Simulation model and computation of noise emission of an installed propeller

R. M. Ardito Marretta, G. Davi, A. Milazzo, G. Lombardi, M. Carley

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A computational method for the investigation of the interference between wing and a tractor propeller has been extended to determine the generated noise characteristics. First, the aerodynamic interaction has been studied by modeling both the propeller and wing wakes, in isolated and coupled configurations. The aerodynamic model for the wing-propeller interaction is based on a hybrid numerical technique, the free wake analysis (FWA) and a three-dimensional boundary element method (BEM), applied to the wakes of a propeller and a wing, respectively. Subsequently, a time-domain formulation for the sound radiated by the installed propeller moving in a steady uniform flow is used. More important, the FWA and BEM formulations also provide a way of examining the physics of the problem of the aeroacoustic interference and the processes that drive the observed effects of propeller asymmetric inflow. On the basis of previous author's works in which the research was focused on the wing-propeller pressure coefficient distribution related to the altered upstream conditions of the coupled propeller, in the present paper a more complete model is derived, which uses the full surfaces of a four-bladed propeller (with evolutive chord distribution and nonlinearly twisted blades), in order to use the complete surface loading distribution in the prediction of the noise generated by the wing-propeller interaction. The results confirm the advantages of the present approach using the FWA and BEM in identifying the aerodynamic and aeroacoustic features of the mutual interference of a wing and a propeller in forward flight and at a fixed propeller operating condition. Applications of this numerical hybrid scheme to an isolated wing and propeller, as well as to coupled configurations, are shown in the present paper. From the present results, the code predictions are shown to be efficient in evaluating both overall and local aerodynamic and aeroacoustic wing-propeller characteristics in the axial flight regime.

Original languageEnglish
Pages (from-to)104-116
Number of pages13
JournalComputer Modeling and Simulation in Engineering
Volume4
Issue number2
Publication statusPublished - 1 Jan 1999

Keywords

  • Propeller noise
  • Wing-propeller interference

ASJC Scopus subject areas

  • Modelling and Simulation
  • Ocean Engineering

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