Results 21 to 30 of about 39,906 (229)

Fuzzy Optimal Tracking Control of Hypersonic Flight Vehicles via Single-Network Adaptive Critic Design

open access: yesIEEE transactions on fuzzy systems, 2022
Optimal performance is extremely important for hypersonic flight control. Different from most existing methodologies, which only consider basic control performance including stability, robustness, and transient performance, this article deals with the ...
Xiangwei Bu, Qiang Qi
semanticscholar   +1 more source

Study on the application of artificial neural network-based flamelet/progress variable model in supersonic combustion

open access: yesAIP Advances, 2023
The flamelet model has the characteristics of high efficiency and physical intuition and has excellent application prospects in supersonic turbulent combustion simulation.
Chengyue Lian   +6 more
doaj   +1 more source

Research on Development of Hypersonic Defense Weapons Abroad [PDF]

open access: yesHangkong bingqi, 2023
The US pays great attention to and leads the development of hypersonic weapon defense technology in the world, vigorously promots hypersonic defense programs such as Hypersonic Defense Weapon Concept Definition, Hypersonic Defense Component Technology ...
Zhao Hongyan, Xie Bangrong
doaj   +1 more source

Research on Hypersonic Vehicle Interception Conditions from a Small Velocity Ratio Perspective [PDF]

open access: yesHangkong bingqi, 2023
To address the problem of hypersonic vehicle interception, taking the air-breathing hypersonic vehicle as the target of interception, this paper employs the concept of engagement geometry to theoretically provide the necessary conditions for the ...
Liu Shuangxi, Yan Binbin, Zhang Tong, Zhang Xu, Yan Jie
doaj   +1 more source

Large eddy simulation of supersonic flow in ducts with complex cross-sections

open access: yesTheoretical and Applied Mechanics Letters, 2023
Large Eddy Simulation (LES) has been employed for the investigation of supersonic flow characteristics in five ducts with varying cross-sectional geometries.
Huifeng Chen   +5 more
doaj   +1 more source

Stabilized detonation for hypersonic propulsion

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2021
Significance There is now an intensifying international effort to develop robust propulsion systems for hypersonic and supersonic flight. Such a system would allow flight through our atmosphere at very high speeds and allow efficient entry and exit from ...
D. Rosato   +5 more
semanticscholar   +1 more source

Hypersonic Phononic Crystals [PDF]

open access: yesPhysical Review Letters, 2005
In this Letter we propose the use of hypersonic phononic crystals to control the emission and propagation of high frequency phonons. We report the fabrication of high quality, single crystalline hypersonic crystals using interference lithography and show that direct measurement of their phononic band structure is possible with Brillouin light ...
Gorishnyy, T.   +4 more
openaire   +3 more sources

Supersonic and Hypersonic Drag Coefficients for a Sphere

open access: yesAIAA Journal, 2021
A comprehensive review of all relevant experimental data was completed, including recent data for the drag coefficient for a sphere in supersonic and hypersonic flows.
E. Loth   +4 more
semanticscholar   +1 more source

Hypersonic Modes in Nanophononic Semiconductors [PDF]

open access: yesPhysical Review Letters, 2008
Frequency gaps and negative group velocities of hypersonic phonon modes in periodically arranged composite semiconductors are presented. Trends and criteria for phononic gaps are discussed using a variety of atomic-level theoretical approaches. From our calculations, the possibility of achieving semiconductor-based one-dimensional phononic structures ...
Hepplestone, SP, Srivastava, GP
openaire   +3 more sources

Research Progress of hypersonic boundary layer transition control experiments

open access: yesAdvances in Aerodynamics, 2022
Hypersonic boundary layer transition is a hot yet challenging problem restricting the development and breakthrough of hypersonic aerodynamics. In recent years, despite great progress made by wind tunnel experiment, transition mechanism and transition ...
He-sen Yang   +6 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy