Model for calculation of the gas flow in small-scale nozzles of cw chemical lasers

The problem of two-dimensional or quasi-three-dimensional flow of a multicomponent mixture in small-scale nozzles of a supersonic cw HF laser is solved numerically. A narrow-channel model taking account of chemical reactions in the interior and on the surfaces of nozzles is used. A comparison is made with a boundary-layer model and a model based on the two-dimensional Navier — Stokes equations. A good agreement between these models is obtained.