Accession Number : ADA293012

Title :   Application of Multigrid Computational Fluid Dynamics (CFD) Methods to Rotor Analysis.

Descriptive Note : Final rept. 1 Sep 93-31 Aug 94,

Corporate Author : HAMPTON UNIV VA

Personal Author(s) : Hu, Hong

PDF Url : ADA293012

Report Date : MAR 1995

Pagination or Media Count : 158

Abstract : The TLNS3DR code is applied to various advanced rotor blades to study tip vortex and to investigate the general capabilities of the code. For nonrotating flows, the solutions in terms of the tip vortex and surface pressure coefficients are obtained for realistic helicopter rotor-tip configurations to study effects of blade planforms on the tip vortex under incompressible flow condition. Calculated results are compared with experimentally obtained data at NASA-Langley's Basic Aerodynamic Research Wind Tunnel (BART). A Berp-type tip, a swept-type tip and its equivalent taper-type tip configurations are investigated. For both nonrotating and rotating flows, the Berp-type blade, the swept-type blade, and its equivalent taper-type and rectangle-type blades with zero twist are considered under compressible flow condition. Solutions are presented. (AN)

Descriptors :   *COMPUTATIONAL FLUID DYNAMICS, *ROTOR BLADES(ROTARY WINGS), VELOCITY, EXPERIMENTAL DATA, COMPARISON, VORTICES, HELICOPTER ROTORS, COMPRESSIBLE FLOW, FLOW FIELDS, HYDRODYNAMIC CODES, MACH NUMBER, NAVIER STOKES EQUATIONS, PRESSURE DISTRIBUTION, INCOMPRESSIBLE FLOW, DOWNWASH, RUNGE KUTTA METHOD, HOVERING, AXIAL FLOW, CROSS FLOW, THREE DIMENSIONAL FLOW, BLADE TIPS.

Subject Categories : Fluid Mechanics
      Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE