The algorithm and program complex for splitting on a parts the records of acoustic waves recorded during the work of plasma actuator flush-mounted in the model plane nozzle with the purpose of analyzing their robust spectral and correlation characteristics

• Published in: Journal of physics. Conference series 2014-01, Vol.490 (1), p.12231-5
• Main Authors: Chernousov, A D, Malakhov, D V, Skvortsova, N N
• Format: Article
• Language: English
• Subjects: Acoustic waves; Acoustics; Actuators; Air flow; Aircraft engines; Aircraft noise; Algorithms; Data acquisition; Engine noise; Flushing; Matlab; New technology; Noise reduction; Nozzles; Physics; Plasma; Plasma (physics); Pulse duration; Robustness; Sound generation; Spectra
• ISSN: 1742-6596; 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/490/1/012231

Currently acute problem of developing new technologies by reducing the noise of aircraft engines, including the directional impact on the noise on the basis of the interaction of plasma disturbances and sound generation pulsations. One of the devices built on this principle being developed in GPI RAS. They are plasma actuators (group of related to each other gaps, built on the perimeter of the nozzle) of various shapes and forms. In this paper an algorithm was developed which allows to separate impulses from the received experimental data, acquired during the work of plasma actuator flush-mounted in the model plane nozzle. The algorithm can be adjusted manually under a variety of situations (work of actuator in a nozzle with or without airflow, adjustment to different frequencies and pulse duration of the actuator). And program complex is developed on the basis of MatLab software, designed for building sustainable robust spectral and autocovariation functions of acoustic signals recorded during the experiments with the model of a nozzle with working actuator.