Effectiveness of a Dimpled Non-Even Surface For Oscillations Control For Flow Over Fissure: Numerical Analysis
YogeshMadaria1, Vijay Kanjarla2
1YogeshMadaria, Department of Mechanical Engineering, Malla Reddy Engineering College (A), Secunderabad (Telangana), India.
2Vijay Kanjarla, Department of Mechanical Engineering, Malla Reddy Engineering College (A), Secunderabad (Telangana), India.
Manuscript received on 09 February 2019 | Revised Manuscript received on 22 February 2019 | Manuscript Published on 04 March 2019 | PP: 512-516 | Volume-7 Issue-5S2 January 2019 | Retrieval Number: ES2093017519/19©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: To decay the pressure oscillation in the flow above an open crater, a passive control method, namely introduction of a dimpled non-even surface, is attempted. This paper presents the numerical analysis of the above system, which was undertaken to govern the effectuality of the said control modem. This work focuses on an open fissure with the length-to-depth ratio in proportions of 1: 2. To check the oscillation persuaded in the flow, a textured non-even surface is fitted at the upstream of the crater. The even and dimpled non even cases are compared for the flow instability and noise around fissure. Large eddy simulation coupled with acoustic model is utilized as a tool for this. The results obtained for even cases were compared with available experimental and computation data. On the basis of flow visualizations, it can be said that introduction of dimpled non-even surface upstream was significantly effective in suppressing the oscillations in fissure flow. Based on the comparison of flow filed structure in the even and dimpled non-even cases, the control mechanism of void oscillation technique is evaluated.
Keywords: Fissure Flow Oscillation, Passive Control, Numerical Simulation, Dimpled Non-Even Surface.
Scope of the Article: Quality Control