Effect of initial conditions on a circular jet |
| |
Authors: | R A Antonia Q Zhao |
| |
Institution: | (1) Department of Mechanical Engineering University of Newcastle, Newcastle NSW 2308, Australia e-mail: meraa@cc.newcastle.edu.au, AU |
| |
Abstract: | Two circular jets are considered. One issues from a contraction with a laminar top-hat velocity profile. The other exits
from a pipe with a fully developed turbulent mean velocity profile. In spite of the significantly different initial conditions,
spectra of axial and radial velocity fluctuations in the far field (x≳30d, where d is the jet diameter) collapse over scales ranging from the Kolmogorov length scale to a length scale characterizing the organized
motion. This agreement is consistent with the observation that, at the measurement station, the large-scale anisotropy is
unchanged between the two flows.
Received: 21 September 2000/Accepted: 5 March 2001 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|