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Active Vortex Shedding Control for Flow Over a Circular Cylinder Using Rearward Jet Injection at Low Reynolds Number

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Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering (I-DAD 2018)

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Abstract

The present work is the study of flow over circular cylinder with rearward jet injection towards the control of vortex shedding. A circular cylinder surrounded by large rectangular computational domain is considered for the simulations. A slot is provided at the rear end of the cylinder to enable injection. Validation is performed for the base case, i.e. without rearward injection. Reynolds number of 100 is considered for the present study which is well below the transitional regime and just above the laminar regime where vortex shedding is present. Simulations are carried out using ANSYS-FLUENT with laminar flow governing equations. Simulations are performed for various blow ratios, and the time series of drag and lift coefficients were recorded. Power spectral density of the time series data and streamlines for different cases provide information on the flow physics. The phenomenon of vortex shedding and its control is studied in detail, and the physical reasons are discussed in detail in correlation with various plots and streamlines. It is found that the shedding has completely suppressed for the higher injection ratio values above 1.5.

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Correspondence to S. Senthilkumar .

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Karthikeyan, S., Kannan, B.T., Senthilkumar, S. (2019). Active Vortex Shedding Control for Flow Over a Circular Cylinder Using Rearward Jet Injection at Low Reynolds Number. In: Chandrasekhar, U., Yang, LJ., Gowthaman, S. (eds) Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering (I-DAD 2018). Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-2697-4_15

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  • DOI: https://doi.org/10.1007/978-981-13-2697-4_15

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-2696-7

  • Online ISBN: 978-981-13-2697-4

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