Theoretical prediction and design for vortex generators in turbulent boundary layers
نویسندگان
چکیده
منابع مشابه
Vortex Dynamics in Transitional and Turbulent Boundary Layers
The dynamics of transitional and turbulent boundary layers is explored via a hybrid vortex filament/finite volume simulation scheme in which vortical structures are identified without the constraints imposed by the traditional assumption that they are synonymous with rotational regions. Vortex furrows consisting of elongated, streamwise-oriented, raised perturbations to the wall vorticity layer...
متن کاملCharacteristics of vortex packets in turbulent boundary layers
BHARATHRAM GANAPATHISUBRAMANI, ELLEN K. LONGMIRE and IVAN MARUSIC Journal of Fluid Mechanics / Volume 478 / March 2003, pp 35 46 DOI: 10.1017/S0022112002003270, Published online: 17 March 2003 Link to this article: http://journals.cambridge.org/abstract_S0022112002003270 How to cite this article: BHARATHRAM GANAPATHISUBRAMANI, ELLEN K. LONGMIRE and IVAN MARUSIC (2003). Characteristics of vort...
متن کاملTransitional-turbulent spots and turbulent-turbulent spots in boundary layers.
Two observations drawn from a thoroughly validated direct numerical simulation of the canonical spatially developing, zero-pressure gradient, smooth, flat-plate boundary layer are presented here. The first is that, for bypass transition in the narrow sense defined herein, we found that the transitional-turbulent spot inception mechanism is analogous to the secondary instability of boundary-laye...
متن کاملInstabilities in turbulent boundary layers
An investigation of a model of turbulence generation in the wall region of a turbulent boundary layer is made through direct numerical simulations. The model is based on the instability of a streak. First, a laminar boundary layer disturbed by a continuous blowing through a slot is simulated in order to reproduce and further investigate the results reported from the experiments of Acarlar & Smi...
متن کاملControl of turbulent boundary layers
The objective of this paper is to give an overview of recent progress on boundary layer control made by the author’s research group at University of California, Los Angeles. A primary theme is to highlight the importance of a certain linear mechanism and its contribution to skin-friction drag in turbulent boundary layers—and the implication that significant drag reduction can be achieved by alt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 1994
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112094004210