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Related Experiment Videos

Transonic injection in interaction with transverse compressible flow.

R Dizene1, J M Charbonnier, E Dorignac

  • 1Laboratoire d'Etudes Aerodynamiques, Poitiers, France. dizene@yahoo.fr

Annals of the New York Academy of Sciences
|December 24, 2002
PubMed
Summary

This study models blade cooling by examining transonic jets interacting with transverse flow. Results reveal how coolant injection angle affects heat transfer in turbomachinery applications.

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Area of Science:

  • Fluid dynamics
  • Heat transfer
  • Turbomachinery

Background:

  • Blade cooling is critical for turbomachinery performance and longevity.
  • Existing research often models tangential coolant injection.
  • This study addresses coolant injection from non-tangential slots, where freestream interaction is significant.

Purpose of the Study:

  • To experimentally investigate the interaction of a row of transonic jets with a transverse flow.
  • To analyze the impact of coolant injection angle on flow patterns and heat transfer.
  • To provide data for optimizing blade cooling in gas turbine engines.

Main Methods:

  • Experimental study of a turbulent boundary layer with heat transfer.
  • Utilized a row of jets injected at a 45-degree angle to the mainstream flow.

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  • Employed surface flow visualization and surface temperature mapping.

    • Main Results:

    • Detailed visualization of surface flow patterns under jet-transverse flow interaction.
    • Mapping of surface temperature distributions, highlighting heat transfer characteristics.
    • Observed significant interaction effects between the injected coolant and the freestream flow.

    Conclusions:

    • The study provides crucial experimental data on non-tangential coolant injection for blade cooling.
    • Understanding freestream-coolant interaction is key to improving cooling efficiency.
    • Results inform the design of more effective cooling strategies for turbomachinery components.