NDLI: Incompressible boundary-layer stability analysis of lfc experimental data for sub-critical mach numbers. m.s. thesis

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Incompressible boundary-layer stability analysis of lfc experimental data for sub-critical mach numbers. m.s. thesis

Content Provider	NASA Technical Reports Server (NTRS)
Author	Berry, S. A.
Copyright Year	1986
Description	An incompressible boundary-layer stability analysis of Laminar Flow Control (LFC) experimental data was completed and the results are presented. This analysis was undertaken for three reasons: to study laminar boundary-layer stability on a modern swept LFC airfoil; to calculate incompressible design limits of linear stability theory as applied to a modern airfoil at high subsonic speeds; and to verify the use of linear stability theory as a design tool. The experimental data were taken from the slotted LFC experiment recently completed in the NASA Langley 8-Foot Transonic Pressure Tunnel. Linear stability theory was applied and the results were compared with transition data to arrive at correlated n-factors. Results of the analysis showed that for the configuration and cases studied, Tollmien-Schlichting (TS) amplification was the dominating disturbance influencing transition. For these cases, incompressible linear stability theory correlated with an n-factor for TS waves of approximately 10 at transition. The n-factor method correlated rather consistently to this value despite a number of non-ideal conditions which indicates the method is useful as a design tool for advanced laminar flow airfoils.
File Size	15797715
Page Count	84
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19860017742
Archival Resource Key	ark:/13960/t4bp4zp4w
Language	English
Publisher Date	1986-07-01
Access Restriction	Open
Subject Keyword	Aerodynamics Slotted Wind Tunnels Laminar Flow Laminar Flow Airfoils Transonic Wind Tunnels Wind Tunnel Tests Tollmien-schlichting Waves Incompressible Boundary Layer Boundary Layer Stability Boundary Layer Control 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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