A helicopter is subjected to a wide variety of flight conditions with disparate objectives; these
include efficient cruise and hover, and high-performance maneuvering. The hover condition …

This paper reviews the state of the art in helicopter rotor loads prediction with the emergence
of computational fluid dynamics (CFD) and computational structural dynamics (CSD) …

This paper presents an overview of the complex unsteady vortical flows that comprise the
wakes of rotary-wing aircraft, of the effects these tangled vortical structures have on the …

This paper gives an overview of CFD techniques developed and used at ONERA for
rotorcraft applications. First, the complex multidisciplinary environment around helicopters …

This paper discusses existing techniques for modeling the rotor wake in hover and in
forward flight. It also briefly review extensions of these methods for modeling complete …

A new far‐field approximation to the Ffowcs Williams—Hawkings quadrupole source, which
is valid for an in‐plane observer and utilizes preintegration in the direction normal to the …

WITH the increased performance of workstations and super-computers, three-dimensional
Navier-Stokes solvers are being used by industry today for a myriad of applications. Navier …

THE flowfield around a rotor, whether in forward flight or hover, is difficult to model due to the
presence of strong vorticity. The flow phenomena for a rotor differ from that for a wing in …

This paper summarizes a method that solves both the three dimensional thin-layer Navier-
Stokes equations and the Euler equations using overset structured and solution adaptive …

A helicopter is subjected to a wide variety of flight conditions with disparate objectives; these
include efficient cruise and hover, and high-performance maneuvering. Next generation …