Results 221 to 230 of about 12,726 (261)

An Investigation Into the Aerodynamic Efficiency of Tailles Aircraft

47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009
From the perspective of aerodynamics, tailless aircraft are defended by many as potentially the most efficient aircraft configuration. The supporting argument being that the reduced surface area resulting from the tailless configuration directly results in reductions in drag.
Aliya Valiyff, Maziar Arjomandi
openaire   +1 more source

Improving aerodynamic efficiency of a Skywalker drone

AIP Conference Proceedings, 2020
Nowadays, fixed wing drones are being adapted widely into many industries. However, fixed wing drones are relatively more costly than quadcopter drones and have a lot of improvement to be made. For example, in terms of aerodynamic efficiency. This paper aims to improve the flight time of a Skywalker drone by using a different airfoil for the wing.
null Jayavarman, Abdulkareem Sh. Mahdi Al-Obaidi, Swee King Phang, Yong Guan How   +3 more
openaire   +1 more source

AeroINR: Meta-learning for Efficient Generation of Aerodynamic Geometries [PDF]

Effective optimisation of aerodynamic shapes requires high-quality parameterisation of candidate geometries. In recent years, the increasing availability and applicability of data - through increasing computational power, GPUs, cloud storage and AI - has motivated the development of data-driven approaches to the parameterisation problem, particularly ...
Tom Bamford, David Toal, Andy J. Keane
openaire   +1 more source

Aerodynamic efficiency of axial flapping kinematics

Australian Journal of Mechanical Engineering, 2019
In the present study, an innovative concept of axial flapping wing model is analysed to study and improve the aerodynamic efficiency for vertical takeoff microaerial vehicle.
Vishnu Kumar G C, Dilip A Shah
openaire   +1 more source

Efficient Aerodynamic Optimization of Aircraft Wings

2018
Multidisciplinary design and optimization is a promising methodology for the efficient design of complex systems, in particular when it combines coupled analyses with gradient-based optimization techniques. In this case, it requires the derivatives evaluation of the functions of interest with respect to the design variables, which is the most demanding
Pedro M. V. Rodrigues, André C. Marta
openaire   +1 more source

Improving the efficiency of aerodynamic shape optimization

AIAA Journal, 1994
The paper demonstrates two new improvements for the design procedure that increase the computational efficiency of an aerodynamic shape optimization procedure. The numerical procedure is based on discrete sensitivity analysis to compute the design gradient information as opposed to the traditional finite difference approach.
Burgreen, Greg W., Baysal, Oktay, Eleshaky, Mohamed E.   +2 more
openaire   +1 more source

Estimating the Efficiency of an Aerodynamic Foam Breaker

Theoretical Foundations of Chemical Engineering, 2001
An expression for the jet outflow velocity (dynamic characteristic of the foam breaker) and the related effective diameter of a destructurized foam bubble is derived from the energy balance in the interaction of the gas jet and foam structure. An analysis of the jet outflow hydrodynamics gives an expression for the volumetric injection rate as a ...
openaire   +1 more source

Aerodynamics and Other Efficiencies in Transporting Goods

2004
Recognizing both the pollution effects of fuel use and the likely increases of fuel cost in coming decades puts high priority on alternative energy for trucks, buses and trains. There are still gains available in decreasing aerodynamic drag and rolling friction, using efficient engines, and minimizing fuel waste, but it is appropriate to explore ...
openaire   +1 more source

An Efficient Method for Aerodynamic Shape Optimization

10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2004
We present simultaneous pseudo-timestepping as an efficient method for aerodynamic shape optimization. In this method, instead of solving the necessary optimality conditions by iterative techniques, pseudo-time embedded nonstationary system is integrated in time until a steady state is reached. The main advantages of this method are that it requires no
openaire   +1 more source

Impact of Active Aerodynamic Components on Aerodynamic Efficiency under Varying Conditions

American Journal of Student Research
Global carbon emissions are at an all-time high in part due to gas vehicles. While efforts to switch to more fuel efficient and electric vehicles are prevalent, these efforts are slow. Simple measures to reduce aerodynamic drag through active aerodynamics would increase each individual vehicle’s efficiency, reducing emissions.
openaire   +1 more source