Hypersonic Stability Analysis of a Flared Cone
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abstract
The JoKHeR computational tool is used to provide linear and nonlinear parabolized stability equation analysis of the Langley 93-10 flared cone. The second-mode instability mechanisms and their response to slight angle of attack changes and temperature variation is explored and compared to experiments in the Mach 6 Quiet Tunnel located at Texas A&M University. The most-amplified second-mode frequency is found to be sensitive to small incidence angles. In an effort to better model broadband initial conditions, the effects on boundary-layer stability are compared for multiple discrete and single discrete primary modes and their harmonics. The inclusion of multiple primary modes results in a noticeable difference in N-factors when compared to the single primary mode case. The multiple mode interactions were found to increase the nonlinear stabilization effect and may be affecting the flow of energy into the primary modes from the mean flow. Mean flow distortion widens and compresses the boundary layer and is tuning lower and higher frequencies respectively. 2013 by Kocian,Perez,Oliviero,Kuehl,Reed.
name of conference
51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
