Accession Number:

ADA576105

Title:

Mixing in Shear Coaxial Jets with and without Acoustics

Descriptive Note:

Briefing charts

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR

Personal Author(s):

• Leyva, Ivett A.
• Teshome, Sophonias
• Rodriguez, Juan
• Graham, Jeff

Report Date:

2012-03-29

Pagination or Media Count:

72.0

Abstract:

Modern rockets operate at supercritical pressures with respect to the propellants. Researchers need to understand mixing and combustion beyond liquid, gas states. Shear coaxial injectors are a common choice for cryogenic liquid rocket engines. Interactions of transverse acoustics with injectors own modes and mixing need to be understood for combustion instability. Need to understand differences in response to pressure and velocity nodes. Understand what non-dimensional numbers capture the mixing of typical injectors, characterize how geometry affects mixing.

Descriptors:

• *ACOUSTICS
• *COAXIAL CONFIGURATIONS
• *ROCKETS
• COMBUSTION
• COMBUSTION STABILITY
• CRYOGENIC ENGINES
• GASES
• GEOMETRY
• INJECTORS
• INTERACTIONS
• LIQUIDS
• MIXING
• RESPONSE
• SHEAR PROPERTIES
• SUPERCRITICAL FLOW
• VELOCITY

Subject Categories:

• Rockets
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE