INVESTIGATION 01' NOISE SUPPRESSION BY SONIC INLETS FOR TURBOFAN ENGINES VolumeⅢ: An Experimental Investigation of the Internal Noise Field of Two Axisymmetric Sonic Inlet Models

摘要

This document presents near-field acoustic data taken inside two sonic inlet models. The experiment was carried out with a high-frequency-response transducer on a stinger probe which surveyed the inlet at three different planes and three different radii. The range of inlet throat Mach numbers was from 0.5 to 1.0.