Turbulent Mixing and Reacting Flow Characterization

Abstract

Complex turbulent mixing and reacting flows must be characterized in greater detail than is currently possible if analyses are to yield meaningful guidance in the design of practical hardware. An assessment is made of the relative importance of turbulent mass, momentum, and energy transport, and mass transport (mass mixing) demonstrated to be more significant than either energy or momentum transport for a coaxial hydrogen jet reacting with an external high-temperature air stream. A technique is presented for developing and evaluating mixing models, applicable to both reacting and nonreacting flows, in which experimental mean concentration, velocity, and density profiles are differentiated directly, and local transport coefficient distributions obtained.