Molecular beam sampling from a rocket-motor combustion chamber

Conference · Tue Jan 01 04:00:00 EST 1974

OSTI ID:4138757

Houseman, J; Young, W S

A molecular-beam mass-spectrometer sampling apparatus has been developed to study the reactive species concentrations as a function of position in a rocket-motor combustion chamber. Unique design features of the sampling system include (a) the use of a multiple-nozzle end plate for preserving the nonuniform properties of the flow field inside the combustion chamber, (b) the use of a water-injection heat shield, and (c) the use of a 300 CFM mechanical pump for the first vacuum stage (eliminating the use of a huge conventional oil booster pump). Preliminary rocket-motor tests have been performed using the highly reactive propellants nitrogen tetroxide/hydrazine (N$sub 2$$O$$sub 4$/N$sub 2$$H$$sub 4$) at an oxidizer/fuel ratio of 1.2 by weight. The combustion-chamber pressure is approximately 60psig. Qualitative results on unreacted oxidizer/fuel ratio, relative abundance of oxidizer and fuel fragments, and HN$sub 3$ distribution across the chamber are presented. (FR)

• Research Organization: Jet Propulsion Lab., Pasadena, Calif. (USA)); (California Univ., Los Angeles (USA). School of Engineering and Applied Science
• NSA Number: NSA-33-012931
• OSTI ID: 4138757
• Country of Publication: France
• Language: English

Related Subjects

*MOLECULAR BEAMS-- MASS SPECTROMETERS
640301* --Physics Research--Atomic
Molecular & Chemical Physics--Beams & Their Reactions
COMBUSTION
DIAGNOSTIC TECHNIQUES
N60100* --Physics (Atomic & Molecular)--Atomic
Electron
Ion & Molecular Beams & Reactions
ROCKET ENGINES