Reacting Flow and Pressure Recovery Processes in HF/DF Chemical Lasers.

摘要

Several properties of gas dynamic processes that occur in flowing gas lasers are discussed and their importance in establishing laser performance is outlined. The continuous HF (or DF) supersonic diffusion chemical laser is chosen to illustrate the coupling between chemical energy release and fluid dynamics in a laser of current interest. A simplified quasi-one-dimensional analysis is used to illustrate the energy release rates in different parts of a combustion-heated DF laser. The complex nature of the reacting mixing flow in the lasing zone is described,and the properties of the initial reaction generated shock waves in the flow are estimated through a displacement thickness analysis. Finally, a partial constant area concept for use with a supersonic diffusion chemical laser is analyzed. (Modified author abstract)