Effect of mean flow and damping on the performance of reactive mufflers

Auteurs-es

  • P.T. Thawani Dept. of Mech. Engng., Univ. of Calgary, Calgary, Alta., Canada
  • A.G. Doige Dept. of Mech. Engng., Univ. of Calgary, Calgary, Alta., Canada

Mots-clés :

noise abatement, mean flow, damping, reactive mufflers, mathematical modeling, exhaust mufflers, plane wave propagation, transfer matrices, noise reduction

Résumé

Il est apparu essentiel de tenir compte des effets de l'écoulement moyen dans la modélisation mathématique des silencieux afin d'obtenir des données réalistes. Dans cette communication, on présente deux modèles mathématiques qui décrivent la propagation d'ondes planes dans une conduite ou un détendeur en tenant compte de l'effet de l'écoulement moyen et de l'amortissement. Les solutions des équations du mouvement sont représentées par des matrices de transfert 2x2. Dans l'évaluation du rendement de silencieux, on calcule la réduction du bruit (RB) pour un silencieux â extrémité ouverte. Les valeurs de RB mesurées en laboratoire sur des silencieux concordent très bien avec les valeurs prévues par les matrices de transfert. La méthode de calcul de la RB se prêtre à des applications de caractère assez général, et il est possible d'étendre son utilisation â l'optimisation de la configuration des silencieux, lors de la conception.

Fichiers supplémentaires

Publié-e

1983-01-01

Comment citer

1.
Thawani P, Doige A. Effect of mean flow and damping on the performance of reactive mufflers. Canadian Acoustics [Internet]. 1 janv. 1983 [cité 14 mai 2026];11(1):29-47. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/497

Numéro

Vol. 11 No. 1 (1983)

Rubrique

Articles techniques

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