Seminar - Professor Yury S. Kachanov

The Fluids and Thermal Engineering Research Group warmly invites you to attend our seminar on Wednesday 26th October with refreshments at 15:00. The seminar will start at 15:30 and is open to the public and industrial companies also.

Turbulence Origin On Swept Wings

Professor Yury S. Kachanov
Main Research Scientist of the Khristianovich Institute of Theoretical and Applied Mechanics of Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation

Abstract
We all fly on airplanes having arrow-type wings. Idealized, spanwise-uniform models of the arrow-type wings are called ‘swept wings’. The problem of the laminar-turbulent transition in boundary layers of swept wings is very important in the modern aerodynamics. The most important aspects of this problem are: (i) physical mechanisms of transition, (ii) ways of transition prediction and (iii) means of transition control. My talk will be devoted to a brief review of results of recent studies of all these aspects. I will tell about main stages of the laminar-turbulent transition occurred in swept-wing boundary layers at low and high freestream turbulence levels in presence and in absence of significant surface roughness. I will describe the problem of calculation of the transition location on swept wings, including some new criteria of the transition beginning and some advanced methods of transition prediction. Finally I will discuss briefly the transition control problem.