On the possibility of three-dimensional localization of noise sources generated by the flow around aircraft planform elements using sequential asynchronous measurements by a microphone array

The paper presents the results of applying a previously developed method for three-dimensional localization of acoustic sources using asynchronous measurements from a multi-microphone array in different positions, adapted for dipole-type sources typical of the noise generated by the flow around aircraft planform elements. The work consists of two parts. The first part presents the verification of the developed method using test dipole sources as an example. Sources with different orientations of the dipole moment relative to the faces of the microphone array are considered. Based on the obtained localization results for test sources, the features and limitations of the method are demonstrated. In the second part, the application of the method to experimental data obtained during the flow around a wing model with deployed high-lift devices and a cylinder simulating a landing gear strut, which has a complex structure of dipole sources with varying amplitudes and directivities, is described. An analysis of the obtained volumetric localization maps in various frequency bands is carried out by comparing them with test cases, demonstrating the feasibility of localizing the studied sources.