F.B. Metzger, J.S. Preisser

This paper reviews the progress in predicting propeller tone noise from 1919 to 1994. A general discussion of the types of predictions, the noise sources, and the character of the noise produced is included as a framework for discussion. Both empirical methods based on the generalization of test results and theoretical methods that rely on basic physical principles are discussed. The theoretical methods described are divided into four categories: 1) early methods developed between 1919 and the late 1950s, 2) more recent methods based on early theoretical approaches which were developed between the late 1950s and early 1980s, 3) methods developed on the basis of Lighthills Acoustic Analogy between the mid 1960s and the present, and 4) methods based on direct use of computational fluid dynamics codes which were developed between the mid 1980s and the present. Examples of the accuracy of the various codes is shown by comparison with test results. The relationship between accuracy and complexity of the various methods, as applied to different propeller configurations, is discussed.

First Joint CEAS/AIAA Aeroacoustics Conference, München, 1995

Conference Paper

englisch

21,0 x 29,7 cm, 27 Seiten

DGLR-Bericht, 1995, 1995-01, First Joint CEAS/AIAA Aeroacoustics Conference - Proceedings; S.17-43; 1995; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

propeller, aeroacoustics, noise prediction

Bibliothek

1995