Results 91 to 100 of about 343,611 (255)

A novel aerodynamic drag-reduction mechanism using dolphin-inspired ultrasonic microvibrations

Scientific Reports
Aerodynamic drag, particularly viscous drag, is a significant source of energy loss in aircraft, with its reduction being critical for improving overall aerodynamic performance.
Dongyue Wang, Hao Liu
doaj   +1 more source

Aerodynamic drag in cycling team time trials

Journal of Wind Engineering and Industrial Aerodynamics, 2018
In a team time trial (TTT), the main strategy is based on drafting, where team members alternately take the lead while others ride behind the leading cyclist. TTTs can contain up to 9 riders of the same team.
B. Blocken, Y. Toparlar, T. V. Druenen, T. Andrianne   +3 more
semanticscholar   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Aerodynamic Performance Assessment of Multiple Car Body Configurations: A Comparative Study

Modelling
This study presents a comparative computational fluid dynamics (CFD) investigation of the aerodynamic performance of four simplified crossover/sports utility vehicle (SUV)-type vehicle body configurations.
Clayton Valenko Fernandes, Padmaraj N H, Thara Reshma I V, Chethan K N, Divya D Shetty, Laxmikant G Keni   +5 more
doaj   +1 more source

Aerodynamic drag in competitive tandem para-cycling: Road race versus time-trial positions

Journal of Wind Engineering and Industrial Aerodynamics, 2018
An athlete's riding posture is a key element for aerodynamic drag in cycling. Tandem cycling has the complication of having two athletes in close proximity to each other on a single tandem bicycle.
P. Mannion, Y. Toparlar, B. Blocken, E. Clifford, T. Andrianne, M. Hajdukiewicz   +5 more
semanticscholar   +1 more source

Strong‐Magnetic Flexible Composites for Magnetically Responsive Soft Robots

Advanced Robotics Research, EarlyView.
This perspective provides an overview of the performance mechanisms, preparation methods, and applications of strong magnetic flexible composite materials in soft actuators (such as gripping, movement, and sensing), and further explores current opportunities and challenges.
Wenwen Li, Shuai Liu, Xinyi Wang, Xinglong Gong, Shouhu Xuan   +4 more
wiley   +1 more source

CFD analysis of aerodynamic correlation mechanism in ski jumping takeoff-flight

Kongqi donglixue xuebao
While previous studies have extensively examined how takeoff and flight techniques affect performance (e.g., jump distance) from a kinematic perspective, few have focused on aerodynamic dynamics, nor the intrinsic relationship between these two phases ...
Jinglun Yu, Jinglun Yu, Jin Yang, Shuo Qi, Shengnian Zhang, Yantao Lou   +5 more
doaj   +1 more source

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Aerodynamic Drag and Gyroscopic Stability

, 2013
This paper describes the effects on aerodynamic drag of rifle bullets as the gyroscopic stability is lowered from 1.3 to 1.0. It is well known that a bullet can tumble for stability less than 1.0. The Sierra Loading Manuals (4th and 5th Editions) have previously reported that ballistic coefficient decreases significantly as gyroscopic stability, Sg, is
Courtney, Elya R., Courtney, Michael W.
openaire   +2 more sources