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Application of Unsteady Laminar Triple-Deck Theory to Viscous-Inviscid Interactions from an Oscillating Flap in Supersonic Flow

  • Ming-Ke Huang
  • G. R. Inger
Conference paper

Abstract

The formal asymptotic triple-deck theory of unsteady free laminar viscousinviscid interactions for purely supersonic or subsonic inviscid flow has been developed in general by Ryzhov and Zhuk [401] as an extension of the steady flow theory due to Stewartson and Williams [232]. Their results for the leading approximation as Reynolds number Re → ∞ indicate that when the reduced frequency based on reference length L* and freestream velocity \( \omega *L*/U_\infty ^* < 0(\operatorname{Re} ^{{\raise0.7ex\hbox{$1$} \!\mathord{\left/ {\vphantom {1 4}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{$4$}}} ) \), the explicit unsteady effect remains only in the viscous lower-deck equations, the inviscid disturbance flow in the overlying middle (main) and outer decks being quasi-steady. Schneider [402] has also given a fundamental analysis of unsteady disturbances in purely supersonic outer flow for arbitrary amplitudes in which, unlike the aforementioned free-interaction case, the amplitude governs the streamwise interactive scale; he also found that the quasi-steady approximation fails near the wall.

Keywords

Supersonic Flow Hinge Line Logarithmic Decrement Lower Deck Upstream Influence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • Ming-Ke Huang
  • G. R. Inger
    • 1
  1. 1.Department of Aerospace Engineering SciencesUniversity of ColoradoBoulderUSA

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