IGNITION AND STABILIZATION BY THE OPTICAL DISCHARGE OF HOMOGENEOUS BURNING IN HIGH-SPEED JET

The experimental research of influence of focused impulsno-periodic radiation СО₂ – the laser on initiation and development of process of distribution of burning in to and a supersonic stream homogeneous fuel-air of mixes (СН₄ + air) is spent. Radiation СО₂-laserа extended across a stream and was focused by a lens on an axis of a supersonic stream. The shadow scheme was applied to registration of structure of a current with a crack and the flat knife located along a stream. The image it was fixed by the high-speed chamber in due course expositions 1.5 µs and frequency of shots 1000 1/s. It is shown, that at cross-section input of laser radiation in a flux the periodic structure of a thermal trace, with a forming of head jump of a gland from a band energy deposition is formed. At small frequencies of a resulting of pulses of laser radiation interaction of a thermal cloud with a flux occurs in a pulse mode. Is developmental process of non-stationary ignition by the optical category of a metano-air mix is shown at the subsonic expiration in motionless atmosphere. Results of optical visualization testify about burning in a trace behind a field of the optical category.

Keywords:
the optical discharge, supersonic nonisobaric jet, schlieren registration, homogeneous combustion.
УДК 536.46; 533.98

IGNITION AND STABILIZATION BY THE OPTICAL DISCHARGEOF HOMOGENEOUS BURNING IN HIGH-SPEED JET