Abstract
An experimental installation has been developed and manufactured for the investigation of Görtler’s stability. Curved plates with different curvatures and generators of longitudinal vortex systems in the boundary layer (BL) are manufactured. A brief review of the performed studies of Görtler’s stability is given. Using the Wortmann tellurium method, visualization and quantitative measurements of the characteristics of the BL during the flow around curvilinear plates were performed. The profiles of the longitudinal velocity of the BL on rigid concave plates were measured using a laser Doppler velocity meter (LDVM). Systems of longitudinal vortices were introduced into the BL of curvilinear plates. The interaction of introduced longitudinal vortices with natural longitudinal vortices arising during the flow around curvilinear plates is investigated. The parameters of stable vortex systems are determined, which are plotted on the Görtler’s stability diagram. The development of vortex structures in various regions of the vortex chamber is experimentally investigated. The study was carried out using various flow visualization methods and quantitative methods. A model for the development of vortex structures and their interaction in a vortex chamber is constructed. The parameters of the Görtler’s vortices arising on the inner surface behind the nozzle of the vortex chamber are experimentally investigated.
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