Results 31 to 40 of about 289 (114)

On the liquid layer instability process in hybrid rocket fuels

FirePhysChem, 2021
This work is focused on the study of the combustion mechanism of a class of fast-burning fuels, the so-called liquefying fuels, in hybrid rocket engines.
Anna Petrarolo, Mario Kobald
doaj   +1 more source

Comparative Thermodynamic and Preliminary Performance Assessment of N₂O, Gaseous O₂, and LOX for a 1 kN Hybrid Rocket Engine

Aerospace
Hybrid rocket engines offer a compromise between safety, controllability, and performance, making them attractive for small-scale propulsion systems. However, oxidizer selection remains a critical early-stage design decision that cannot be determined ...
Sebastian Valencia, Jaime Enrique Orduy, Zahir Rojas   +2 more
doaj   +1 more source

Investigation of the existing methods for designing pre-combustion chambers in hybrid rocket engines

Авіаційно-космічна техніка та технологія
Hybrid propellant rocket engines (HPRE) have been under development and advancement since the beginning of rocket propulsion research, alongside liquid and solid propellant rocket motors.
Maurício Sá Gontijo
doaj   +1 more source

Polymer Combustion as a Basis for Hybrid Propulsion: A Comprehensive Review and New Numerical Approaches

Energies, 2011
Hybrid Propulsion is an attractive alternative to conventional liquid and solid rocket motors. This is an active area of research and technological developments.
Vasily Novozhilov, Hui Wang, Jun Liu, Keiichi Ishiko, Toru Shimada, Paul Joseph   +5 more
doaj   +1 more source

Dynamic Testing of a Hybrid-Propellant Water-Breathing Ram Rocket in Underwater Cruise Conditions

Journal of Marine Science and Engineering
High-speed submerged marine vehicles, such as torpedoes, traveling at velocities of an order of 100 m/s and above, require powerful propulsion to overcome the tremendous hydrodynamic drag.
Sagi Dinisman, Nachum E. Eisen, Alon Gany   +2 more
doaj   +1 more source

Analysis of the characteristics of the ejector mode of the pulse detonation propulsion system of the combined acceleration cycle

Авіаційно-космічна техніка та технологія
The subjects of this article are processes in the chamber of the pulse detonation propulsion system of the combined acceleration cycle (PSCA). The goal is to identify the most significant factors and study their influence on the defining characteristics ...
Olena Zolotko, Oleksandr Zolotko, Oleksandr Aksonov, Vitalii Stoliarchuk, Oleksandr Cherniavskyi   +4 more
doaj   +1 more source

Investigation of Performance Stability of a Nytrox Hybrid Rocket Propulsion System

Aerospace
Nitrous oxide is a highly suitable oxidizer for hybrid rockets due to its self-pressurizing properties, moderate cost, and high accessibility. However, its vapor pressure and density are highly dependent on ambient temperature, requiring careful ...
Shih-Sin Wei, Jui-Cheng Hsu, Hsi-Yu Tso, Jong-Shinn Wu   +3 more
doaj   +1 more source

Experimental Study of Polyurethane-Based Fuels with Addition of Paraffin and Aluminum for Hybrid Rocket Motors

Journal of Aerospace Technology and Management, 2013
http://dx.doi.org/10.5028/jatm.v5i3.228 Experimental investigation was conducted to determine the relative propulsive and combustion behavior of several polyurethane-based solid-fuel formulations containing 30% w/w of paraffin or 10% of aluminum powder.
Susane Ribeiro Gomes, Leopoldo Rocco Junior, José Atílio Fritz Fidel Rocco, Koshun Iha   +3 more
doaj  

3D printed hybrid rocket fuels with μAl core-shell particles coated with polyvinylidene fluoride and polydopamine: Enhanced combustion characteristics

Defence Technology
3D printing technology enhances the combustion characteristics of hybrid rocket fuels by enabling complex geometries. However, improvements in regression rates and energy properties of monotonous 3D printed fuels have been limited.
Qihang Chen, Xiaolong Fu, Weitao Yang, Suhang Chen, Zhiming Guo, Rui Hu, Huijie Zhang, Lianpeng Cui, Xu Xia   +8 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