Effect of the radial temperature gradient on resonant oscillations of gas in a closed tube.

Resonant oscillations of gas in a closed tube with a heat source are studied. The amplitude-frequency characteristics and spatial distributions of pressure and velocity amplitudes in a tube with a radial temperature gradient are calculated. It is shown that a radial temperature gradient leads to the radial dependence of the oscillation velocity in the flow core and reduces the average value of the momentum source due to viscosity.

Deposition of polydisperse gas suspensions with nonlinear resonance oscillations in a closed tube.

The characteristics of the deposition of a polydisperse gas suspension (tobacco smoke) in a closed tube in the mode of transition to shock waves at the first natural frequency are studied experimentally. The natural deposition of tobacco smoke continues for a long time. When the oscillations are excited, the process occurs hundreds of times faster.