Three-Dimensional Investigation of the Sound Sources with a High Spatial Resolution in Supersonic Jet Noise Using the Optical CT Microphone

在本研究中，“光”应用于“声”测量。“声波”是一种压力振荡，同时密度也在波动。在这里，CT（计算机断层扫描）应用于光学技术，并开发了“光学CT麦克风”，实现了高空间分辨率的非侵入式三维测量。对一个复杂三维塞式喷管进行了实验研究，分析了喷流噪声的声源结构与声辐射的关系。

In the present study, 'light' is applied to 'acoustic' measurements. 'Acoustic wave' is a pressure oscillation, and the density fluctuates at the same time. Here, a CT (computed tomography) is applied to the optical technique, and the 'optical CT microphone' is developed, which realizes non-intrusive and three-dimensional measurements with a high spatial resolution. An aerospike nozzle with a complicated three dimensionalconfiguration is tested, and the relationship between the source structure of the jet noise and their acoustic radiation was investigated.