Second-Order Closure of Turbulent Reacting Shear Flows.
Annual scientific rept. 1 oct 74-29 Feb 76,
AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC NJ
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For a number of turbulent flow problems, a first-order closure or eddy transport approach to the modeling of the turbulence is not sufficiently accurate. It is necessary that a more powerful approach be used to study the dynamics of the turbulence. Flows involving chemical reactions, such as those in a chemical laser, are good examples of flows requiring a more powerful approach. The mixing in HF and DF chemical lasers takes place under conditions of very large heat release. The coupling between the heat release and the turbulence is an important feature of the flow. A.R.A.P. has been funded to employ this basic method to investigate problems connected with chemical lasers of particular interest to the Air Force Weapons Laboratory. These studies have resulted in considerable insight into the complex processes occurring in laser cavities. This report describes recent results of studies using the reacting shear layer RSL computer program and discusses the proposed procedure for handling multi-step chemical reactions in a second-order closure computation of turbulent reacting flows.
- Lasers and Masers
- Fluid Mechanics