Heuristic prediction of gas precipitation performance of self-excited oscillation cavity

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Why is it important?

Self-excited oscillation cavities are widely used in various engineering fields due to their ability to generate stable self-excited oscillation jets. This paper proposes to use the two low-pressure zones inside the cavity as the precipitation sites of dissolved gases in oil when the cavity is in stable jet. The velocity and pressure fields inside the self-excited oscillation cavity are investigated by numerical simulation with different dimensionless structural parameters. The simulation results show that the self-excited cavity can maintain good gas precipitation performance at d2/d1 = 2-2.4, D/d2 = 4-6 and D/L = 2. Meanwhile, the simulation results show that when the inlet velocity of the self-excited oscillation cavity reaches a certain value, the pressure inside the cavity does not decrease, so it is useless to increase the inlet velocity only.. Finally, the simulation and experimental data were fitted by a heuristic prediction model, and the fitting error (Root Mean Square Error) was 2.45%, which was considered to express the gas precipitation performance inside the self-excited oscillation cavity within the acceptable error range.