Results 41 to 50 of about 16,009 (301)

Hybrid rocket propulsion technology for space transportation revisited - propellant solutions and challenges

open access: yesFirePhysChem, 2021
This paper presents the status of developments worldwide regarding use of hybrid rocket motors for space transportation. Historical roots are presented and reasons for revisiting hybrid technology after a few decades of limited interest are examined ...
Adam Okninski   +3 more
doaj  

Influence of surface roughness on the heat transfer coefficient of fluids in an additively manufactured supercharger

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2022
The supercharger is intended for heating a fluid (gaseous helium or gaseous nitrogen) used for the pressurization of fuel tanks of oxidizer and propellant of a rocket engine. The fluid is heated with the generator gas downstream the turbine.
A. S. Smekalkin, A. V. Ivanov
doaj   +1 more source

Comparison of Optimization Techniques and Objective Functions Using Gas Generator and Staged Combustion LPRE Cycles

open access: yesApplied Sciences, 2022
This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion
Suniya Sadullah Khan   +5 more
doaj   +1 more source

Realizing Stabilized Landing for Computation-Limited Reusable Rockets: A Quantum Reinforcement Learning Approach [PDF]

open access: yesarXiv, 2023
The advent of reusable rockets has heralded a new era in space exploration, reducing the costs of launching satellites by a significant factor. Traditional rockets were disposable, but the design of reusable rockets for repeated use has revolutionized the financial dynamics of space missions.
arxiv  

Photon rockets and gravitational radiation [PDF]

open access: yesClass.Quant.Grav.12:725-738,1995, 1994
The absence of gravitational radiation in Kinnersley's ``photon rocket'' solution of Einstein's equations is clarified by studying the mathematically well-defined problem of point-like photon rockets in Minkowski space (i.e. massive particles emitting null fluid anisotro\-pically and accelerating because of the recoil).
arxiv   +1 more source

Attitude and propellant flow control system and method Patent [PDF]

open access: yes, 1962
Attitude and propellant flow control system for liquid propellant rocket ...
Escher, W. J. D.
core   +1 more source

Shape of Big Rockets [PDF]

open access: yesarXiv, 2020
Recent publications discuss the size of chemical rockets for long-distance travel, to be launched from a planet. Here I point out that such a rocket cannot be tall and slim but will be short and fat.
arxiv  

Dataset of the experimentally measured heat transfer in the throat region of liquid rocket engine thrust chambers

open access: yesData in Brief, 2021
About 500 experimental heat transfer data taken from the open literature and relevant to the most thermally solicited area (i.e., the throat region) of liquid rocket engine thrust chambers, are collected and manipulated. This collection is the outcome of
Marco Pizzarelli
doaj  

Photon rockets moving arbitrarily in any dimension [PDF]

open access: yesInt.J.Mod.Phys.D20:335-360,2011, 2010
A family of explicit exact solutions of Einstein's equations in four and higher dimensions is studied which describes photon rockets accelerating due to an anisotropic emission of photons. It is possible to prescribe an arbitrary motion, so that the acceleration of the rocket need not be uniform - both its magnitude and direction may vary with time ...
arxiv   +1 more source

High temperature spark plug Patent [PDF]

open access: yes, 1966
High temperature spark plug for igniting liquid rocket ...
Watson, J. E.
core   +1 more source

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