Results 81 to 90 of about 16,009 (301)

Covalent Organic Frameworks for Photocatalytic Hydrogen Peroxide Evolution

open access: yesChemistry – A European Journal, Volume 31, Issue 15, March 12, 2025.
Τhis Review presents a comprehensive overview of the very recent developments on COF‐based photocatalysts for H2O2 evolution. First, neat COFs with variable architecture are critically explored, followed by the presentation of the most promising hybrid COF‐based heterojunctions.
Andreas Katsamitros   +4 more
wiley   +1 more source

Autophage engines: towards a throttleable solid motor [PDF]

open access: yes, 2018
This paper describes the instrumented test firing of a rocket that seeks to combine the throttleability of a liquid-fueled engine with the simplicity of a solid motor.
Dron, Mykola   +5 more
core   +1 more source

Development Status of the L75: A Brazilian Liquid Propellant Rocket Engine

open access: yesJournal of Aerospace Technology and Management, 2014
This paper provides an overview of the design and development process of the L75 Liquid Propellant Rocket Engine (LPRE). Being developed at Institute of Aeronautics and Space (IAE), it is the first Brazilian open-cycle liquid rocket engine pressurized by
Daniel Soares de Almeida   +1 more
doaj  

Model Rocket Project for Aerospace Engineering Course: Trajectory Simulation and Propellant Analysis [PDF]

open access: yesarXiv, 2017
Model rockets have been employed in student projects, but very few papers in aerospace education offer concise summaries of activities at university-course levels. This paper aims to address this gap in the literature. The rockets used by our students reached some 500 m (~1,640 feet) in altitude, deployed a parachute, and spent 2-3 minutes descending ...
arxiv  

Cooling process of liquid propellant rocket by means of kerosene-alumina nanofluid

open access: yesPropulsion and Power Research, 2016
Heat transfer augmentation of kerosene-alumina nanofluid is studied for the possible use in the regenerative cooling channel of semi cryogenic engine.
Mostafa Mahmoodi, Sh. Kandelousi
doaj   +1 more source

Integrated design optimization of structural bending filter and gain schedules for rocket attitude control system [PDF]

open access: yesarXiv, 2018
This paper proposes an integrated design optimization framework for the gain schedules and bending filter for the longitudinal control of a rocket during its ascent flight. Dynamic models representing the pitch/yaw motion of a rocket considering the elements such as the rigid body dynamics, aerodynamics, sloshing, bending, sensor/actuator, and flight ...
arxiv  

Energetic Compositions Application for the Reduction of the Environmental Pollution Because of Space Vehicle Launches

open access: yesEurasian Chemico-Technological Journal, 2017
Technogeneous impact of rocket and space activities on the environment is one of the most actual problems of practical cosmonautics. This technogeneous impact is not only the pollution of near Earth space with space debris (worked-off stages of space ...
V. Trushlyakov   +2 more
doaj   +1 more source

The alleged contributions of Pedro E. Paulet to liquid-propellant rocketry [PDF]

open access: yes
The first practical working liquid propellant rocket motor was claimed by Pedro E. Paulet, a South American engineer from Peru (1895). He operated a conical motor, 10 centimeters in diameter, using nitrogen peroxide and gasoline as propellants and ...
Ordway, F. I., III
core   +1 more source

Servo-Stabilization of Low-Frequency Oscillations in a Liquid Bipropellant Rocket Motor [PDF]

open access: yes, 1953
The recent work of H. S. Tsien concerning the servostabilization of rocket motors is extended to the liquid bipropellant rocket motor. It is shown that by use of a feedback system containing a device to sense the combustion chamber pressure, a suitably ...
Cox, Dale W., Jr., Marble, Frank E.
core   +1 more source

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