ADAPTIVE CONTROL OF AEROACOUSTIC INSTABILITIES

✍ Scribed by M. METTENLEITER; E. HAILE; S. CANDEL

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 455 KB
• Volume: 230
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2659

✦ Synopsis

This paper describes an experimental investigation of adaptive control algorithms applied to aeroacoustic instabilities. The study is carried out on a cold #ow experimental rig, designed to reproduce the essential features of acoustically coupled vortex shedding. This mechanism is the source of thrust oscillations in large segmented solid rocket motors. It is also found in a wide variety of combustion instabilities. Two adaptive control strategies are investigated and selected experimental results are reported. These results show the feasibility of control. The e!ect of the controller on the instability mechanism is analyzed and improvements to the control strategy are proposed. 2000 Academic Press E Few studies deal with unstable #ows coupled by acoustic (see, for example, Huang and Weaver [6] and Billoud et al. [7]) or mechanical (see Huang and Weaver [8]) resonances. 762 M. METTENLEITER E¹ A¸.