Experimental and Numerical Investigations of Flow Incidence Effects on Surface Pressure Distributions and Velocity Profile of Axial Compressor Blades
Department of Mechanical and Aerospace Engineering , Science and Research Branch, Islamic Azad University, Tehran , Iran
Email: firstname.lastname@example.org , 09395059318
Abstract: Cascade data are essential in design process of any turbo machine blades. These data consist of variations of losses, pressure rise, surface pressure distributions and outlet flow angle in terms of Reynolds number, inlet Mach number and flow incidence. Compressor designers use these set of data not only for selection of profile geometry to suit their predicted on design performance, but also to meet off design conditions. Blade incidence may change due to many factors. These factors mainly consist of rotational speed of the compressor axis and inlet flow conditions. Design point in majority of turbo machines does not necessarily correspond to zero incidences. As a result, cascade data at various incidences would be vital during design performance. In the present research work, intensive investigations were performed on axial compressor blades from experimental and numerical point of views. In this paper, results are confined to variations of surface pressure distributions versus flow incidence. In parallel to the wind tunnel tests flow characteristics were studied using computational fluid dynamics (CFD) technique. Reynolds averaged Navier-Stokes equations were solved using realizable K-ε turbulence modelling.
[Reza Eftekhari. Experimental and Numerical Investigations of Flow Incidence Effects on Surface Pressure Distributions and Velocity Profile of Axial Compressor Blades. Life Sci J 2013;10(4s):221-228]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 33
Keywords: Compressor cascade flows, Surface pressure distribution, Incidence Effects, Turbulence modelling.