Unsteady wall pressure characteristics of a 90 degree elbow in high Reynolds numbers
نویسندگان
چکیده
منابع مشابه
Unsteady Aerodynamic Performance of Model Wings at Low Reynolds Numbers
The synthesis of a comprehensive theory of force production in insect flight is hindered in part by the lack of precise knowledge of unsteady forces produced by wings. Data are especially sparse in the intermediate Reynolds number regime (10<Re<1000) appropriate for the flight of small insects. This paper attempts to fill this deficit by quantifying the time-dependence of aerodynamic forces for...
متن کاملUnsteady aerodynamic models for agile flight at low Reynolds numbers
The goal of this work is to develop low-order models for the unsteady aerodynamic forces on a small wing in response to agile maneuvers and gusts. In a previous study, it was shown that Theodorsen’s and Wagner’s unsteady aerodynamic models agree with force data from DNS for pitching and plunging maneuvers of a 2D flat plate at Reynolds numbers between 100 and 300 as long as the reduced frequenc...
متن کاملHigh–Reynolds Number Wall Turbulence
We review wall-bounded turbulent flows, particularly high–Reynolds number, zero–pressure gradient boundary layers, and fully developed pipe and channel flows. It is apparent that the approach to an asymptotically high– Reynolds number state is slow, but at a sufficiently high Reynolds number the log law remains a fundamental part of the mean flow description. With regard to the coherent motions...
متن کاملA pseudo-penalization method for high Reynolds number unsteady flows
A pseudo-penalization method, i.e., an implicit formulation of the standard volume penalization method, is introduced and validated by considering the 2D wake of a cylinder at Reynolds number Re = 200. © 2007 IMACS. Published by Elsevier B.V. All rights reserved. MSC: 76D05; 76D25; 76M22
متن کاملDecay of turbulence at high reynolds numbers.
Turbulent motions in a fluid decay at a certain rate once stirring has stopped. The role of the most basic parameter in fluid mechanics, the Reynolds number, in setting the decay rate is not generally known. This Letter concerns the high-Reynolds-number limit of the process. In a classical grid-turbulence wind-tunnel experiment that both reaches higher Reynolds numbers than ever before and cove...
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 Science and Technology
سال: 2014
ISSN: 1880-5558
DOI: 10.1299/jfst.2014jfst0055