NDLI: Active control of instabilities in laminar boundary-layer flow. part 1: an overview

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Active control of instabilities in laminar boundary-layer flow. part 1: an overview

Content Provider	NASA Technical Reports Server (NTRS)
Author	Erlebacher, Gordon Joslin, Ronald D. Hussaini, M. Yousuff
Copyright Year	1994
Description	This paper (the first in a series) focuses on using active-control methods to maintain laminar flow in a region of the flow in which the natural instabilities, if left unattended, lead to turbulent flow. The authors review previous studies that examine wave cancellation (currently the most prominent method) and solve the unsteady, nonlinear Navier-Stokes equations to evaluate this method of controlling instabilities. It is definitely shown that instabilities are controlled by the linear summation of waves (i.e., wave cancellation). Although a mathematically complete method for controlling arbitrary instabilities has been developed (but not yet tested), the review, duplication, and physical explanation of previous studies are important steps for providing an independent verification of those studies, for establishing a framework for subsequent work which will involve automated transition control, and for detailing the phenomena by which the automated studies can be used to expand knowledge of flow control.
File Size	1120793
Page Count	17
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950012543
Archival Resource Key	ark:/13960/t2q57j06r
Language	English
Publisher Date	1994-12-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Navier-stokes Equation Laminar Boundary Layer Wave Attenuation Laminar Flow Tollmien-schlichting Waves Boundary Layer Transition Boundary Layer Stability Active Control Boundary Layer Control Boundary Layer Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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