Details
| Original language | English |
|---|---|
| Pages (from-to) | 44-52 |
| Number of pages | 9 |
| Journal | Propellants, Explosives, Pyrotechnics |
| Volume | 30 |
| Issue number | 1 |
| Publication status | Published - 24 Feb 2005 |
| Externally published | Yes |
Abstract
Two potential sources for engine complications with methylhydrazine/ nitrogen tetroxide rocket engines were examined. The products formed during a cold pre-reaction before the actual ignition of the rocket engine and their later behavior were investigated with Car-Parrinello molecular dynamics simulations. It was found that methyldiazene is the main product of the cold pre-reaction. As a side product, especially in the presence of an excess of methylhydrazine, dimethyltetrazanes are formed. These may be responsible for violent side reactions. We also examined possible plume deposits, which are mainly formed in pulsed mode operation, for their influence upon the operation of a rocket engine. We synthesized methylhydrazinium and dimethylhydrazinium nitrate as well as methylhydrazinium azide and determined their crystal structure and sensitivity.
Keywords
- Fuel, High-Energy Materials, Monomethylhydrazine (MMH), Nitrogen Tetroxide (NO), Rocket Propulsion
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
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In: Propellants, Explosives, Pyrotechnics, Vol. 30, No. 1, 24.02.2005, p. 44-52.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Processes during the hypergolic ignition between monomethylhydrazine (MMH) and dinitrogen tetroxide (N2O4) in rocket engines
AU - Frank, Irmgard
AU - Hammerl, Anton
AU - Klapötke, Thomas M.
AU - Nonnenberg, Christel
AU - Zewen, Helmut
PY - 2005/2/24
Y1 - 2005/2/24
N2 - Two potential sources for engine complications with methylhydrazine/ nitrogen tetroxide rocket engines were examined. The products formed during a cold pre-reaction before the actual ignition of the rocket engine and their later behavior were investigated with Car-Parrinello molecular dynamics simulations. It was found that methyldiazene is the main product of the cold pre-reaction. As a side product, especially in the presence of an excess of methylhydrazine, dimethyltetrazanes are formed. These may be responsible for violent side reactions. We also examined possible plume deposits, which are mainly formed in pulsed mode operation, for their influence upon the operation of a rocket engine. We synthesized methylhydrazinium and dimethylhydrazinium nitrate as well as methylhydrazinium azide and determined their crystal structure and sensitivity.
AB - Two potential sources for engine complications with methylhydrazine/ nitrogen tetroxide rocket engines were examined. The products formed during a cold pre-reaction before the actual ignition of the rocket engine and their later behavior were investigated with Car-Parrinello molecular dynamics simulations. It was found that methyldiazene is the main product of the cold pre-reaction. As a side product, especially in the presence of an excess of methylhydrazine, dimethyltetrazanes are formed. These may be responsible for violent side reactions. We also examined possible plume deposits, which are mainly formed in pulsed mode operation, for their influence upon the operation of a rocket engine. We synthesized methylhydrazinium and dimethylhydrazinium nitrate as well as methylhydrazinium azide and determined their crystal structure and sensitivity.
KW - Fuel
KW - High-Energy Materials
KW - Monomethylhydrazine (MMH)
KW - Nitrogen Tetroxide (NO)
KW - Rocket Propulsion
UR - http://www.scopus.com/inward/record.url?scp=25444461096&partnerID=8YFLogxK
U2 - 10.1002/prep.200400084
DO - 10.1002/prep.200400084
M3 - Article
AN - SCOPUS:25444461096
VL - 30
SP - 44
EP - 52
JO - Propellants, Explosives, Pyrotechnics
JF - Propellants, Explosives, Pyrotechnics
SN - 0721-3115
IS - 1
ER -