Results 21 to 30 of about 20,111 (287)
Effect of tangential swirl air inlet angle on the combustion efficiency of a hybrid powder-solid ramjet [PDF]
, 2019 A new ramjet configuration using powder and solid fuel as propellant is investigated, namely, hybrid powder-solid ramjet (HPSR). Boron particles were used as the powder in this study.
ANSYS Inc +49 more
core +1 more source
Design and trade-offs of a pole-sitter mission [PDF]
, 2013 This paper provides a mission analysis and systems design of a pole-sitter mission, i.e. a spacecraft that is continuously above an Earth Pole, and can provide real-time, continuous and hemispherical coverage of the polar regions.
Ceriotti, Matteo +2 more
core +2 more sources
A theoretical study on throttle ranges of O/F controllable hybrid rocket propulsion systems
Journal of Fluid Science and Technology, 2018 The characteristics of several O/F control methods for hybrid rocket propulsion have been discussed and theoretically analyzed from the physical properties of propellants and fuel regression behavior.
Kohei OZAWA, Toru SHIMADA
doaj +1 more source
Aerospace, 2023 The combustion characteristics of a swirl-radial-injection composite fuel grain were experimentally and numerically investigated. This composite grain permits swirl-radial oxidizer injection based on three hollow helical blades, each having a constant ...
Ruoyan Wang +7 more
doaj +1 more source
Defence Science Journal, 2011 With their unique operational characteristics, hybrid rockets can potentially provide safer, lower-cost avenues for spacecraft and missiles than the current solid propellant and liquid propellant systems. Classical hybrids can be throttled for thrust tailoring, perform in-flight motor shutdown and restart.
Sankaran Venugopal +2 more
openaire +1 more source
Hybrid Rocket Engine Ignition and Control [PDF]
, 2020 Control of a hybrid rocket engine is dependent upon a robust system capable of executing commands at precise times. In order to accomplish this, hardware systems must be in place to control the flow of a pressurized gas and provide feedback to launch ...
Blampied, Trevor +3 more
core +1 more source
Emission-Driven Hybrid Rocket Engine Optimization for Small Launchers
Aerospace, 2022 Hybrid rocket engines are a green alternative to solid rocket motors and may represent a low-cost alternative to kerosene fueled rockets, while granting performance and control features similar to that of typical storable liquid rocket engines.
Lorenzo Casalino +3 more
doaj +1 more source
Novel pole-sitter mission concepts for continuous polar remote sensing [PDF]
, 2012 The pole-sitter concept is a solution to the poor temporal resolution of polar observations from highly inclined, low Earth orbits and the poor high latitude coverage from geostationary orbit.
Ceriotti, Matteo +2 more
core +2 more sources
Examining Metal Additives in a Marine Hybrid-Propellant, Water-Breathing Ramjet
Journal of Marine Science and Engineering, 2022 This research focuses on theoretically and experimentally evaluating the performance of a metallized hybrid-propellant, water-breathing ramjet. The aluminum and/or magnesium particles added to a polymeric (polyester) fuel grain are hydro-reactive, using ...
Nachum E. Eisen, Alon Gany
doaj +1 more source
Analysis of quasi-hybrid solid rocket booster concepts for advanced earth-to-orbit vehicles [PDF]
A study was conducted to assess the feasibility of quasi-hybrid solid rocket boosters for advanced Earth-to-orbit vehicles. Thermochemical calculations were conducted to determine the effect of liquid hydrogen addition, solids composition change plus ...
Andreev T. +7 more
core +2 more sources