Large-Eddy Simulation of Propulsor Noise
Abstract
We propose to develop the LES capability to predict marine propulsor noise in MPCUGLES.Under ONR support we have developed the poro"us Ffowcs-William-Hawkings (1969) acousticanalogy and Curle (1986) methodologies for unstructured grids, and an efficient dynamicm"ethodology for end-cap correction. We have successfully applied the methodologies to predictthe sound radiated by bluff body cylind"ers, trailing edges and marine propeller P4381. We proposeto extend the capability to (i) unstructured overset grids which will all""ow prediction of soundradiated by ducted propulsors involving rotor/stator interactions, boundary layer/propellerinteraction noise"" and sound predicted during maneuvering (ii) unsteady, time-accurate finiteelement solution of the structural equations (elastic so"lids) to obtain acoustic source terms due tosurface deformation by fluid loads (Blake 1986). The simulations will be validated against theoryand experiment.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 29, 2017
- Source ID
- N000141712939
Entities
People
- Krishnan Mahesh
Organizations
- Office of Naval Research
- Regents of the University of Minnesota
- United States Navy