Results 211 to 220 of about 12,726 (261)

The efficiency of aerodynamic force production in Drosophila

Comparative Biochemistry and Physiology Part A, Molecular & Integrative Physiology, 2001
Total efficiency of aerodynamic force production in insect flight depends on both the efficiency with which flight muscles turn metabolic energy into muscle mechanical power and the efficiency with which this power is converted into aerodynamic flight force by the flapping wings.
Fritz-Olaf Lehmann
exaly   +3 more sources

Aerodynamic efficiency of wings in rain

Journal of Aircraft, 1996
Measurements of lift, drag, and moment coefficients were obtained for a rectangular planform wing with wettable and nonwettable surface coatings in light to moderate rain. Comparisons with surfacewater flow patterns show that the degradation of aerodynamic efficiency caused by rain depended on the location of rivulet formation and on the diameter of ...
Brian E. Thompson, Juneho Jang
exaly   +2 more sources

Is Flapping Flight Aerodynamically Efficient?

32nd AIAA Applied Aerodynamics Conference, 2014
Flapping flight is much less efficient for some insects than previously thought. The induced power factor for flapping wings is discussed in terms of a number of non-ideal effects for hovering and for forward flight. These effects include losses due to non-uniform downwash, wake periodicity and effective disk area.
Nabawy, M.R.A., Crowther, W.J.; id_orcid 0000-0002-0613-9375   +1 more
openaire   +1 more source

Efficient optimization of integrated aerodynamic–structural design

International Journal for Numerical Methods in Engineering, 1989
AbstractThe introduction of composite materials is having a profound effect on the design process. Because these materials permit the designer to tailor material properties to improve structural, aerodynamic and acoustic performance, they require a more integrated multidisciplinary design process.
Haftka, R. T., Grossman, B., Eppard, W. M., Kao, P. J., Polen, D. M.   +4 more
openaire   +2 more sources

Efficient Newton-Krylov Solver for Aerodynamic Computations

AIAA Journal, 1998
An efficient inexact Newton-Krylov algorithm is presented for the computation of steady two-dimensional aerodynamic flows. The algorithm uses the preconditioned, restarted generalized minimal residual method in matrix-free form to solve the linear system arising at each Newton iteration.
Alberto Pueyo, David W. Zingg
openaire   +1 more source

Vocal Efficiency and Aerodynamic Aspects in Voice Disorders

Annals of Otology, Rhinology & Laryngology, 1985
The variation of vocal efficiency for the mean values for normal subjects was investigated in patients with laryngeal disease. The relative contributions of mean flow rate and intrapulmonic pressure to the variation of efficiency were explored to explain aerodynamic aspects in voice disorders.
S, Tanaka, W J, Gould
openaire   +2 more sources

Energy cost and efficiency of riding aerodynamic bicycles

European Journal of Applied Physiology and Occupational Physiology, 1993
Traction resistance (Rt) was determined by towing two cyclists in fully dropped posture on bicycles with an aerodynamic frame with lenticular wheels (AL), an aerodynamic frame with traditional wheels (AT), or a traditional frame with lenticular wheels (TL) in calm air on a flat wooden track at constant speed (8.6-14.6 m.s-1).
FERRETTI, Guido, ROSA G, BUTTI F, FERRETTI G, VEICSTEINAS A, DI PRAMPERO PE   +5 more
openaire   +5 more sources

Development of an efficient aerodynamic shape optimization framework

Mathematics and Computers in Simulation, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jong-Eun Kim, Vinay N. Rao, Roy P. Koomullil, Douglas H. Ross, Bharat K. Soni, Alan M. Shih   +5 more
openaire   +2 more sources

Time-Efficient Hardware-in-the-Loop Aerodynamic Optimization [PDF]

Journal of Aerospace Engineering
A hardware-in-the-loop system was created for the purpose of aerodynamic optimization. The system was used for fully independent optimization of an automotive diffuser model in a wind tunnel, with linear actuators used to modify the geometry. The model had three degrees of freedom with 7×105 possible configurations.
Pawel Kekus-Kumor, David Angland
openaire   +1 more source

The Aerodynamic Efficiency of Windmills

Aeronautical Quarterly, 1978
SummaryThe paper reproduces the results of an earlier report on the vortex theory of windmills and follows that theory through to establish the aerodynamic design procedure for a horizontal axis windmill. The results are shown to differ considerably from those given in a recent paper by Griffith and the differences are explained. The main conclusion is
openaire   +1 more source