Application of Background Oriented Schlieren Technique for Investigations of a Non-Stationary Flow With Shock Waveстатья
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Аннотация:Experimental visualization of non-stationary Gas Flow with local Areas of supersonic Flow WAS Conducted by Means of Background Oriented Schlieren (BOS) Technique. We have acquired images of sequential stages of complex shock-induced flow that originates when a propagating shock wave emerges from the channel of the shock tube of rectangular cross-section. Obtained BOS shift fields allowed to analyze structural features of the flow. Also, A 3D fluid simulation Dynamics (CFD) WAS Carried out, based on the Euler system. Results demonstrate qualitative agreement of calculated and visualized images of the flow. Matching Data includes time-resolved positions of specific Flow Elements, such as the Front of A shock wave with Mach number 1.5, and Dynamics of toroidal vertical structure.