A5059379639- Rocket and propulsion systems research
- Energetic Materials and Combustion
- Electrohydrodynamics and Fluid Dynamics
- Spacecraft and Cryogenic Technologies
- Advanced Combustion Engine Technologies
- Astro and Planetary Science
- Economic, Social, and Public Health Issues in Russia and Globally
- Combustion and Detonation Processes
- Hydraulic and Pneumatic Systems
- Mechanical Engineering and Vibrations Research
- Business and Economic Development
- Economic and Business Development Strategies
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2018-2024
Nitromethane is a promising green propellant candidate. However, one potential issue for industrial use may be its high sensitivity to mechanical impact. In this paper, we assess the effect of adding several phlegmatizing substances (or inhibitors as call them), on impact and propulsive performance resulting mixtures. The nitromethane mixtures was characterized using BAM Fallhammer tester. theoretical rocket calculated utilizing NASA CEA program. This study resulted in identification...
Gel mono- and bipropellants (i.e., gelled fuels and/or oxidizers) are interesting candidates for advanced low-hazard rocket or ramjet propulsion systems gas dynamic systems. propellants combine major advantages of solid liquid systems, such as easy simple storage handling characteristics (solid systems) excellent throttleability (liquid systems). This article gives a short overview the themes obtained results about work conducted in Germany within last two half decades, whereas focus is set...
Hydrazine's carcinogenic and toxic nature makes its use in space propulsion expensive necessitates careful launch campaign planning, which may cause delays. One already established alternative is to energetic salt-based ionic solution propellants. However, the costs remain high because these salts are costly highly regulated materials. Additionally, propellants based on produce much higher temperatures during decomposition combustion, as case for hydrazine. Consequently, refractory...
As of now, the most widely used hypergolic fuels are hydrazine derivates with nitrogen tetroxide as oxidizer. The toxicity and carcinogenic character these substances make their handling challenging even if gelled. Therefore, there is great interest throughout propulsion community in finding alternatives for substances. However, despite a thorough literature review, clear selection criteria "green" hypergols could not be found. To tackle this issue, we developed set key requirements...
Hydrazine is a commonly used propellant in spacecraft and satellite propulsion, but it toxic as well carcinogenic, consequently the high costs associated with its handling have led propulsion community to seek alternatives. Our research group exploring use of nitromethane, low-toxicity substance staple laboratory solvent, primary ingredient for green monopropellant. However, nitromethane's ignition challenging, requiring certain level pressure stable combustion. To improve combustion...
старший викладач кафедри вогневої та спеціальної підготовки факультету службово-бойової діяльності Національної гвардії України Київського інституту
This paper presents the results of a hot-fire test campaign aimed at characterizing newly developed ignition system for nitromethane-based green monopropellants. Nitromethane-based propellants are cost-effective replacement hydrazine and energetic ionic liquid alternatives such as LMP-103S ASCENT. The uses glow plug source. Additionally, gaseous oxygen is injected simultaneously into combustion chamber beginning firing. After closing valve, pure monopropellant operation follows. Three series...
With the aim of replacing toxic, carcinogenic propellants, new gelled bipropellants were developed. Transition metal based nanoparticles utilised as catalysts for hypergolic bipropellant system with HTP oxidiser and TMEDA fuel. To test quality, ignition delay times (IDTs) determined via drop-on-pool tests. Various parameters optimised in order to exploit catalytic activity nanoparticles. It was found that silver is most suitable size, stabilisation distribution are important. An created...
In this paper a test setup to analyze the flow of gels in constriction is presented as well some first results tests performed. Two different and Newtonian fluid were pressed through geometry, which pipe with constriction. The pressure loss velocity field measured, out streamlines derived. showed interesting effects concerning losses comparison fluids under certain boundary conditions within tested geometry. Since cause patterns, patterns are shown, reference other analyses literature given....
Gelled propellants and their specific properties are of interest for both rocket ramjet applications due to the capability implementation a freely adjustable thrust control in combination with easy handling high operational safety. The performance flexibility storage characteristics merges major advantages liquid solid propulsion systems. At Institute Space Propulsion, German Aerospace Center (DLR), basic research on development, rheology, flow behaviour, spray combustion gels is performed....