Engine noise directivity measurement method used in conventional indoor experiment environment

The invention relates to an engine noise directivity measurement method used in a conventional indoor experiment environment, and solves the problem that a noise experiment is difficult to carry out on an engine due to the influence and damage to a noise radiation field of the engine caused by wall reflection and the like in a conventional laboratory. A large number of experimental studies are carried out on noise characteristics of an aero-engine and components thereof in a conventional indoor laboratory, so that the noise experimental capability of the aero-engine is greatly improved. According to a microphone array experimental measurement method and a subarray-based directivity measurement method, the directivity of the engine can be accurately measured in a conventional indoor environment. 本发明涉及一种用于常规室内实验环境下发动机噪声指向性的测量方法，解决了常规实验室内由于墙面反射等原因，造成对发动机噪声辐射场的影响和破坏，从而难以对发动机进行噪声实验这一难题。通过在常规室内实验室内对航空发动机及其部件的噪声特性进行大量实验研究，将大大提高航空发动机噪声实验能力。并且依据传声器阵列实验测量方法和基于子阵列的指向性测量方法，可以在常规室内环境中精确测量得出发动机的指向特性。