The goal of this work is to develop low order dynamical systems models for the unsteady aerodynamic forces on small wings and to better understand the physical characteristics of unsteady laminar separation. Reduced order models for a fixed, high angle of attack flat plate are obtained through Galerkin projection of the governing Navier-Stokes equations onto POD modes. Projected models are comp...

The dynamic stall phenomenon is characterized by the formation of a leading-edge vortex, which responsible for adverse aerodynamic forces and moments adversely impacting structural strength life system. Aerodynamic shape optimization (ASO) provides cost-effective approach to delay or mitigate characteristics. Unfortunately, ASO requires multiple evaluations accurate but time-consuming computati...

An experimental study is conducted to research the combined effect of leading-edge (LE) tubercles and internal slots on Clark-Y airfoil at Reynolds numbers (Re) 5.0×104, 7.5×104, 1.0×105 for angles attack ranging from 0° 30°. The a cambered that performs well low medium numbers, having maximum thickness 11.7% 28% chord. Five different test models are subjects experiments, one which baseline. ot...

The present research investigates the torsional aeroelasticity of the blade of an H-type vertical axis wind turbine subject to stall and post-stall conditions in various Reynolds regimes, which is experienced by the blade in a full revolution. In order to simulate the aerodynamics, a new model based on a combination of the Double Multi Streamtubes (DMST) model and the nonlinear multi-criteria C...

Blower and exhaust fans consume over 30% of electricity in a thermal power plant, and faults of these fans due to rotation stalls are one of the most frequent reasons for power plant outage failures. To accurately predict the occurrence of fan rotation stalls, we propose a support vector regression machine (SVRM) model that predicts the fan internal pressures during operation, leaving ample tim...

This paper investigates the preliminary wing design of Unmanned Aerial Vehicle (UAV) using a two step optimization approach. The first step is a single objective aerodynamic optimization whereas the second step is a coupled dual objective aerodynamic and structural optimization. In the single objective case, airfoil geometry is optimized to get maximum endurance parameter at a 2D level with max...

This paper proposes a linear parameter varying (LPV) model reference-based control for fixed-wing unmanned aerial vehicles (UAVs), which achieves agile and high performance tracking objectives in extended flight envelopes, e.g. when near stall or deep stall flight conditions are considered. Each of the considered control loops (yaw, pitch and airspeed) delivers an error model that can be reshap...

Wing morphing as a means to continuously modify wing geometry is employed in numerical simulation order act upon aerodynamic performance cruise flight. In this flight regime, the interaction of shock wave and boundary layer instabilities can lead transonic buffet, coordinated motion both detached layer. This flow instability induces unsteady forces on which may induce dip-flutter or cause stall...

The aerodynamic characteristics of a modern road cycling wheel in crosswind are studied through force measurements and 3D velocimetry TU Delft’s Open Jet Facility. performance the 62 mm deep rim is evaluated for two tire profiles, yaw angles up to 20◦ . All executed at 12.5 m/s (45 km/h) freestream- wheel-rotational velocity. wheel’s rim-tire section found behave similar an airfoil incidence, u...