high angle-of-attack flight
On the calculation of dynamic derivatives using computational fluid dynamics
... low angle of attack, the static derivatives are generally sufficient to model the aerodynamic loads ...of attack and rates, the inclusion of dynamic derivatives in the aerodynamic model can have a ...
213
Dragonfly flight: free flight and tethered flow visualizations reveal a diverse array of unsteady lift generating mechanisms, controlled primarily via angle of attack
... tethered flight, but only once in free flight (during a climb, where the flow over the forewing appears mildly stalled on a single downtroke; penultimate frame of video S2 in supplementary ...the ...
25
Variable Cant Angle Winglets for Improvement of Aircraft Flight Performance
... and high velocities and low pressure exist at their ...the angle-of-attack that each section of the wing e ff ectively sees, and it creates a component of drag, the lift-induced drag, as it will be ...
32
Stability Characteristics of missile due to maneuvering in all six Degree of freedom using CFD simulations
... the flight-direction of the missile. The angle of attack (AOA) of the control surface is altered whenever there is a need for change of ...A high value of AOA will lead to huge turbulences ...
9
Diving-flight aerodynamics of a peregrine falcon (Falco peregrinus)
... actual angle of attack during a nose-dive at maximum ...3-D flight path trajectory of a diving peregrine was recorded; a high-resolution camera simultaneously captured images of the body and ...
14
Linear Parameter-Varying Control of an F-16 Aircraft at High Angle of Attack
... The LPV antiwindup control scheme was applied to the F-16 longitudinal model without thrust vectoring augmentation. The flight envelope was chosen at high angles of attack, and the aerodynamic ...
145
Validation of the aerodynamic loading on basic flying disc geometries derived from CFD simulations
... for high facility or time ...low angle of attack range, however, at higher angles of attack the CFD curves are ...at high angles of attack, note that for sports disc applications ...
7
Computational study on the influence of dynamic stall on the unsteady aerodynamics of flapping wing ornithopter
... practical flight conditions should be accounted for the realistic application of the aerodynamic ...a high relative angle of attack if the plunging velocity h is increased or the free stream ...
8
Passive maintenance of high angle of attack and its lift generation during flapping translation in crane fly wing
... fly flight and our model flight, our model wing passively maintained a high angle of attack during the flapping translation and rotated quickly upon the stroke reversal without any ...
10
Direct numerical simulation of an aerofoil at high angle of attack and its control
... at high angle of attack and is re- sponsible of a dramatic decrease in their aerodynamic performance ...the angle of attack fixed beyond a certain value (static stall), or by increasing ...
111
A syntax of hoverfly flight prototypes
... a flight trajectory and to determine the temporal sequence of ...different flight arenas stayed similar as ...larger flight arenas than were used in this study will allow the animal to attain higher ...
15
Robust PID Controller Design for a Modern Type Aircraft Including Handling Quality Evaluation
... extended flight envelope and not necessarily as a result of an aerodynamic design ...The flight control system (FCS) includes two feedback loops both of which derive their control signals from motion ...
7
Performance Prediction and Dynamic Model Analysis of Vertical Axis Wind Turbine Blades with Aerodynamically Varied Blade Pitch.
... A dynamic model for an H-type Darrieus rotor concept with free-pitching blades having actuated trailing edge flaps was developed with the objective of improving performance compared to a rotor of similar geometry and ...
112
The effect of angle of attack on the generated wave propagation
... produced high quality waves, the measured wave heights from WP1, WP2 and WP3 are plotted with respect to lateral distances in Figures 9 to ...an angle of attack of 4° (AoA 4) produced the best ...
6
Kinematics analysis of selected rhytmic gymnastic leaps
... experienced high level (national competition) rhythmic gymnast athlete (16yo, 175 cm height, 50 kg weight) were analyzed in order to provide firsts descriptive data of these movements, to compare different ...
8
ANALYSIS OF AERODYNAMIC PERFORMANCE OF NREL S833 USING CFD SIMULATION
... "Fig. 6" represents the relation between, ratio of lift to drag coefficient and angles of attacks. Higher value of lift to drag coefficient ratio with angle of attack, then that angle is ...
8
Three dimensional kinematics of hummingbird flight
... forward flight (Altshuler and Dudley, ...vary flight velocity primarily by changing the angle of their body relative to horizontal (  ), thereby effecting a change in stroke-plane angle, as ...
15
Biofluiddynamic scaling of flapping, spinning and translating fins and wings
... generate high lift with its wing at angles of attack at which helicopter blades and airplane wings ...extraordinary high lift like wind turbines and propellers (Himmelskamp, 1947) do near their ...
14
Comparison of the emissions of current expendable launch vehicles and future spaceplanes
... They high- light that launch vehicles are unique because they are the only source of anthropogenic chemical injec- tion into the upper atmosphere, and in particular the lower stratosphere which is host to the ...
12
Vortex wake interactions of a flapping foil that models animal swimming and flight
... For all experiments we started at zero flapping frequency, which we subsequently increased monotonically to obtain the desired dimensionless wavelength. In this way we avoided hysteresis loops. Similar to earlier ...
7