منابع مشابه
Direct Numerical Simulation of a Sonic Round Jet in a Turbulent Supersonic Cross Flow
A direct numerical simulation of a round under-expanded sonic jet in turbulent supersonic cross flow has been carried out. The objective is to investigate the mixing mechanism which occurs downstream the jet by use of a passive scalar variable. The Navier-Stokes equations in the cylindrical geometry are solved by use of multiblock overlapping meshes. The method has been validated with a laminar...
متن کاملDirect numerical simulation of a temporally-developing subsonic round jet and its sound field
A temporally-developing isothermal round jet at a Mach number of 0.9 and a diameterbased Reynolds number of 3125 is computed by direct numerical simulations in order to investigate its turbulent development and its generated noise. The simulations are performed using high-order finite differences on a grid of 940 million points extending up to 120 jet radii in the axial direction. Snapshots and...
متن کاملDirect numerical simulation of round turbulent jets in crossflow
Direct numerical simulation is used to study a round turbulent jet in a laminar crossflow. The ratio of bulk jet velocity to free-stream crossflow velocity is 5.7 and the Reynolds number based on the bulk jet velocity and the jet exit diameter is 5000. The mean velocity and turbulent intensities from the simulations are compared to data from the experiments by Su & Mungal (2004) and good agreem...
متن کاملNUMERICAL SIMULATION of the INTERFACES of a JET STREAM
This paper aims to study the evolution of interfaces of a jet stream flowing in a stationary medium. The medium and the jet stream have been considered inviscid, surface tension effects have been neglected and there is a density jump across the interface between the stream and the media, within the jet stream and outside in the surrounding media density remains uniform. Due to discontinuity in ...
متن کاملDirect Numerical Simulation of Jet Actuators for Boundary Layer Control
The paper presents a method to perform direct numerical simulations (DNS) of a jet actuator flow inside a turbulent flat plate boundary layer (TBL). A structured finite difference method is used for the simulations. The numerical scheme is adapted to account for the large scale differences both in geometric and fluid dynamic aspect. Analytical mesh transformations have been implemented to resol...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
سال: 1994
ISSN: 0387-5016,1884-8346
DOI: 10.1299/kikaib.60.2022