Accession Number : ADA117425
Title : Holographic Interferometry Technique for Rotary Wing Aerodynamics and Noise.
Descriptive Note : Conference paper,
Corporate Author : NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
Personal Author(s) : Kittleson,John K ; Yu,Yung H
PDF Url : ADA117425
Report Date : 18 Jun 1982
Pagination or Media Count : 14
Abstract : In this paper, the concepts of holography and holographic interferometry, as applied to the visualization and measurement of the three-dimensional flow field near a rotor tip, are previewed, and initial experimental results of investigations of local shock structures and tip vortices behind the blade are presented. An additional method to visualize the flow in a three-dimensional manner is demonstrated, and finally, a method to quantitatively measure the three-dimensional flow, which will provide the necessary information to help improve helicopter performance and reduce noise, is introduced.
Descriptors : *Vortices, *Rotor blades(Rotary wings), *Aircraft noise, *Measuring instruments, Holography, Interferometry, Flow visualization, Transonic flow, Three dimensional flow, Shock waves, Acoustics, Velocity, Helicopters, Aerodynamics, Rotary wing aircraft
Subject Categories : Helicopters
Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE