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http://dx.doi.org/10.5139/JKSAS.2003.31.2.010

Numerical Study of Unsteady Supersonic Flow over Tandem Cavities  

Song, Byeong Ho (조선대학교)
Park, Nam Eun (조선대학교)
Kim, Jae Su (조선대학교)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.2, 2003 , pp. 10-16 More about this Journal
Abstract
The unsteady supersonic flow over tandem cavities has been analyzed by the integration of Navier-Stokes equations with the k-$\varepsilon$ turbulence model. The unsteady flow is characterized by the periodicity due to the mutual relation between the shear layer and the internal flow in cavities. The upwind TVD scheme based on the flux vector split with the van Leer limiters is used. The results show the principal frequency is very reasonable. The principal frequency of the rear cavity due to the front cavity has been analyzed by the combination of the several aspect ratios of cavities. In the case of the front cavity of low aspect ratio, the frequencies of tandem cavities are almost same, because two shear layers developed from each cavity are mixed and developed to one shear layer. However, in the case of the front cavity of high aspect ratio, the characteristis of frequency are very different, because the second shear layer is developed in the diffused first shear layer.
Keywords
Unsteady Supersonic Flow; Tandem Cavity Flow; κ-ε Turbulence Model; Upwind TVD Scheme;
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