One of the particular features of flows with available large-scale vortices deals with specific mechanisms of fluid transport. Thus modifying vortex scales, one can affect processes of heat and momentum transfer near a wall. In this connection, experiments were carried out to demonstrate how a scale of a fluid motion can be changed both in transitional and turbulent boundary layers using an imposed spanwise-regular temperature distribution over the surface. This method was tested for flows under body forces where counter-rotating streamwise vortices are an inherent flow feature. An active mode of vortex generation is realized due to two independent variables, spanwise scale of induced vortices and temperature gradient over the surface that can be adjusted to current flow conditions. Velocity fields and spectrum redistribution in boundary layers with embedded streamwise vortices show efficiency and prospects of the proposed method to control turbulent transport.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Thermal-control technique to improve flow characteristics over curved and rotating surfaces


    Contributors:


    Publication date :

    2001-01-01


    Size :

    919413 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Thermal-control Technique to Improve Flow Characteristics over Curved and Rotating Surfaces

    Yurchenko, N. / Institute of Electrical and Electronics Engineers / NASA et al. | British Library Conference Proceedings | 2001


    Free-Surface Flow Over Curved Surfaces

    Berger, Rutherford C. Jr. / University of Texas at Austin. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1993

    Free access


    Numerical investigation of film cooling effectiveness over rotating curved surfaces: blowing ratio and curvature effect

    Hong, W. / Henghui, M. / Zhenming, Z. et al. | British Library Online Contents | 2009