Camber (aerodynamics) ≈ Camber (aerodynamics)
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Geometric Comparison of Aerofoil Shape Parameterization Methods Open
A comprehensive review of aerofoil shape parameterisation methods that can be used for aerodynamic shape optimisation is presented. Seven parameterisation methods are considered for a range of design variables: CSTs; B-Splines; Hicks-Henne…
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Chiral topologies for composite morphing structures – Part I: Development of a chiral rib for deformable airfoils Open
The paper moves from a technological process developed in previous works to produce chiral honeycombs made of thin composite laminates. Such approach is applied in this work to manufacture the morphing ribs for a variable camber wing‐box. …
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A new non-linear vortex lattice method: Applications to wing aerodynamic optimizations Open
This paper presents a new non-linear formulation of the classical Vortex Lattice Method (VLM) approach for calculating the aerodynamic properties of lifting surfaces. The method accounts for the effects of viscosity, and due to its low com…
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Analysis of Different Blade Architectures on small VAWT Performance Open
The present paper aims at describing and comparing different small Vertical Axis Wind Turbine (VAWT) architectures, in terms of performance and loads. These characteristics can be highlighted by resorting to the Blade Element-Momentum (BE-…
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Optimization of the truss beam. Verification of the calculation results Open
The article presents a comparison of results of optimized calculation of a truss beam which was chosen as a combined construction. The results of calculation of a beam are compared using the method based on the properties of spacer systems…
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Effects of multiple vein microjoints on the mechanical behaviour of dragonfly wings: numerical modelling Open
Dragonfly wings are known as biological composites with high morphological complexity. They mainly consist of a network of rigid veins and flexible membranes, and enable insects to perform various flight manoeuvres. Although several studie…
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Aerodynamic optimization and mechanism design of flexible variable camber trailing-edge flap Open
Trailing-edge flap is traditionally used to improve the takeoff and landing aerodynamic performance of aircraft. In order to improve flight efficiency during takeoff, cruise and landing states, the flexible variable camber trailing-edge fl…
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Design of a Morphing Wingtip Open
An initial design of a morphing wingtip for a regional jet aircraft is developed and evaluated. The adaptive wingtip concept is based upon a chiral-type internal structure, enabling controlled cant angle orientation, camber, and twist thro…
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A compliant polymorphing wing for small UAVs Open
This paper presents the development of a novel compliant polymorphing wing capable of chord and camber morphing for small UAVs. The morphing wing can achieve up to 10% chord extension and ±20° camber changes. The design, modeling, sizing, …
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Design of compliant mechanism-based variable camber morphing wing with nonlinear large deformation Open
The morphing wing with large deformation can benefit its flight performance a lot in different conditions. In this study, a variable camber morphing wing with compliant leading and trailing edges is designed by large-displacement compliant…
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Design and experiment of concentrated flexibility-based variable camber morphing wing Open
The morphing wing has a significant positive effect on the aerodynamic performance of the aircraft. This paper describes a leading-edge of variable camber wing with concentrated flexibility based on the geared five-bar mechanism. The drivi…
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The Geometry and Mechanics of Insect Wing Deformations in Flight: A Modelling Approach Open
The nature, occurrence, morphological basis and functions of insect wing deformation in flight are reviewed. The importance of relief in supporting the wing is stressed, and three types are recognized, namely corrugation, an M-shaped secti…
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The function of resilin in honeybee wings Open
The present work aims to reveal morphological characteristics of worker honeybee (Apis mellifera) wings and demonstrate the function of resilin on camber changes during flapping flight. Detailed morphological investigation of the wings sho…
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Investigation of Blowing and Suction for Turbulent Flow Control on Airfoils Open
An extensive parametric study of turbulent boundary-layer control on airfoils via uniform blowing or suction is presented. The control is applied on either the suction or pressure side of several four-digit NACA-series airfoils. The consid…
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Raptor wing morphing with flight speed Open
In gliding flight, birds morph their wings and tails to control their flight trajectory and speed. Using high-resolution videogrammetry, we reconstructed accurate and detailed three-dimensional geometries of gliding flights for three rapto…
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The influence of wing morphology on the three-dimensional flow patterns of a flapping wing at bird scale Open
