Faculty Publications

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Publications by NITK Faculty

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    Squeezing of Bingham Fluid Between Two Plane Annuli
    (Springer Heidelberg, 2018) Singeetham, S.; Vishwanath, K.P.
    In this study, the presence of Bingham fluid between two parallel plane annuli with constant squeeze motion is theoretically analyzed. The effect of radius of separation on core thickness, pressure distribution, and squeeze force for different values of Bingham number has been investigated. By considering equilibrium of an element of the core in the fluid, thickness of the rigid plug core has been calculated numerically. The properties of the squeeze film are investigated through the non-Newtonian effects on the squeeze force of the plane for various annular spaces. © Springer Nature Singapore Pte Ltd 2018.
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    A Computational Study on B-Splines-Based Design Parameterization Strategy for Compressor Annulus for Throughflow Analysis
    (Springer Science and Business Media Deutschland GmbH, 2023) Damle, M.; Arumuga Perumal, A.P.
    In this paper, a B-spline-based design parameterization strategy used for preliminary axial compressor design stage is presented. This strategy is critically important for multi-objective optimization problems with contrasting objectives for discovering better compressor configurations. It helps in reducing computation time drastically along with computation costs. In this case, B-splines are used for smooth parameterization of compressor annulus hub and tip lines. The target is to minimize discrepancies between original annulus contour and fitted data. Annulus geometry is modified by perturbing fitted annulus splines at required curve segments while maintaining necessary continuity conditions. Effect of geometry modifications on different flow parameters impacting compressor performance is also studied with the help of throughflow analysis based on streamline curvature method. Conducted investigations compare aerodynamic characteristics of fitted and modified annulus design with respect to the reference design. Additionally, by use of normalization approaches, the present method can be useful to compressor configurations with different length, number of stages and annulus contour. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.