Ejectors for pressure recovery systems of supersonic chemical lasers
V.M. Malkov1,2, I.A. Kiselev2, I.V. Shatalov1, A.A. Duk1, and A.V. Emelyanova2В
1SPE Advent, Saint Petersburg, Russia
2Ustinov Voenmekh Baltic State Technical University, Saint Petersburg, Russia
E-mail: v.m.malkov@gmail.com
Keywords: supersonic ejectors, nozzles, multi-nozzle ejectors, parametric numerical studies, ejection coefficient, compression ratio, supersonic chemical lasers, pressure recovery system, experimental data, verification
Pages: 431–447
Abstract
Results of a
numerical study of performance characteristics of supersonic ejectors with
nozzles of different types are reported. The work was carried out with the aim
of developing a high-performance ejector for pressure recovery systems of
supersonic chemical lasers. A specific feature of the operation of ejectors in
pressure recovery systems consists in that, in this case, the ejecting and
ejected gases, as they undergo mixing, have different thermodynamic
properties, and the ejection coefficient depends on the ratio between the
temperatures of the gases and on the ratio of their molecular masses. Since the
operation of an ejector is based on the mixing process, the task consisted in
intensification of this process using nozzles of special geometries. The
performance of ejectors was judged considering an integral parameter, the product of induction by compression ratio. The
calculations of the 3D viscous gas flow in the ejector channel were
performed using ANSYS software. In verifying the numerical model, a comparison
with experimental data obtained earlier on a model ejector facility and during
tests of real pressure recovery systems in operation with supersonic chemical
lasers was performed.
DOI: 10.1134/S0869864317030118
|
