Sound generation by turbulent pre-mixed flames

✍ Scribed by J.A. Chillery

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 865 KB
• Volume: 8
• Category: Article
• ISSN: 0003-682X
• DOI: 10.1016/0003-682x(75)90013-4

✦ Synopsis

SUMMA R Y

Previous work l° on noise generation by small open burner stab!iised turbulent pre-mixed flames, performed elsewhere, showed that such aflame may be represented acoustically as an assembly Of monopole sound sources distributed throughout the reaction zone of (he flame. Over a limited frequency range a.strong correlation was observed between the far field sound pressure and the first time derivative of the heat release rate in the flame: The letter quantity was measured by monitoring the emission intensity of free radicals present in the reaction zone of the flames.

The present work was [nte~l~d to confirm these observation~ for a single ethylene/air flame and to extend she investigation to a double flame system.

Good qualitative and quantitative correlation was observed over a iimited frequeacy range for both single and double/lames. The frequencies beyond which the correlation deteriorated were identified accd, for the double flame, were found t~ depend on the spatial separation of the flames.