Analysis of Flow Oscillations in an Open Cavity by a Passive Control Method
Yogesh Madaria1, Rajender Angidi2
1Yogesh Madaria, Department of Mechanical Engineering, Malla Reddy Engineering College, Secunderabad, Telangana, India.
2Rajender Angidi, Department of Mechanical Engineering, Malla Reddy Engineering College, Secunderabad, Telangana, India.
Manuscript received on 05 March 2019 | Revised Manuscript received on 12 March 2019 | Manuscript Published on 20 March 2019 | PP: 508-512 | Volume-8 Issue- 4S2 March 2019 | Retrieval Number: D1S0110028419/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Numerical simulations are performed to evaluate a submissive controller method, utilised to suppress the pressure oscillation made in an open cavity flow. The open cavity considered in this work has the aspect ratio of 2 (Length of the cavity/Depth of the cavity=2). As the passive control technique, a non-smooth surface is installed, upstream of the cavity. The parameters like flow instability, noise around cavity are investigated using large eddy simulation, coupled with acoustics model, for smooth and non-smooth cases. The experimental and computational data available in literature are utilized for validation of results for the smooth case. By flow visualizations, it is established that locating a non-smooth surface at the upstream effectively suppresses hollow stream oscillations. By comparing the current ground structures in cases of smooth and non-smooth surfaces, the mechanism of oscillation control by non-smooth surface is analysed.
Keywords: Passive Control, Pressure Oscillation, Open Cavity Flow, Numerical Simulation, non-Smooth Surface, Large Eddy Simulation.
Scope of the Article: Mechanical Maintenance