Results 81 to 90 of about 461 (188)

Low-temperature tribological properties of Si3N4 ceramic composites incorporating nano/microscale graphene and Si3N4 whisker

Journal of Materials Research and Technology
Si3N4 ceramic bearings have demonstrated significant potential in augmenting the performance of liquid rockets. However, the operational conditions, including reciprocating use, ultra-high-speeds, and high-load impacts, impose more stringent requirements
Fei Chen, Xiaobo Sun, Bin Fang, Ke Yan, Bei Yan   +4 more
doaj   +1 more source

HYBRID ROCKET ENGINE TEST FACILITY DESIGN

Havacılık ve Uzay Teknolojileri Dergisi, 2016
Hybrid rocket engines is relatively less researched subject of chemical rockets. Using fuel and oxidizer in different phases hybrids are safe and cheap. Yet, they are not generating enogh thrust to deliver heavy payloads to edge of space.
Ali Emre Samur, Abdurrahman Hacıoğlu, Arif Karabeyoğlu   +2 more
doaj  

Design of cascaded FOPI-FOPD-BLQG controller tuned with hybrid grasshopper and firefly algorithms for stabilizing cart-inverted pendulum system

Mechanics & Industry
The Cart Inverted Pendulum (CIP) system is a widely studied problem in control theory due to its inherent instability and nonlinearity dynamics, which closely mimic various real-time applications, including segways, robotics, rockets, and missile guiding
Verma Neelam, Valluru Sudarshan K.
doaj   +1 more source

Screening of metal additives in ABS polymer fuel for enhanced performance in hybrid rocket motors: A computational analysis using CEA

Defence Technology
This study investigates the potential of metal additives in acrylonitrile butadiene styrene (ABS) polymer fuel to enhance hybrid rocket motor (HRM) performance through computational analysis, Chemical Equilibrium with Applications (CEA), software.
Gail Ndlovu, Bilainu Oboirien, Patrick Ndungu   +2 more
doaj   +1 more source

Fuel Ignition in HTP Hybrid Rockets at Very Low Mass Fluxes: Challenges and Pulsed Preheating Techniques Using Palladium-Coated Catalysts

Aerospace
In a worldwide scenario which sees an increasing number of small satellite launches, novel mission concepts may be unlocked providing the spacecrafts with the very precise and rapid maneuvering capability that electric thrusters cannot guarantee. In this
Sergio Cassese, Stefano Mungiguerra, Veniero Marco Capone, Riccardo Guida, Anselmo Cecere, Raffaele Savino   +5 more
doaj   +1 more source

Comment on Albantakis et al. Computing the Integrated Information of a Quantum Mechanism. Entropy 2023, 25, 449. [PDF]

Entropy (Basel), 2023
Rourk C.
europepmc   +1 more source

Impact of Rocket Launch and Space Debris Air Pollutant Emissions on Stratospheric Ozone and Global Climate. [PDF]

Earths Future, 2022
Ryan RG, Marais EA, Balhatchet CJ, Eastham SD.   +3 more
europepmc   +1 more source

Dual Sounding Rocket and C/NOFS Satellite Observations of DC Electric Fields and Plasma Density in the Equatorial E- and F-Region Ionosphere at Sunset. [PDF]

J Geophys Res Space Phys, 2022
Pfaff R, Kudeki E, Freudenreich H, Rowland D, Larsen M, Klenzing J.   +5 more
europepmc   +1 more source

An Investigation into Hybrid Rocket Injectors

, 2020
Propulse NTNU er et nylig oppstartet rakettlag for studenter som nå forsøker å bygge en hybrid-rakett. Fordi dette er en ny organisasjon er det et behov for å samle kunnskap om hvordan raketter og deres nøkkelkomponenter fungerer. En av nøkkelkomponentene er injektoren, og dens rolle er å levere en spesifik massestrømningsrate av flytende oksidant som ...
openaire   +1 more source

From the TRICE-2 Investigations to the TRACERS Mission. [PDF]

Space Sci Rev
Trattner KJ, LaBelle J, Santolik O, Kletzing CA, Miles DM, Fuselier SA, Bonnell JW, Bounds SR, Kolmasova I, Petrinec SM, Sawyer RP, Vines SK, Moser-Gauthier C, Cairns IH, Yeoman TK.   +14 more
europepmc   +1 more source