๐”– Bobbio Scriptorium
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A STUDY OF A NEGATIVE IMPULSIVE WAVE GENERATOR

โœ Scribed by T. Setoguchi; K. Matsuo; R. Nakatomi; K. Kaneko

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
308 KB
Volume
197
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

A compression wave discharged from the open end of a tube causes positive impulsive noise. Active noise cancellation, which is the cancelling of the noise by the addition of an inverse wave, is a useful technique for reducing impulsive noise. The main objective of this study is to present the design for a negative impulsive wave generator utilizing unsteady mass influx. In this paper, in order to clarify the relationship between the unsteady mass influx and the negative impulsive wave, numerical and aeroacoustic analyses have been carried out using an unsteady expansion wave discharged from the open end of a shock tube, together with the experimental investigations. As a result, the effect of an unsteady expansion wave on a negative impulsive wave is shown.

๐Ÿ“œ SIMILAR VOLUMES

STUDY OF THE IMPINGEMENT OF IMPULSE WAVE
STUDY OF THE IMPINGEMENT OF IMPULSE WAVE UPON A FLAT PLATE
โœ T. SETOGUCHI; H.-D. KIM; H. KASHIMURA ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 338 KB

The impulse wave is made by the weak normal shock discharge from an open end of a shock tube. In order to understand the dynamic characteristics of the impulse wave impinging upon a #at plate, experiments are performed over the shock Mach number range from 1)01 to 1)20. A #at plate is placed downstr