Results 91 to 100 of about 43,130 (185)

High Reynolds number tests of a Douglas DLBA 032 airfoil in the Langley 0.3-meter transonic cryogenic tunnel [PDF]

A wind-tunnel investigation of a Douglas advanced-technology airfoil was conducted in the Langley 0.3-Meter Transonic Cryogenic Tunnel (0.3-m TCT). The temperature was varied from 227 K (409 R) to 100 K (180 R) at pressures ranging from about 159 kPa (1 ...
Bui, Minh H., Dress, David A., Hill, Acquilla S., Johnson, Charles B., Wilcox, Peter A.   +4 more
core   +1 more source

Calculation and uncertainty analysis method for airfoil drag coefficient considering compressibility

AIP Advances
In order to meet the need of evaluating the effectiveness of airfoil drag reduction design, the calculation and uncertainty analysis method for airfoil drag coefficient considering compressibility is studied.
Yufeng Du, Qiuting Guo, Lulu Wang, Jilong Zhu, Neng Xiong   +4 more
doaj   +1 more source

Optimization of High‑Speed WIG Airfoil with Consideration of Non‑ground Effect by a Two‑Step Deep Learning Inverse Design Method

Transactions of Nanjing University of Aeronautics and Astronautics
Under complex flight conditions， such as obstacle avoidance and extreme sea state， wing-in-ground （WIG） effect aircraft need to ascend to higher altitudes， resulting in the disappearance of the ground effect.
WANG Chenlu, SUN Jianhong, ZHENG Daren, SUN Zhi, ZUO Si, LIU Hao, LI Pei   +6 more
doaj   +1 more source

Langley airfoil-research program [PDF]

An overview of past, present, and future airfoil research activities at the Langley Research Center is given. The immediate past and future occupy most of the discussion; however, past accomplishments and milestones going back to the early NACA years are
Bobbitt, P. J.
core   +1 more source

Study of the development and verification of an integrated code for UAV design [PDF]

, 2015
L'objectiu d'aquest estudi és desenvolupar una eina de disseny d'aeronaus utilitzant algoritmes d'optimització per a facilitar el procés. Es pretén incorporar el codi d'estudi i simulació de les actuacions d'un UAV desenvolupat per l'equip Trencalòs Team
Armengol Garcia, Lluís
core  

Results of LFC experiment on slotted swept supercritical airfoil in Langley's 8-foot transonic pressure tunnel [PDF]

A large chord swept supercritical laminar-flow control (LFC) airfoil was designed, constructed, and tested in the Langley 8-foot Transonic Pressure Tunnel (TPT).
Brooks, Cuyler W., Jr., Harris, Charles D.   +1 more
core   +1 more source

The natural flow wing-design concept [PDF]

A wing-design study was conducted on a 65 degree swept leading-edge delta wing in which the wing geometry was modified to take advantage of the naturally occurring flow that forms over a slender wing in a supersonic flow field.
Bauer, Steven X. S., Wood, Richard M.
core   +1 more source

Cluster-based feedback control of turbulent post-stall separated flows

, 2018
We propose a novel model-free self-learning cluster-based control strategy for general nonlinear feedback flow control technique, benchmarked for high-fidelity simulations of post-stall separated flows over an airfoil. The present approach partitions the
Brunton, Steven L., Kaiser, Eurika, Nair, Aditya G., Noack, Bernd R., Taira, Kunihiko, Yeh, Chi-An   +5 more
core   +1 more source

Inverse transonic airfoil design methods including boundary layer and viscous interaction effects [PDF]

The results are reported of the research on the viscous interactions effects on transonic airfoil design and analysis.
Carlson, L. A.
core   +1 more source

Robust Conceptual Design of Transonic Airfoils [PDF]

This paper describes an integrated, multi-fidelity analysis and heuristic design approach that can be used to derive initial airfoil designs for transonic flight.
Olson, Erik D.
core   +1 more source