Flame-Sheet Analysis of C. W. Diffusion-Type Chemical Lasers:Coupled Radiation,

摘要

The uncoupled radiation analysis of diffusion-type chemical lasers is modified to treat coupled collisional and radiative relaxation of vibrationally excited lasing diatomics for the limiting case of a radiatively saturated medium. Closed-form expressions for HF and DF laser performance are obtained that show dependence on experimental quantities,gas transport properties,and vibrational and chemical rate processes. The V - T portion of the vibrational energy-transfer model of an earlier report is generalized so that the relative importance of each collision partner in V - T energy transfer can be assessed. General scaling laws are derived that indicate different dependencies of laser performance on stoichiometry and temperature,depending on which species are dominant in vibrational de-excitation of HF(v);the scaling laws for the effect of gas pressure and oxidizer-channel height on laser power and efficiency are unchanged from those deduced in the earlier report. (Author)