The effect of airfoil design parameters, such as airfoil thickness and camber, are well understood in steady-state aerodynamics. But this knowledge cannot be readily applied to the flapping flight in insects and birds: flow visualizations …
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Design, Manufacturing and Wind Tunnel Validation of a Morphing Compliant Wing Open
This paper describes the activities performed at Politecnico di Milano within the FP7–NOVEMOR Project framework for the design, manufacturing, and wind tunnel test of a wing model equipped with morphing leading and trailing edges based on …
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Development of a New Span-Morphing Wing Core Design Open
This paper presents a new design for the core of a span-morphing unmanned aerial vehicle (UAV) wing that increases the spanwise length of the wing by fifty percent. The purpose of morphing the wingspan is to increase lift and fuel efficien…
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Experimental Investigation on the Performance of NACA 4412 Aerofoil with Curved Leading Edge Planform Open
Aircraft wings are the lifting surfaces with the chosen aerofoil sections. The efficiency as well as the performance of an aircraft mostly depends on the aerodynamic characteristics e.g. lift, drag, lift to drag ratio, etc of wings. Beside…
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Mathematical Model of the Straight-line Rolling Tire – Rigid Terrain Irregularities Interaction Open
The article discloses a semi-empirical model of the zero-camber straight-line rolling tire – rigid terrain irregularities' interaction. Tire enveloping properties are modeled by a system of radial springs. During validation of the model, t…
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Knowledge-Based Shape Optimization of Morphing Wing for More Efficient Aircraft Open
An optimization procedure for the shape design of morphing aircraft is presented. The process is coupled with a knowledge-based framework combining parametric geometry representation, multidisciplinary modelling, and genetic algorithm. The…
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Numerical and experimental validation of a morphed wing geometry using Price-Païdoussis wind-tunnel testing Open
An experimental validation of an optimised wing geometry in the Price-Païdoussis subsonic wind tunnel is presented. Two wing models were manufactured using optimised glass fibre composite and tested at three speeds and various angle-of-att…
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Force generation and wing deformation characteristics of a flapping-wing micro air vehicle ‘DelFly II’ in hovering flight Open
The study investigates the aerodynamic performance and the relation between wing deformation and unsteady force generation of a flapping-wing micro air vehicle in hovering flight configuration. Different experiments were performed where fl…
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Experimental Investigation of Micro Air Vehicle Scale Helicopter Rotor in Hover Open
This paper describes a fundamental experimental study, which involved systematic performance and flowfield measurements (PIV) to understand and optimize the hover performance of a MAV-scale helicopter rotor operating at Reynolds numbers lo…
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Analytical results in transient brush tyre models: theory for large camber angles and classic solutions with limited friction Open
This paper establishes new analytical results in the mathematical theory of brush tyre models. In the first part, the exact problem which considers large camber angles is analysed from the perspective of linear dynamical systems. Under the…
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Stall Recovery of a Morphing Wing via Extended Nonlinear Lifting-Line Theory Open
Aircraft morphing provides advantages to traditional flight including drag reduction and maneuverability. Previous research indicates that smooth spanwise transitions in trailing-edge camber, representative of a biological analog, provide …
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Bats actively modulate membrane compliance to control camber and reduce drag Open
Bat wing skin is exceptionally compliant and cambers significantly during flight. Plagiopatagiales proprii, arrays of small muscles embedded in the armwing membrane, are activated during flight and are hypothesized to modulate membrane ten…
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An improved geometric parameter airfoil parameterization method Open
In the process of airfoil optimization, it is required to represent an airfoil with parameters, and the goal is to represent arbitrary airfoils with less parameters. In this paper, a new airfoil parameterization method is proposed, called …
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Design and Validation of a New Morphing Camber System by Testing in the Price—Païdoussis Subsonic Wind Tunnel Open
This paper presents the design and wind tunnel testing of a morphing camber system and an estimation of performances on an unmanned aerial vehicle. The morphing camber system is a combination of two subsystems: the morphing trailing edge a…
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Effects of Duct Cross Section Camber and Thickness on the Performance of Ducted Propulsion Systems for Aeronautical Applications Open
The axisymmetric flow field around a ducted rotor is thoroughly analysed by means of a nonlinear and semi-analytical model which is able to deal with some crucial aspects of shrouded systems like the interaction between the rotor and the d…