NDLI: A computationally efficient modelling of laminar separation bubbles

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A computationally efficient modelling of laminar separation bubbles

Content Provider	NASA Technical Reports Server (NTRS)
Author	Maughmer, Mark D. Dini, Paolo
Copyright Year	1989
Description	In order to predict the aerodynamic characteristics of airfoils operating at low Reynolds numbers, it is necessary to accurately account for the effects of laminar (transitional) separation bubbles. Generally, the greatest difficulty comes about when attempting to determine the increase in profile drag that results from the presence of separation bubbles. While a number of empirically based separation bubble models have been introduced in the past, the majority assume that the bubble development is fully predictable from upstream conditions. One way of accounting for laminar separation bubbles in airfoil design is the bubble analog used in the design and analysis program of Eppler and Somers. A locally interactive separation bubble model was developed and incorporated into the Eppler and Somers program. Although unable to account for strong interactions such as the large reduction in suction peak sometimes caused by leading edge bubbles, it is able to predict the increase in drag and the local alteration of the airfoil pressure distribution that is caused by bubbles occurring in the operational range which is of most interest.
File Size	784530
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900003556
Archival Resource Key	ark:/13960/t1kh5gr8x
Language	English
Publisher Date	1989-01-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Boundary Layer Separation Aerodynamic Drag Bubbles Laminar Boundary Layer Airfoil Profiles Computational Fluid Dynamics Laminar Flow Turbulent Boundary Layer Pressure Distribution Momentum Boundary Layer Transition Mathematical Models Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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