Analysis of Dynamic Stall Using Unsteady Boundary-layer Theory PDF Download
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Author: Roy Mac Scruggs
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 72
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Author: Roy Mac Scruggs
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 72
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Book Description
Author: R. M. Scruggs
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 74
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Kirti N. Ghia
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 88
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Book Description
The major objective of the AASERT Grant was to improve the analysis tools as well as assure the level of accuracy and efficiency that can be realized in the study of physics of the dynamic stall and related unsteady phenomena, through the development of the LES/DNS methodology. One M.S. and three Ph. D students were supported partially on this grant. The work carried out consisted of study of external unsteady flow using vorticity stream function formulation, analysis of boundary layer receptivity and transition using DNS methodology with spectral technique and, finally, compressibility effects in maneuvering body flows. Significant accomplishment is made in Object Oriented Numerics and high performance computing.
Author: W. J. McCroskey
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Stall and its consequences are fundamentally important to the design and operation of flight vehicles. A certain degree of unsteadiness always accompanies the flow over an airfoil or other streamlined body at high angle of attack, but the stall of a lifting surface undergoing unsteady motion is even more complex than static stall. Dynamic stall remains a major unsolved problem with a variety of current applications in aeronautics, hydrodynamics, and wind engineering. This report summarizes the main physical features of the phenomenon and the attempts that have been made to predict it. The information presented is drawn mainly from recent review articles and investigations by the author and his colleagues. Since a large fraction of the existing knowledge has come from experimental research, the details of dynamic stall are discussed principally in physical terms.
Author: W. Geissler
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Experimental investigations have exposed a strong dependency of unsteady separation characteristics in the regime of dynamic stall on airfoil shape, Reynolds and Mach number, frequency and time-dependent incidence. A suitable prediction method should therefore be able to account for these various parameters. Coupling procedures between two-dimensional unsteady boundary layers and inviscid surface singularly methods (panel methods) have been developed for analytical investigation of unsteady turbulent separation. In the present study, the influence of various parameters on unsteady separation is discussed in detail and comparison with experimental data is made. The results show that, even for weak coupling between boundary layer and inviscid boundary conditions, good correspondence exists between theory and experiment with respect to the development of unsteady separation.
Author: Richard B. Noll
Publisher:
ISBN:
Category : Wind power
Languages : en
Pages : 300
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Author: Wolfgang Geißler
Publisher:
ISBN:
Category :
Languages : en
Pages : 180
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Author: James C. Wu
Publisher:
ISBN:
Category : Lifting bodies (Aeronautics)
Languages : en
Pages : 84
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