Results 231 to 240 of about 1,309 (281)
Some of the next articles are maybe not open access.
Entrainment Models for Laminar Jets, Plumes, and Wakes
Physics of Fluids, 1967Entrainment models are developed for laminar axisymmetric flow in viscous jets, plumes, and wakes, and an application is made to the ascent of laminar plumes in a stably stratified environment. The entrainment flux scale is obtained using order-of-magnitude arguments, and in each case is shown to be proportional to the kinematic viscosity ν with the ...
B R Morton
exaly +3 more sources
Wingtip vortices and exhaust jets during the jet regime of aircraft wakes
Aerospace Science and Technology, 1997Abstract By means of a vortex-filament technique and large-eddy simulations the dynamics during the jet regime of the wake of a subsonic aircraft cruising in a stably stratified and turbulent atmosphere is simulated. The imposed methods are briefly outlined. The major issues as the roll-up process of the vortex sheet around the wings into the wingtip
T Gerz
exaly +3 more sources
Aerodynamics of a jet in the vortex wake of a wing
AIAA Journal, 2001Results of a low-speed experimental investigation of jet behavior in the trailing vortex wake of a wing are presented. The effects of varying jet-to-freestream velocity ratio and vortex-wake strength on the downstream evolution of the flowfield are quantified via three-dimensional hot-wire anemometry surveys.
Frank Y. Wang, K. B. M. Q. Zaman
openaire +1 more source
Integral Solution for the Mean Flow Profiles of Turbulent Jets, Plumes, and Wakes
Journal of Fluids Engineering, Transactions of the ASME, 2003 Integral methods are used to derive similarity solutions for several quantities of interest including the cross-stream velocity, Reynolds stress, the dominant turbulent kinetic energy production term, and eddy diffusivities of momentum and heat for ...
Amit Agrawal +2 more
exaly +2 more sources
Wake and wake-induced shear-layer excitation in an annular jet
The Physics of Fluids, 1986The wake and wake-induced structures in the initial region of an annular jet (with a center body truncated at the jet exit plane) are studied from the measurements of velocity correlation and conditional sampling. Both sets of structures are found to play an important role in momentum transports and Reynolds stress production. They are also found to be
Lam, Kit Ming +2 more
openaire +3 more sources
Analysis of Wakes and Wake-Jet Interaction
2003The near wakes of a wing/engine configuration and a three-element wing segment are investigated. The analysis is focused on the development of the flap and wingtip vortices and their interaction with the engine jets in the near field. The essential details of the solution technique such as grid generation, turbulence modeling, boundary conditions and ...
E. Fares, W. Schröder
openaire +1 more source
Condensation Wake in a Nonisobaric Jet
Journal of Engineering Physics and Thermophysics, 2001We demonstrate the substantial effect of the nonisobaricity of an exhaust jet on the initial parameters of a condensation wake: distance to the wake, initial water content, ice content, optical thickness, and transverse dimension.
A. N. Kucherov, G. V. Molleson
openaire +1 more source
Structure of Turbulent Jets and Wakes
AIAA Journal, 1975The structure of two-dimensional turbulent jets and wakes is studied using two eddy viscosity models. The turbulent energy equation is used together with the mean momentum equations, and the system is closed by introducing eddy coefficients. The fine structure turbulence is obtained by applying proper boundary conditions at the mean turbulent ...
F. C. WANG, T. S. LUNDGREN
openaire +1 more source
The Journal of the Acoustical Society of America, 2011
This paper is concerned with similarities and differences between jets and wakes, as indicated by a sampling of the literature, including what tests and studies have been made in each case. As noted by Franken, jets and wakes are both characterized by a region of shear and (depending on the Reynolds number) high turbulence.
openaire +1 more source
This paper is concerned with similarities and differences between jets and wakes, as indicated by a sampling of the literature, including what tests and studies have been made in each case. As noted by Franken, jets and wakes are both characterized by a region of shear and (depending on the Reynolds number) high turbulence.
openaire +1 more source