The Classification and Numerical Calculation of Noise Propagation outside Pulse Detonation Engine

doi:10.3969/j.issn.1000-1093.2015.10.005

Abstract

Abstract: The propagation of detonation noise is divided into three regions based on the nonlinear intensity to explore the mechanism of the noise propagation out of pulse detonation engine(PDE), which are strongly nonlinear region, weak nonlinear region and linear region. Three methods are used to solve the corresponding control equations. The calculated result shows that the detonation noise amplitude decays quickly at the jet. The rate of decay decreases with the increase in radial distance. The largest rate of decay is 33 dB/m in the strongly nonlinear region while the least rate of decay is 1.02 dB/m in the weak nonlinear region. The results are of great significance for studying the mechanism of detonation noise.

Key words: ordnance science and technology, pulse detonation engine, detonation noise, attenuation law, numerical simulation

CLC Number:

V231.2⁺2

HUANG Xiao-long， XU Gui-yang， WENG Chun-sheng， LI Ning. The Classification and Numerical Calculation of Noise Propagation outside Pulse Detonation Engine[J]. Acta Armamentarii, 2015, 36(10): 1855-1860.

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