Results 71 to 80 of about 31,952 (223)

Friction Shock Absorbers and Reverse Thrust for Fast Multirotor Landing on High‐Speed Vehicles

Journal of Field Robotics, Volume 43, Issue 2, Page 1068-1090, March 2026.
ABSTRACT Typical landing gears of small uninhabited aerial vehicles (UAV) limit their capability to land on vehicles moving at more than 20–50 km/h due to high drag forces, high pitch angles and potentially high relative horizontal velocities. To enable landing at higher speeds, a combination of lightweight friction shock absorbers and reverse thrust ...
Isaac Tunney, John Bass, Alexis Lussier Desbiens   +2 more
wiley   +1 more source

A first-order Green's function approach to supersonic oscillatory flow: A mixed analytic and numeric treatment [PDF]

A frequency domain Green's Function Method for unsteady supersonic potential flow around complex aircraft configurations is presented. The focus is on the supersonic range wherein the linear potential flow assumption is valid.
Freedman, M. I., Sipcic, S., Tseng, K.
core   +1 more source

Virtual Integration Platforms (VIP) –A Concept for Integrated and Interdisciplinary Air Transportation Research and Assessment [PDF]

, 2011
The paper descibes a new methodology for a holistic development of air transportation concepts. The Virtual Integration Plattform (VIP) concept is based on an IT tool chain as well as human collaborative methods to deal with complex systems.
Gollnick, Volker, Lehner, Stephan, Stumpf, Eike, Szodruch, Joachim   +3 more
core   +1 more source

Spatial Variability of Sea State in the German Bight and Influence of Offshore Wind Farms

Wind Energy, Volume 29, Issue 3, March 2026.
ABSTRACT Offshore wind farms are growing worldwide and increase the source of renewable energy. However, as the extent and density of offshore wind farms increase, there is growing importance to understand the interactions with physical systems and the marine environment, in particular, the sea state.
Lea Schmitt, Konrad B. Bärfuss, Xiaoli Guo Larsén, Jana Fischereit, Astrid Lampert   +4 more
wiley   +1 more source

Supersonic aircraft aerodynamic performance prediction based on machine learning approach

AIP Advances
This study proposes a novel approach that integrates machine learning algorithms with computational fluid dynamics (CFD) simulations to efficiently predict the aerodynamic performance of supersonic aircraft under cruising flight conditions.
Qijia Liu, Jiechao Zhang, Yao Zheng, Yaolong Liu   +3 more
doaj   +1 more source

Discrete Adjoint Optimization Method for Low-Boom Aircraft Design Using Equivalent Area Distribution

Aerospace
This paper introduces a low-boom aircraft optimization design method guided by equivalent area distribution, which effectively improves the intuitiveness and refinement of inverse design. A gradient optimization method based on discrete adjoint equations
Chuang Ma, Jiangtao Huang, Daochun Li, Jun Deng, Gang Liu, Lin Zhou, Cheng Chen   +6 more
doaj   +1 more source

Impact of Supersonic Aircraft on Upper Layers of (Atmosphere) Stratosphere

Promet (Zagreb), 2012
Recent scientific research have continued to assume thataircraft may contribute to the adverse chemical changes in theglobal atmosphere, especially regarding ozone (03) depletionas well as in possible changes in climate.Howeve1; there is substantial ...
Jasna Golubić, Ivica Mekovec, Ivan Suić   +2 more
doaj   +1 more source

Compression Pylon [PDF]

, 1989
A compression pylon for an aircraft with a wing-mounted engine, that does not cause supersonic airflow to occur within the fuselage-wing-pylon-nacelle channel is presented.
Patterson, James C., Jr.
core   +1 more source

The Microstructure and High‐temperature Cycle Oxidation Mechanism of the Nickel‐Based Superalloy Surface Treated by Laser Shock Processing and Ion Implantation at 1100 °C

Advanced Materials Interfaces, Volume 13, Issue 3, 3 February 2026.
Laser shock processingcombination with Hf ion implantation results in dual modification on the surface of GH202 nickel‐based superalloy, which induces a large number of crystal defects, providing channels for the diffusion of metal cations. Hf ion implantation forms an amorphous HfO2 layer.
Jiangdong Cao, Feng Ding, Yujie Ma, Xiping Yang, Bochen Jiang, Dong ming Shi, Siyuan Chen, Lang Bai   +7 more
wiley   +1 more source

The YF-12 Gust Velocity Measuring System [PDF]

A true gust velocity measuring system designed to alleviate complications resulting from airframe flexibility and from the high-speed, high-temperature environment of supersonic cruise aircraft was evaluated on a YF-12 airplane.
Ehernberger, J.
core   +1 more source