NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Influences of Models on the Unsteady Pressure Characteristics of the NASA National Transonic FacilityPressure fluctuations have been measured over the course of several tests in the National Transonic Facility to study unsteady phenomenon both with and without the influence of a model. Broadband spectral analysis will be used to characterize the length scales of the tunnel. Special attention will be given to the large-scale, low frequency data that influences the Mach number and force and moment variability. This paper will also discuss the significance of the vorticity and sound fields that can be related to the Common Research Model and will also highlight the comparisons to an empty tunnel configuration. The effectiveness of vortex generators placed at the interface of the test section and wind tunnel diffuser showed promise in reducing the empty tunnel unsteadiness, however, the vortex generators were ineffective in the presence of a model.
Document ID
20150006847
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Jones, Gregory (NASA Langley Research Center Hampton, VA, United States)
Balakrishna, Sundareswara (Vigyan Research Associates, Inc. Hampton, VA, United States)
DeMoss, Joshua (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Goodliff, Scott (Jacobs Technology, Inc. Hampton, VA, United States)
Bailey, Matthew (Jacobs Technology, Inc. Hampton, VA, United States)
Date Acquired
April 28, 2015
Publication Date
January 5, 2015
Subject Category
Aerodynamics
Report/Patent Number
NF1676L-19093
Meeting Information
Meeting: AIAA SciTech 2015
Location: Kissimmee, FL
Country: United States
Start Date: January 5, 2015
End Date: January 9, 2015
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 478076.07.02
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available