Strange aeroacoustic waves in a flow duct with flexible walls

• Philippe Destuynder ^[1]
  1. [1] Chaire de Calcul Scientifique Département de Mathématiques. CNAM, París
• Localización: XVII Congreso de Ecuaciones Diferenciales y Aplicaciones ; VII Congreso de Matemática Aplicada: Salamanca, 14-28 septiembre 2001 / coord. por Luis Ferragut Canals, Anastasio Pedro Santos Yanguas, 2001, ISBN 8469961446, págs. 85-105
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • From a uni-dimensional model for acoustic waves in a flow duct, an analysis of the exact controllability of initial perturbations is suggested using the so-called HUM method of J. L. Lions. Several restrictive hypotheses are required and the minimum delay necessary for an exact control is a function of the three following velocities: the steady flow one, the waves celerities in the flexible structure and in the flow. Then we discuss how to use piezo-actuators in order to control the noise perturbations. The goal of the study is to evaluate a new technology for a noise insulator in an air conduct.