Results 31 to 40 of about 10,850 (227)
Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen
Aerospace, 2022 This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi +5 more
doaj +1 more source
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
Apparatus and method for generating large mass flow of high temperature air at hypersonic speeds [PDF]
, 1973 High temperature, high mass air flow and a high Reynolds number test air flow in the Mach number 8-10 regime of adequate test flow duration is attained by pressurizing a ceramic-lined storage tank with air to a pressure of about 100 to 200 atmospheres ...
Sabol, A. P., Stewart, R. B.
core +4 more sources
Numerical investigation of strut-dual cavity flame holders for enhanced combustion performance in scramjet engines [PDF]
FME TransactionsScramjet engines hold significant promise for hypersonic propulsion, yet the complexities of supersonic combustion pose considerable challenges. Computational Fluid Dynamics (CFD) offers a cost-effective approach to studying turbulent reactive flows in ...
Choubey Gautam +2 more
doaj +1 more source
The Unintended Consequences of German Deterrence
Global Policy, EarlyView.ABSTRACT Germany's evolving deterrence posture boils down to continued participation in NATO nuclear sharing and an ambitious conventional rearmament program. Due to its non‐nuclear status and a result of decades of underinvestment, Germany prioritizes modern conventional weapons.
Ulrich Kühn
wiley +1 more source
Engineering Reports, Volume 8, Issue 5, May 2026.A numerical investigation using 3D RANS simulations demonstrates significant effects of protuberance geometry—cubic, cylindrical, spherical, and conical—on shock‐induced thrust vectoring in supersonic nozzles. Cubic protuberances provide the maximum jet deflection (˜2°) with negligible thrust reduction.
Mohammadreza Soufivand +3 more
wiley +1 more source
Numerical simulation and performances evaluation of the pulse detonation engine
MATEC Web of Conferences, 2018 A pulse detonation engine (PDE) is a type of propulsion system that uses detonation waves to combust the fuel and oxidizer mixture. The engine is pulsed because the mixture must be renewed in the combustor between each detonation wave.
Prisacariu Vasile +3 more
doaj +1 more source
Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle
IEEE Access, 2019 In the design of hypersonic cruise vehicles, great effort is demanded to improve the performances of subsystems, namely structure, aerodynamics, and propulsion.
Wenkai Wang +3 more
doaj +1 more source
Aerospace, 2023 This paper introduces the concept of a thermal management system (TMS) with integrated on-board power generation capabilities for a Mach 8 hypersonic aircraft powered by liquid hydrogen (LH2).
Davide Ferretto, Nicole Viola
doaj +1 more source
Radiative Forcing and Ozone Depletion of a Decade of Satellite Megaconstellation Missions
Earth's Future, Volume 14, Issue 5, May 2026.Abstract Satellite megaconstellations (SMCs) are driving rapid increases in rocket launch and re‐entry rates, emitting pollutants throughout the atmosphere. The environmental impact of SMCs lacks characterization to determine the need for regulation. We utilize a global 3D emission inventory of recent (2020–2022) space activity that distinguishes SMC ...
Connor R. Barker +12 more
wiley +1 more source