Development of a Large Field-of-View PIV System for Rotorcraft Testing in the 14- x 22-Foot Subsonic TunnelA Large Field-of-View Particle Image Velocimetry (LFPIV) system has been developed for rotor wake diagnostics in the 14-by 22-Foot Subsonic Tunnel. The system has been used to measure three components of velocity in a plane as large as 1.524 meters by 0.914 meters in both forward flight and hover tests. Overall, the system performance has exceeded design expectations in terms of accuracy and efficiency. Measurements synchronized with the rotor position during forward flight and hover tests have shown that the system is able to capture the complex interaction of the body and rotor wakes as well as basic details of the blade tip vortex at several wake ages. Measurements obtained with traditional techniques such as multi-hole pressure probes, Laser Doppler Velocimetry (LDV), and 2D Particle Image Velocimetry (PIV) show good agreement with LFPIV measurements.
Document ID
20090022378
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Jenkins, Luther N. (NASA Langley Research Center Hampton, VA, United States)
Yao, Chung-Sheng (NASA Langley Research Center Hampton, VA, United States)
Bartram, Scott M. (NASA Langley Research Center Hampton, VA, United States)
Harris, Jerome (NASA Langley Research Center Hampton, VA, United States)
Allan, Brian (NASA Langley Research Center Hampton, VA, United States)
Wong, Oliver (Army Aviation Systems Command Moffett Field, CA, United States)
Mace, W. Derry (Sierra Lobo, Inc. Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
May 27, 2009
Subject Category
Aerodynamics
Report/Patent Number
LF99-7824
Meeting Information
Meeting: AHS International 65th Forum and Technology Display