Aerodynamic drag is the cause for more than two-thirds of the fuel consumption of large trucks at highway speeds. Due to functionality considerations, the aerodynamic efficiency of the aft regions of large trucks was traditionally sacrificed. This leads to massively separated flow at the lee side of truck trailers, with an associated drag penalty: roughly a third of the total aerodynamic drag. ...

Abstract The paper investigates the flow behavior near NACA 64-618 airfoil profile of blade tip section a wind turbine for electric power production after short icing event. simulation considering rotation speed is performed to assess effect on aerodynamic characteristics. Degradation characteristics affects electrical energy turbine. lift and drag coefficients are calculated different angles a...

Rotating stall is a primary constraint for the performance of axial #ow compressors. This paper establishes a necessary and su$cient condition for a feedback controller to locally stabilize the critical equilibrium of the uniform #ow at the inception of rotating stall. The explicit condition obtained in this paper provides an e!ective synthesis tool for rotating stall control. 2001 Elsevier Sci...

The paper presents results of iced airfoil performance in comparison to experimental data using a newly developed CFD based twodimensional ice accretion and anti-icing simulation code, CANICE2D-NS. In CANICE2D-NS, a Serial Multi-Block (SMB) Navier-Stokes CFD code has been coupled with the CANICE2D panel/boundary-layer method based icing code. The new coupling is being used for the flow analysis...

T he increase of the thrust-to-weight ratio of modern gas-turbine engines results in higher loads and a reduced number of blades and stages for the compressor. The designer must ensure the acceptable performance of each compressor stage (efficiency and stable operating range) and control the rising risk of blade boundary layer separation. This can be obtained using passive or active control dev...

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Based on a detailed analysis of recent loss-of-control events, the Aircraft State Awareness Joint Safety Analysis Team has identified the need to develop algorithms and display strategies to provide control guidance for recovery from approach-to-stall or stall. In order to be effective, such guidance should enhance the pilot’s ability to execute the Federal Aviation Administration’s recommended...

Canard configuration on fighter planes is essential for regulating flow and the occurrence of vortex interactions main wing, one which to delay stall. Stall delays are useful when aircraft making maneuvering or short-landing. This study observed effect canard various models. Fighter models represented different configurations, such as Sukhoi SU-30 MKI, Chengdu J-10, Eurofighter Typhoon. Water t...