定断面流路内超音速二重剪断層流れの不安定性 -2次元流での超音速混合促進法を考える- [in Japanese] Instabilities of Confined, Supersonic, Double Shear Layer Flow -A candidate mixing enhancement scheme in two-dimensional flow configuration [in Japanese]
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The instabilities of confined, supersonic, double shear layer flow are examined in order to develop a mixing enhancement scheme in two-dimensional flow configuration. It is shown that flow confinement is essential to produce the skew-symmetric mode of instability wave which is responsible for rapid mixing in the subsequent nonlinear evolution stage. The linear stability analysis provides a design tool with which suitable flow configuration can be selected. Direct numerical simulation demonstrates that hydrogen gas slowly issued in between supersonic air streams menders, accelerates to supersonic speed and mixes with the air quickly without shock generation, thus leading to explosive combustion. The underlying new physics are explored.
- Aeronautical and Space Sciences Japan
Aeronautical and Space Sciences Japan 45(525), 564-574, 1997-10
The Japan Society for Aeronautical and Space Sciences