CONTRA-ROTATING PROPELLER AERODYNAMICS SOLVED BY A 3D PANEL METHOD WITH COUPLED BOUNDARY LAYER

Authors

DOI:

https://doi.org/10.14311/AP.2017.57.0355

Keywords:

3D panel method, boundary layer, force-free wake, contra-rotating propeller, strong interaction

Abstract

The aerodynamics of contra-rotating propellers is a complex three-dimensional problem of an unsteady flow, which is often approached by assuming numerous simplifications. Presented computational model combines a 3D panel method with a force-free vortex wake and a two-dimensional two-equation boundary layer model in an attempt to capture all the main contributing elements of the flow physics. An emphasis is placed on the interaction of the viscous boundary layer region with the inviscid region and the development of a portable method of their coupling. The kinematics of a force-free vortex wake is supplemented with a vortex aging due to a diffusion. Extra attention is paid to the process of the blade passing through the wake of another blade. To demonstrate the ability of the numerical model, several test cases are presented, illustrating the reaction of the system to various operational conditions.

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Author Biographies

  • Vít Štorch, Czech Technical University in Prague, Faculty of Mechanical Engineering
    Assistant at the Department of Fluid Dynamics and Thermodynamics
  • Jiří Nožička, Czech Technical University in Prague, Faculty of Mechanical Engineering
    Professor at the department of Fluid Dynamics and Thermodynamics

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Published

2017-10-31

Issue

Vol. 57 No. 5 (2017)

Section

Articles

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How to Cite

Štorch, V., & Nožička, J. (2017). CONTRA-ROTATING PROPELLER AERODYNAMICS SOLVED BY A 3D PANEL METHOD WITH COUPLED BOUNDARY LAYER. Acta Polytechnica, 57(5), 355-366. https://doi.org/10.14311/AP.2017.57.0355