Experimental
Experimental and Numerical Investigations of Flow
Incidence Effects on Surface Pressure Distributions and Velocity Profile of
Axial Compressor Blades
Reza Eftekhari
Department of Mechanical and Aerospace Engineering , Science and
Research Branch, Islamic Azad University, Tehran , Iran
Email: [email protected] , 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.
