The Time Varying Aeroacoustic Response of Rotors Subjected to Transient Inflows: Analytical Study
Abstract
This proposal describes a program of work that is designed to enhance the modeling capabilities for the prediction of rotor noise when the rotor inflow includes a transient turbulent inflow.This program will have three major objectives:A) Transient Flow Descriptors: The objective of this part of the study will be to define the appropriate parameters needed to scale the far field noise from a rotor subject to a transient flow disturbance that is embedded in a turbulent wall flow.B) Time and Space RDT: This part of the study will evaluate the evolution of a transient disturbance as it is convected downstream in a shear flow using RDT.C) Aeroacoustic Tomography: Aeroacoustic Tomography uses far field noisemeasurements to measure turbulence. In this part of the study, existing rotor noise measurements made in a wind tunnel will be used to determine the distribution of turbulence lengthscale and tke at the face of the rotor.The work in this study will be in collaboration with an experimental program at Virginia Tech and a numerical study at the University of Notre Dame. The detailed experimental program is described in a companion proposal from Virginia Tech and will support the development of an analytical model.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 20, 2020
- Source ID
- N000142012665
Entities
People
- Stewart Glegg
Organizations
- Florida Atlantic University
- Office of Naval Research
- United States Navy