NDLI: Drag measurements on a laminar flow body of revolution in langley's 13 inch magnetic suspension and balance system. m.s. thesis

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Drag measurements on a laminar flow body of revolution in langley's 13 inch magnetic suspension and balance system. m.s. thesis

Content Provider	NASA Technical Reports Server (NTRS)
Author	Dress, David A.
Copyright Year	1988
Description	Low-speed wind tunnel drag force measurements were taken on a laminar flow body of revolution free of support interference. This body was tested at zero incidence in the NASA Langley 13 inch Magnetic Suspension and Balance System (MSBS). The primary objective of these tests was to substantiate the drag force measuring capabilities of the 13 inch MSBS. A secondary objective was to obtain support interference free drag measurements on an axisymmetric body of interest. Both objectives were met. The drag force calibrations and wind-on repeatability data provide a means of assessing the drag force measuring capabilities of the 13 inch MSBS. The measured drag coefficients for this body are of interest to researchers actively involved in designing minimum drag fuselage shapes. Additional investigations included: the effects of fixing transition; the effects of fins installed in the tail; surface flow visualizations using both liquid crystals and oil flow; and base pressure measurements using a one-channel telemetry system. Two drag prediction codes were used to assess their usefulness in estimating overall body drag. These theoretical results did not compare well with the measured values because of the following: incorrect or non-existent modeling of a laminar separation bubble on the body and incorrect of non-existent estimates of base pressure drag.
File Size	4464302
Page Count	95
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19880016048
Archival Resource Key	ark:/13960/t5bc8vs55
Language	English
Publisher Date	1988-04-01
Access Restriction	Open
Subject Keyword	Aerodynamics Drag Laminar Flow Rotating Bodies Wind Tunnel Tests Flow Visualization Pressure Measurement Loads Forces Magnetic Suspension Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Thesis

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