<p>The article presents the results of using a previously developed method for three-dimensional localization of acoustic sources based on data from asynchronous measurements with a multimicrophone array from various positions, adapted for dipole-type sources characteristic of airframe noise. The article consists of two parts. In the first, the developed method was verified using the example of localization of test dipole sources. Sources with different orientations of the dipole moment with respect to the edges of the microphone array are considered. Based on the results of localizing test sources, it is shown that a dihedral array, the faces of which are parallel to the dipole moment of the source, allows more accurate identification of a dipole source in three-dimensional space compared to the general case. In the second part, the method is used to construct three-dimensional noise-source localization maps of a small-scale high-lift wing model with imitation of extended landing gear, which has a complex structure of dipole sources with various amplitudes and directions. The obtained volumetric localization maps in various frequency bands were analyzed by comparing such localization with test cases, and the possibility of localizing sources in this case was shown.</p>

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

On the Possibility of Three-Dimensional Localization of Airframe Noise Sources Using Sequential Asynchronous Microphone Array Measurements

  • O. P. Bychkov,
  • M. A. Demyanov

摘要

The article presents the results of using a previously developed method for three-dimensional localization of acoustic sources based on data from asynchronous measurements with a multimicrophone array from various positions, adapted for dipole-type sources characteristic of airframe noise. The article consists of two parts. In the first, the developed method was verified using the example of localization of test dipole sources. Sources with different orientations of the dipole moment with respect to the edges of the microphone array are considered. Based on the results of localizing test sources, it is shown that a dihedral array, the faces of which are parallel to the dipole moment of the source, allows more accurate identification of a dipole source in three-dimensional space compared to the general case. In the second part, the method is used to construct three-dimensional noise-source localization maps of a small-scale high-lift wing model with imitation of extended landing gear, which has a complex structure of dipole sources with various amplitudes and directions. The obtained volumetric localization maps in various frequency bands were analyzed by comparing such localization with test cases, and the possibility of localizing sources in this case was shown.