12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2017-110

Main Topic:

Diffusers

https://doi.org/10.29008/ETC2017-110

Authors

Caglar Atalayer - IFAS, TU Braunschweig
Jens Friedrichs - IFAS, TU Braunschweig
Detlev Wulff - IFAS, TU Braunschweig

Abstract

S-duct intake component for a highly loaded turboprop engine was investigated considering its installation on a channel wing of an active high-lift aircraft using computational fluid dynamics. The objective is to observe the interaction effects of the propeller-nacellewing on the S-duct intake aerodynamics, especially when the intake is positioned at different azimuth angles with respect to rotation axis. Single scoop wrap-around type S-duct was integrated into a representative nacelle body. The propeller was modeled as an actuator disc for the slipstream effects. Steady-state Reynolds-averaged Navier-Stokes simulations were run using negative Spalart-Allmaras turbulence model. Although the results showed that the reference S-duct position at Φ= 270° had the relatively higher recovery than the other variations, significant improvements in total pressure distortion and intensities were achieved at Φ= 0° and 90° positions. Up to 3% decrease in swirl coefficient levels was observed when the wrap-around S-duct was positioned at Φ = 90° in comparison to reference position.

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