Accession Number:

ADA280933

Title:

Theories of Turbulent Combustion in High Speed Flows

Descriptive Note:

Annual rept. Apr 1993-Apr 1994

Corporate Author:

CALIFORNIA UNIV SAN DIEGO LA JOLLA

Personal Author(s):

• Libby, P. A.
• Williams, F. A.

Report Date:

1994-05-25

Pagination or Media Count:

7.0

Abstract:

This research involves theoretical studies of the chemical and fluid- mechanical phenomena which make turbulent combustion in high-speed flows different from such combustion in low-speed flows. Finite-rate chemistry plays a significant role in high-speed flows because of the small ratios of flow times to chemical times. The studies address ignition and extinction phenomena in nonpremixed turbulent combustion of hydrogen-air systems by both numerical and asymptotic methods. Attention also is paid to effects of compressibility in high-speed turbulent combustion, with consideration given to interdispersal configurations of shocklets and flamelets. Efforts are made to provide a firmer foundation for the modeling of high-speed turbulent reacting flows, to aid in the development of a formulation which gives results that can be compared with experiments on turbulent combustion.

Descriptors:

• *VELOCITY
• *TURBULENT FLOW
• *COMBUSTION
• *FLAMES
• EXTINCTION
• RATIOS
• MECHANICAL PROPERTIES
• HYDROGEN
• CHEMICAL REACTIONS
• IGNITION
• DISPERSIONS
• COMPRESSIVE PROPERTIES
• SUPERSONIC FLOW
• KINETICS
• DIFFUSION
• FLUIDS
• CONFIGURATIONS
• TIME
• MODELS
• AIR
• FORMULATIONS
• NUMERICAL ANALYSIS

Subject Categories:

• Physical Chemistry
• Fluid Mechanics
• Mechanics
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE