GEOMETRIC MODELLING OF TURBULENT FLAT JETS IN ACCOMPANYING AND CONTRARY FLOWS
Olena GUMEN1, Volodymyr DOVHALIUK2, Viktor MILEIKOVSKYI2
1National Technical University of Ukraine “Kyiv Polytechnic Institute”
2Kyiv National University of Construction and Architecture
BoZPE 2015;(1):70–77
Article (PDF)
KEYWORDS
turbulent flow, turbulent jet, vortex, puff, method of singularities
TOPICS
Energy-efficient construction, Building installations
ABSTRACT
We offer an approach to describe turbulent jets in accompanying and contrary flows without using experimental coefficients and additional values (turbulent viscosity, mixing path length etc.). It is based on the theory developed by professor of Kyiv National University of Construction and Architecture A. Tkachuk. The analogy between an ideal liquid flow and developed turbulent flow allows describing surfaces of tangential velocity rupture by vortex sheets. We continue this research direction by analysis of jet flows with large-scale vortices (puffs) by geometric and kinematic analysis of this macrostructure. The results have good correlation with well-known experimental data. We analytically obtain conditions of the jet existence in contrary flow. This approach may help for efficient development of new air distribution devices of energy efficient air exchange organization.
Politechnika Częstochowska uczelnią dostępną.
