and has been widely used in the investigation of rotorcraft flows [41], helicopter rotor aeroelasticity [42], and missile trajectory prediction [43]. Moreover, a good agreement when compared to experimental results in aerodynamics, acoustics and aeroelasticity of propellers, can be seen in a previous study [44].…”

A Novel Composite Helicopter Tail Rotor Blade with Enhanced Mechanical Properties

“…Other studies on composite helicopter blades have focused on the analysis of cracks initiated in the areas near the interface between the foam core and the adhesive [23]; the study of the deformation of a rotor blade made of polymer composite materials with active geometry control using embedded piezoelectric actuators [24]; the investigation of possible defects in the composite structure of helicopter rotor blades using combined neutron and X-ray radiography [25]; numerical analyses to simulate the response of composite rotor blades under high-velocity impact loads due to bird strikes [26,27]; the optimum structural design of composite helicopter blades using a genetic-algorithm-based optimizer [28]; computational fluid dynamics simulations of the Hover Validation and Acoustic Baseline, Smart Twisting Active Rotor, and Active Twist Rotor blades in hover [29]; the free-vibration behaviour of multi-layer composite beams reinforced with graphene platelets resting on a viscoelastic foundation [30]; etc.…”