Impacts of Laser Energy Deposition on Flow Instability over Double-Cone Model
Impacts of Laser Energy Deposition on Flow Instability over Double-Cone Model
- New search for: Pham, Hoang Son
- New search for: Pham, Hoang Son
- New search for: Shoda, Tatsuro
- New search for: Tamba, Takahiro
- New search for: Iwakawa, Akira
- New search for: Sasoh, Akihiro
In this study, the effectiveness of repetitive laser pulse energy deposition over a double-cone model in a Mach 1.92 flow (half-apex angles of 22 and 40 deg) was investigated experimentally. The Reynolds number, based on the model’s outer diameter, was 3×105. Because of the shock wave/boundary-layer interaction, the shock wave over the cone’s transition corner exhibited an inherent low-frequency oscillation with a characteristic frequency of 6.3 kHz. Using high-frequency laser deposition of up to 80 kHz, the oscillation of the shock system was suppressed. Although the boundary layer experienced “sweeping” by laser-heated rings with a primary frequency equal to that of the energy deposition, the shock system above the bubble passage experienced frequency modulation to a much lower frequency range, and the shock wave location was stabilized.
Document information
Impacts of Laser Energy Deposition on Flow Instability over Double-Cone Model
AIAA journal ; 55 , 9
2017
Article (Journal)
English