Vol. 36, issue 08, article # 10

Abstract:

The spatial distribution of the average air density in a supersonic jet is analyzed based on the results of laser transillumination. The algorithm for retrieving the average density from deviations of the translucent wave front transverse with respect to the jet axis was tested in experiments at the Vertical Jet Setup of ITAM SB RAS. The retrieval results are compared with the data of contact measurements known from the literature and with the results of numerical simulation. A good sensitivity of local wavefront slopes to fluctuations in air density at frequencies of discrete acoustic tones is show, which opens up possibilities for experimental study of their spatial structure inside the jet channel.

Keywords:

supersonic jet, laser transillumination, wavefront distortion, air density, retrieval

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