Accession Number:

ADA440555

Title:

Large-Eddy Simulation of the Tip-Flow of a Rotor in Hover

Descriptive Note:

Final progress rept.1 Aug 2001-31 Jul 2005

Corporate Author:

GEORGE WASHINGTON UNIV WASHINGTON DC

Personal Author(s):

Report Date:

2005-10-28

Pagination or Media Count:

11.0

Abstract:

The blade-tip vortex is one of the most important aerodynamic feature of a helicopter rotor wake, The strength, size, location and orientation of the tip vortices affect the blade loads and rotor performance. The overall goal of the current project was to develop a large-eddy simulation LES capability to simulate the rotor-tip vortex and use these simulations to perform a detailed analysis of the dynamics of this flow, The specific objectives of this research project are 1 Develop a LES based computational approach for simulating the tip flow of a rotor in hover. 2 Validate the computational approach against PIV measurements of a hovering rotor 3 Use the solver to gain insight into the formation, structure and downstream evolution of the tip-vortex and the dynamics of the turbulence associated with the tip vortex.

Descriptors:

Subject Categories:

  • Aerodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE