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FlowPAC Acoustics Research Scott C. Morris Thomas J. Mueller
Overview Basic and applied research Mix of theoretical, computational, and experimental capabilities Experimental tools include: –Anechoic Wind Tunnel (AWT) –Phased Microphone Array –Laser vibrometry –Particle Image Velocimetry
Schematic of Rotor Wake Phenomena
Swirling Flow Phenomena
Wake Distortion by Swirl
Top View of the Acoustic Pressure of a 3D Cascade with 30 o Stagger
Experimental Approach: Acoustic Theory LES calculations Hot-wire & PIV measurements Far field signature Boundary Conditions Unsteady wall pressure
Acoustic Arrays Array Panel #1 Flow Model
Beamforming Results (Example SPL map) U ref = 69 ft/s Array #1 z = 42 in. Test section boundary Model trailing edge location Flow: L to R Inlet noise Trailing edge noise Collector noise
How well does the array work? LOW Frequency example Combined sound BF-Left BF-Right
Acoustic spectra: 3 regions Low frequency Vortex shedding Broadband
PIV Experimental Setup Trailing Edge 12-bit CCD Cameras Nd YAG Lasers Lasers Sheet Camera view areas Flow
Instantaneous Flow Field Resutls shadow area
Instantaneous vorticity contours
Phase averaged vorticity
Prediction of broadband sound
Current Projects Include: Trailing Edge Sound Ducted Propulsion Acoustics of very light fluid-structure interactions Window buffeting Effect of structural acoustics on dipole source strength
Current techniques for measuring Muffler Transmission Loss.
Turbulent flow over groups of urban-like obstacles O. Coceal 1, T.G. Thomas 2, I.P. Castro 2 and S.E. Belcher 1 1 Department of Meteorology, University.
Laboratory Modeling of Atmospheric Dispersion at the Fluid Modeling Facility of the U.S. Environmental Protection Agency by William H. Snyder MiniTech.
Real-Time Auralization of Sound in Virtual 3D Environments by Scott McDermott
Real Life Adventures with Unsteady Aerodynamics by Dr. Atlee M. Cunningham, Jr. Lockheed Martin Senior Fellow Lockheed Martin Aeronautics Company, Fort.
Objectives Velocity and flow measurement Lab tour and data acquisition use.
Physical Modelling of Concentration Fluctuations in Simple Obstacle Arrays Robert Macdonald and Brian Kim Department of Mechanical Engineering University.
PENNY JEFFCOATE PROF. P. K. STANSBY & DR. D. A. APSLEY UNIVERSITY OF MANCHESTER Near-field Flow Downstream of a Tidal Barrage: Experiments, 3-D CFD and.
Background Interest is in maximizing the maneuverability of flight vehicles changing lift vector – but it takes time for forces (lift) to change, even.
ENV Envisioning Information Lecture 15 – Scientific Visualization Vector Data – Flow Visualization Ken Brodlie
Experience of using a CFD code for estimating the noise generated by gusts along the sunroof of a car by Liang Lai Supervisors: Professor C- H Lai, Dr.
C. M. Johnson, P. H. Riley and C. R. Saha Thermo-acoustic engine converts thermal energy into sound energy by transferring heat between the working media.
9.1 Vis_04 Data Visualization Lecture 9 Vector Field Visualization - Visualizing Flow Part 1: Experimental Techniques Particle based Techniques.
LINFLOW 1.41 Illustration on How to Study Response of a Ventilation Fan Subjected to High Frequency Loading. In this work the question was, why did the.
Journées microdrone - ONERA – Septembre 2004 Diapo N° 1 REMANTA REsearch program on Micro Aerial vehicle and New Technologies Application Brieuc DANET.
Phoenics User Conference on CFD May 2004 Vipac Engineers & Scientists Ltd COMPUTATIONAL FLUID DYNAMICS Simulation of Turbulent Flows and Pollutant Dispersion.
LINFLOW The Company. LINFLOW 1.42 Why LINFLOW ? n Enables the Engineer to Efficiently: u Study of His/Her Design Dynamics, if the Structure is in.
| Page Angelo Farina UNIPR / ASK Industries | All Rights Reserved | Confidential Boundary conditions The external surface of the solid model.
Marseilles, June 9-11, th International ERCOFTAC Symposium on Engineering Turbulence Modelling & Measurement Preamble: Three practical reasons for.
A mathematical model of steady-state cavitation in Diesel injectors S. Martynov, D. Mason, M. Heikal, S. Sazhin Internal Engine Combustion Group School.
The equations of motion and their numerical solutions I by Nils Wedi (2006) contributions by Mike Cullen and Piotr Smolarkiewicz.
E LECTRO M AGNETIC 3D S OLVER 12 A truly Affordable, Efficient, Powerful, Easy to learn Electromagnetic modeling tool Now 64 bit technology.
1 PV Generation in the Boundary Layer Robert Plant 18th February 2003 (With thanks to S. Belcher)
Phase III Presentation Group 7 Thomas Kudej Marko Sutovic Timothy Smith.
Direct Measurement of Wall Shear Stress in Single- and Multiphase Flows 1 Valery Sheverev, Lenterra Inc. and Bruce Brown, Srdjan Nesic, Ohio University.
1 Lecture 11 – Boundary Layers and Separation Applied Computational Fluid Dynamics Instructor: André Bakker © André Bakker ( ) © Fluent Inc. (2002)
Canopy Spectra and Dissipation John Finnigan CSIRO Atmospheric Research Canberra, Australia.
CHAM June 2009 Gateways to PHOENICS: SHELLFLO. Lecture to Heat Transfer Society, June 24, 2009 Advanced Stream Analysis: Predicting the Flow in Shell-and-Tube.
Technical Investigation Department. METHOD FOR 3-D MODELLING OF A MIXED FLOW PUMP USING PHOENICS D Radosavljevic.
Array di microfoni A. Farina, A. Capra. SPEAKERS ARRAYS FOR A PHYSICAL MODELLING PIANO 3D Techniques: Wave Field Synthesis Beam Forming CrossTalk Cancellation.
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