Results 21 to 30 of about 2,387,085 (259)

COUNTERING HYPERSONIC THREAT

open access: yesBulletin of "Carol I" National Defense University, 2022
Hypersonic missiles represent the new class of threats, capable declaratively and in a way that has not been proven in a theater of operations, to annihilate air and anti-missile defences that exist at this time.
Cătălin CHIRIAC
doaj   +1 more source

Analysis of Hypersonic Platform-Borne SAR Imaging: A Physical Perspective

open access: yesRemote Sensing, 2021
The usage of a hypersonic platform for remote sensing application has promising prospects, especially for hypersonic platform-borne synthetic aperture radar (SAR) imaging.
Lihao Song   +6 more
doaj   +1 more source

Advantages and Challenges of Air-to-Air Missile Hypersonic Defense [PDF]

open access: yesHangkong bingqi, 2022
The change of war mode has led to the emergence of new threat targets. In recent years, with the development of technologies, air-space hypersonic flight technology continues to mature and form equipment.
Guo Zhengyu, Dong Meng, Du Miaomiao
doaj   +1 more source

Influence Analysis of Simulation Parameters on Numerical Prediction of Compressible External Flow Field Based on NACA0012 Airfoil under Hypersonic Speed

open access: yesApplied Sciences, 2022
Currently, the influence of numerical parameters on the prediction accuracy of the compressible external flow field characterized by a NACA0012 airfoil under hypersonic speed, especially the influence analyses of the trailing edge shape, the modeling ...
Lu Yang, Guangming Zhang
doaj   +1 more source

High-enthalpy hypersonic flows

open access: yesAdvances in Aerodynamics, 2020
Nearly all illuminating classic hypersonic flow theories address aerodynamic phenomena as a perfect gas in the high-speed range and at the upper limit of continuum gas domain.
Joseph J. S. Shang, Hong Yan
doaj   +1 more source

Nonlinear Predictive Control with Sliding Mode for Hypersonic Vehicle

open access: yesInternational Journal of Aerospace Engineering, 2023
Hypersonic vehicles are difficult to control due to their rapid time variation, dynamic nonlinearity, strong coupling, and model uncertainty. This paper proposes a new nonlinear predictive controller to solve the problem.
Xiande Wu   +4 more
doaj   +1 more source

Analysis of a combined cycle propulsion system for STRATOFLY hypersonic vehicle over an extended trajectory [PDF]

open access: yesMATEC Web of Conferences, 2019
Hypersonic civil aviation is an important enabler for extremely shorter flight durations for long-haul routes and using unexploited flight altitudes. Combined cycle engine concepts providing extended flight capabilities, i.e. propelling the aircraft from
Ispir Ali Can   +2 more
doaj   +1 more source

Shock Wave Intelligent Prediction Method for Hypersonic Vehicle

open access: yes气体物理, 2023
Accurate prediction of shock wave position of hypersonic aircrafts can effectively improve the accuracy and efficiency of computational fluid dynamics (CFD) simulation.
Yuan-hao ZHU   +6 more
doaj   +1 more source

Study on Oil-Film Interferometry Measurement Technique of Hypersonic Boundary Layer Transition [PDF]

open access: yesXibei Gongye Daxue Xuebao, 2018
Prediction of boundary layer transition is important for the design of hypersonic aircrafts. The study of boundary layer transition of hypersonic flow around a flat plate using oil-film interferometry was investigated at Φ500mm traditional hypersonic ...

doaj   +1 more source

A terahertz signal propagation model in hypersonic plasma sheath with different flight speed

open access: yesPhysics of Plasmas, 2019
A hypersonic plasma sheath could shield communication signals, which results in the so-called “blackout.” Hypersonic flights in near space used to suffer from the “blackout.” Terahertz (THz) communication is considered to be a potential solution to the ...
R. Tang   +5 more
semanticscholar   +1 more source

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