An LDV investigation of support structure influence on the flow field near the wingtip of a STOVL configuration in hover
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Authors
Enochs, Edgar R.
Subjects
NA
Advisors
Hebbar, S. K.
Platzer, Max F.
Date of Issue
1994-09
Date
September 1994
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Acquisition phase zero (Concept Exploration) of the Advanced Short Takeoff/ Vertical Land (ASTOVL) aircraft development includes, among other tests, evaluation of forces and moments on a large-scale powered model (LSPM) suspended in the Outdoor Aerodynamic Research Facility (OARF) at the NASA Ames Research Center. ThisinvestigationassessedtheinfluenceoftheOARFsupportstructureupontheflowfieldthrough LDV measurements in the vicinity of the struts and the wingtip of a generic flat-plate model mounted in the sub- scaleNPSground-effectstestrig. Themodelwasatwinsubcriticaljetconfigurationwiththenozzlesarranged intandem. ThetestenvironmentwassaturationseededusingasmokegeneratorandLDVmeasurementswere made in the entrained flow. Non-coincident measurements were made to determine the three component mean velocities at points in the region of interest and the component mean and composite mean velocities compared for configurationswithstrutspresentandstrutsremoved. Variationswerediscernibleinthecomponentmean velocities between samples both in the same strut configuration and between the struts-installed and struts- removed configurations, but were generally small enough to be considered negligible.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
127 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.