Unsteady aerodynamic characteristics of a blade in pitching oscillation with flow separation (1st report, The case with laminar separation bubble)
نویسندگان
چکیده
منابع مشابه
DNS of a Laminar Separation Bubble
Direct numerical simulation (DNS) is used to study the evolution of a boundary layer that was laminar initially followed by separation and then reattachment owing to generation of turbulence. This creates a closed region of recirculation, known as the laminar-separation bubble. The present simulation emulates the flow environment encountered in a modern LP turbine blade, where a laminar separat...
متن کاملActive Control of a Laminar Separation Bubble
In the present paper an active control mechanism for the control of laminar separation bubbles on airfoils is investigated by means of direct numerical simulation and linear stability theory. Boundary layer instabilities excited by periodic oscillations are utilized to control the size and length of the separation bubble and to make it finally disappear when desired. Unlike traditional vortex g...
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چکیده ندارد.
15 صفحه اولNumerical Simulation of Laminar Separation-Bubble Control
In the present paper an active control mechanism for the control of laminar separation bubbles on airfoils is investigated by means of direct numerical simulation and linear stability theory. Boundary layer instabilities excited by periodic oscillations are utilized to control the size and length of the separation bubble and to make it finally disappear when desired. Unlike traditional vortex g...
متن کاملNumerical solution of unsteady flow on airfoils with vibrating local flexible membrane
Unsteady flow separation on the airfoils with local flexible membrane (LFM) has been investigated in transient and laminar flows by the finite volume element method. A unique feature of the present method compared with the common computational fluid dynamic softwares, especially ANSYS CFX, is the modification using the physical influence scheme in convection fluxes at cell surfaces. In contr...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
سال: 1984
ISSN: 0387-5016,1884-8346
DOI: 10.1299/kikaib.50.460_2862