scholarly journals Experimental Investigation of a Flexible Wing with a Variable Camber Continuous Trailing Edge Flap Design

2014 ◽  
Author(s):  
Nhan T. Nguyen ◽  
Eli Livne ◽  
Nathan Precup ◽  
James M. Urnes ◽  
Chester Nelson ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Trailing Edge ◽  
Flexible Wing ◽  
Flap Design ◽  
Trailing Edge Flap

Effect of Trailing-Edge Flap Deflection on a Symmetric Airfoil Over a Wavy Ground

2018 ◽  
Vol 141 (6) ◽  
Author(s):  
V. Tremblay-Dionne ◽  
T. Lee
Keyword(s):  
Experimental Investigation ◽  
Pitching Moment ◽  
Cyclic Variation ◽  
Trailing Edge ◽  
Opposite Trend ◽  
Aerodynamic Properties ◽  
Trailing Edge Flap ◽  
Flap Deflection ◽  
Naca 0015

The effect of trailing-edge flap (TEF) deflection on the aerodynamic properties and flowfield of a symmetric airfoil over a wavy ground was investigated experimentally. This Technical Brief is a continuation of Lee and Tremblay-Dionne (2018, “Experimental Investigation of the Aerodynamics and Flowfield of a NACA 0015 Airfoil Over a Wavy Ground,” ASME J. Fluids Eng., 140(7), p. 071202) in which an unflapped airfoil was employed. Regardless of the flap deflection, the cyclic variation in the sectional lift Cl and pitching moment Cm coefficients over the wavy ground always persists. The Cm also has an opposite trend to Cl. The flap deflection, however, produces an increased maximum and minimum Cl and Cm with a reduced fluctuation compared to their unflapped counterparts. The Cd increase outperforms the Cl increase, leading to a lowered Cl/Cd of the flapped airfoil.

Robust Design of Helicopter Rotor Flaps Using Bat Algorithm

2018 ◽  
pp. 418-445
Author(s):  
Rajnish Mallick ◽  
Ranjan Ganguli
Keyword(s):  
Bat Algorithm ◽  
Trailing Edge ◽  
Baseline Design ◽  
Interaction Terms ◽  
Aeroelastic Analysis ◽  
Flap Design ◽  
Bladed Rotor ◽  
Trailing Edge Flap ◽  
Polynomial Response Surface ◽  
Actuation Power

The objective of this chapter is to determine an optimal trailing edge flap configuration and flap location to achieve minimum hub vibration levels and flap actuation power simultaneously. An aeroelastic analysis of a soft in-plane four-bladed rotor is performed in conjunction with optimal control. A second-order polynomial response surface based on an orthogonal array (OA) with 3-level design describes both the objectives adequately. Two new orthogonal arrays called MGB2P-OA and MGB4P-OA are proposed to generate nonlinear response surfaces with all interaction terms for two and four parameters, respectively. A multi-objective bat algorithm (MOBA) approach is used to obtain the optimal design point for the mutually conflicting objectives. MOBA is a recently developed nature-inspired metaheuristic optimization algorithm that is based on the echolocation behaviour of bats. It is found that MOBA inspired Pareto optimal trailing edge flap design reduces vibration levels by 73% and flap actuation power by 27% in comparison with the baseline design.

Numerical and Experimental Investigation of Trailing Edge Flap Performance on a Model Wind Turbine

2018 ◽  
Author(s):  
David Marten ◽  
Sirko Bartholomay ◽  
George Pechlivanoglou ◽  
Christian Nayeri ◽  
Christian O. Paschereit ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Wind Turbine ◽  
Trailing Edge ◽  
Trailing Edge Flap

Experimental investigation of the ground effect on a wing without/with trailing edge flap

2020 ◽  
Vol 52 (4) ◽  
pp. 045504
Author(s):  
Khalida Sekhoune Özden ◽  
İlyas Karasu ◽  
Mustafa Serdar Genç
Keyword(s):  
Experimental Investigation ◽  
Ground Effect ◽  
Trailing Edge ◽  
Trailing Edge Flap
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