The Ryke effect is generally counted under the pulse combustion phenomena.
The working principle is more or less the same.
As a result of the oscillating gasses, even solid particles can be moved in a fluidized way, the spouting bed conditionings often occurs. The energy for this conditioning is not delivered by costly roots blowers but is extracted directly from the fuel. About 5 % of the power input by the fuel is converted to kinetic energy, into high gas velocities and they move the particles.