Journal ArticleDOI
Laminar Separation, Transition, and Turbulent Reattachment near the Leading Edge of Airfoils
A. V. Arena,Thomas J. Mueller +1 more
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In this paper, the laminar separation, transition, and turbulent reattachment near the leading edge of a cylindrical noseconstant thickness airfoil model were investigated using a low-turbulence, low-speed smoke wind tunnel.Abstract:
The laminar separation, transition, and turbulent reattachment near the leading edge of a cylindrical noseconstant thickness airfoil model were investigated using a low-turbulence, low-speed smoke wind tunnel. The locations of separation, transition, and reattachment were obtained from smoke flow photographs and surface oil flow techniques for chord Reynolds numbers from about 150,000 to 470,000. These visual data combined with static pressure distributions delineate the effects of angle of attack, flap deflection angle, and chord Reynolds number on the separation bubble characteristics. The data concerning the length of the laminar and turbulent portions of the bubble agree with the empirical prediction methods for short bubbles.read more
Citations
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Journal ArticleDOI
Laminar boundary layer separation: Instability and associated phenomena
TL;DR: In this paper, a review of studies of laminar separated flows is presented, where the authors show that a mean flow pattern in a separated flow as well as its unsteady properties depend primarily on the instability and other "transitional" phenomena associated with a laminars separation.
Journal ArticleDOI
Experimental Studies of Separation on a Two-Dimensional Airfoil at Low Reynolds Numbers
TL;DR: In this paper, the laminar separation, transition, and turbulent reattachment near the leading edge of a two-dimensional NACA 663 -018 airfoil were investigated using a low-speed, smoke visualization wind tunnel.
Proceedings ArticleDOI
Comparison of Laminar Separation Bubble Measurements on a Low Reynolds Number Airfoil in Three Facilities
TL;DR: In this paper, a series of experiments on the SD7003 airfoil, conducted in three different facilities: a low-turbulence wind tunnel, a water tunnel, and a tow tank, are described.
Journal ArticleDOI
Vortex shedding and shear-layer instability of wing at low-Reynolds numbers
Rong Fung Huang,Chih L. Lin +1 more
TL;DR: In this article, smoke-wire and surface oil-flow techniques are employed to visualize the flow patterns and evolution of vortex shedding and shear-layer instability of a NACA 0012 cantilever wing.
Journal ArticleDOI
The ultra-low Reynolds number airfoil wake
TL;DR: In this article, the authors measured the lift force and the near wake of an NACA 0012 airfoil over the angle (α) of attack of 0°-90° and the chord Reynolds number (Re petertodd c� ), 5.3×−103 −5.1×−104.
References
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Dissertation
Laminar separation bubbles in two and three dimensional incompressible flow
TL;DR: In this article, a semi-empirical theory for the prediction of the growth and bursting of two-dimensional short bubbles is developed, with particular emphasis upon the conditions governing re-attachment.
Journal ArticleDOI
Collapse of Long Cylindrical Shells under Combined Bending and Pressure Loads
TL;DR: In this article, the nonlinear collapse behavior of long cylindrical shell structures subject to a bending load only or combined bending and uniform normal pressure loads is studied using the STAGS computer code.
Journal ArticleDOI
Effects of Leading-Edge Separation on Thin Wings in Two-Dimensional Incompressible Flow
Journal ArticleDOI
The Behaviour and Effects of Laminar Separation Bubbles on Aerofoils in Incompressible Flow
TL;DR: A survey of information on laminar separation bubbles and their effect on the stalling characteristics of aerofoils is presented in this paper, where it is shown that there are two principal kinds of bubbles and that their existence can be predicted.