Accession Number:

AD0672975

Title:

EXPERIMENTAL STUDY OF THE TURBULENT MIXING OF SUBSONIC AXISYMMETRIC GAS STREAMS

Descriptive Note:

Final rept. Jul 1966-Oct 1967

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

• Chriss, D. E.

Report Date:

1968-08-01

Pagination or Media Count:

95.0

Abstract:

An experimental study of the turbelent mixing of subsonic axisymmetric gas streams was conducted. Hydrogen-air and air-air mixing systems were studied, and the velocity ratio jet velocityouter stream velocity was varied from 2.4 to 6.3. Special emphasis is placed on 1 the centerline decay and radial profile shapes of composition, velocity, and total enthalpy and 2 the relationships between the turbulent transport of mass, momentum, and energy. The major conclusions drawn for this particular set of conditions are 1 for the hydrogen-air system the centerline decay decreases with increasing velocity ratio, 2 profile similarity of composition, velocity, and total enthalpy is a valid assumption, 3 there is a definite relationship between the transport of momentum and energy which is not compatible with a constant Prandtl number, and 4 unity Lewis number is a valid assumption. The experimental data obtained are tabulated for the benefit of other investigators.

Descriptors:

• *JET MIXING FLOW
• AIR
• AXISYMMETRIC FLOW
• BOUNDARY LAYER
• FLOW FIELDS
• HYDROGEN
• STATISTICAL DATA
• SUBSONIC CHARACTERISTICS
• TURBULENCE

Subject Categories:

• Aerodynamics
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE