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TsAGI Science Journal

ISSN Печать: 1948-2590
ISSN Онлайн: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2011004288
pages 593-612

INVESTIGATION OF SECONDARY DISTURBANCE DEVELOPMENT IN A BOUNDARY LAYER USING THE PARABOLIZED STABILITY EQUATIONS METHOD

Maxim Vladimirovich Ustinov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia

Краткое описание

The effective numerical method intended for computation of the amplification factors of secondary disturbances in a boundary layer modulated by large-amplitude periodic primary perturbations is developed. It is based on the computation of perturbations induced by an ambient volumetric force in the form of a traveling wave using the modified parabolic stability equations (PSE) method. Computation starts from zero initial conditions unlike in the ordinary PSE-method, which requires accurate initial conditions found from the eigenfunction of the secondary instability mode. This makes the time-consuming two-dimensional eigenvalue problem solution unnecessary when starting the amplification curve computation. An elaborated technique was applied in the analysis of secondary instability of the streaky structure in a flat-plate boundary layer excited by streamwise vorticity in a free stream.


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