| 摘要 |
A reciprocating movement of the combustion air and gas through a glow bed (13) is provided by exposing the bed to a high particle sound velocity. For this, an external low frequency generator (11) of max. frequency of 30 hz is used. The dimensions of the grate in a plane transverse to the reciprocating movement of combustion air and gas are below a quarter of the wave length of the generated sound. The sound generator frequency is determined by a Helmholtz resonator or a reciprocating mechanism. The resonator can be in the form of an electrical loudspeaker. |
