Aero engine sand dust ingestion electrostatic monitoring simulation experiment

A simulation experiment method for electrostatic monitoring of aero engine dust ingestion was proposed. Based on ANSYS electromagnetic field analysis module, a finite element model was established, the electrostatic induction signals of sand dust ingestion under different particle sizes, charge-mass ratios, moving speeds and mass concentrations were simulated experimentally, and the induced charge and voltage signals were analyzed from the time domain and frequency domain, respectively. The relationship between particle size and other macroscopic parameters of sand ingestion and electrostatic monitoring signals was studied to establish a characteristic index used to characterize the particle size of sand dust particles. The eigenvectors were established based on the power spectral density distributions of the IDMS(ingested debris monitoring system) induced voltage signals. The Manhattan distance and the Euclidean distance were used as characteristic indicators to characterize the sand particle size. Simulation results showed that the characteristic index was positively correlated with sand dust particle size, and it was not affected by the movement velocity and charge-mass ratio of sand ingestion, but affected by the sand dust ingestion mass concentration. Further studies will use quality concentration to correct the characteristics of the indicators and carry out verification experiments.