A STUDY OF NON-ISOENERGETIC TURBULENT JET MIXING BETWEEN COMPRESSIBLE SUBSONIC STREAMS IN AXI-SYMMETRIC CONSTANT AREA DUCT.

摘要

The problem of turbulent mixing between two compressible streams in a constant area duct is analyzed. The velocity and temperature profiles were worked in the main region of the mixing chamber for axi-symmetric case. Turbulent free jet experimental data is used,to obtain expressions for velocity and temperature as a function of the distance from the inlet to the mixing chamber. It is found that energy diffuses more rapidly than momentum for ducted mixing. The results of the theoretical analysis indicate increasing tendency towards segregation of the streams for decreasing initial velocity difference between the mixing streams. On the basis of the mixing chamber length required to achieve adequate degree of mixing,it is concluded that a corrugated rim primary nozzle is needed to accelerate the mixing rate by increasing the contact surface between the streams. (Author)