|Table of Contents|

Detonation noise characteristics of pulse detonation engine in near-field

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2014年06期
Page:
781-
Research Field:
Publishing date:

Info

Title:
Detonation noise characteristics of pulse detonation engine in near-field
Author(s):
Xu GuiyangWeng ChunshengLi Ning
National Key Laboratory of Transient Physics,NUST,Nanjing 210094,China
Keywords:
explosion mechanics pulse detonation engines atomizing gasoline noise radiation directivity detonation noise impulsive noise jet noise attenuation coefficients axial distance
PACS:
V231.22
DOI:
-
Abstract:
To study the formation mechanism and control method of detonation noise for gas-liquid two-phase pulse detonation engines,atomizing gasoline detonation noise in near-field is measured and analyzed.A theory model is set up and the space-time conservation element and solution element method(CE/SE)is utilized in near-field numerical simulation of pulse detonation engine detonation noise.The results show that:detonation noise is mainly composed of impulsive noise and jet noise; impulsive noise plays a dominant role in detonation noise and causes detonation peak noise; detonation peak noise is proportional to -3 power of the radial distance in near-field; the fitted attenuation coefficients are 4.3×10-2,3.4×10-2,2.8×10-2 and 7.0×10-3 at the 0°,30°,45° and 90° directions; obvious directivity of pulse detonation engine detonation peak noise occurs in near-field; pulse detonation engine detonation peak noise amplitude decrease gradually with the increase of measurement angle; pulse detonation engine jet noise amplitude decrease gradually with the increase of axial distance; when the axial distance is less than 900mm,the rate of jet noise decay is lower than that of the impulsive noise; when the axial distance is more than 1 200 mm,the rate of jet noise decay is higher than that of the impulsive noise.

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Last Update: 2014-12-31