Une hypothèse largement répandue en ingénierie vient d'être contestée. L'idée selon laquelle des surfaces plus lisses produisent systématiquement moins de traînée aérodynamique ne se vérifie pas dans tous les cas.
La traînée aérodynamique constitue un obstacle majeur pour les véhicules conçus pour se déplacer à grande vitesse. Cela s'applique aussi bien aux avions et aux automobiles qu'aux trains à grande vitesse.
Researchers have found a way to alter the direction of energy flow in turbulence, challenging a theory established in 1941. The work, conducted at the University of Pittsburgh with Italian collaborators, was published in Science Advances in 2025.
Rapporté par l'IA
The Chinese Academy of Sciences launched a research programme on Monday to study low-altitude hypersonic flight technology.
Williams team principal James Vowles confirmed that engineering work to reduce the FW48's weight is complete. However cost cap restrictions prevent the team from introducing all fixes at once.
Rapporté par l'IA
Researchers have developed minuscule devices that use light to control movement in multiple directions, advancing the potential for light-powered spacecraft. The metajets, made from silicon, were tested in a lab setting and showed promising results for steering large sails through space. This breakthrough could help overcome current limitations in directing such vessels over vast distances.