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UID:0-281@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20201014T163000

DTEND;TZID=Asia/Jerusalem:20201014T173000

DTSTAMP:20230525T070815Z

URL:https://aerospace.technion.ac.il/events/large-eddy-simulation-of-rotor
 s-filtered-actuator-line-modelling-of-wind-turbines-and-aeroacoustics-of-p
 ropeller/

SUMMARY:Large Eddy Simulation of Rotors: Filtered Actuator Line Modelling o
 f Wind Turbines and Aeroacoustics of Propeller
DESCRIPTION:Lecturer:Ronith Stanly\n Faculty:Department of Aerospace Engine
 ering\n Institute:Technion – Israel Institute of Technology\n Location:h
 ttps://technion.zoom.us/j/95290857526\n Zoom: \n Abstract: \n Details: \n 
 Engineering devices employing rotors such as propellers on UAV’s\, wind 
 and tidal turbines play a vital role in both propulsion and energy extract
 ion.  These devices feature complex unsteady turbulent flowfields and hav
 e significant non-local effects related to downstream wake interactions an
 d far-field noise.  In the past decade\, the use of advanced turbulence m
 odeling approach within a computational fluid dynamics (CFD) approach\, su
 ch as large eddy simulations (LES) have become more popular.  LES offers 
 higher fidelity but also increases computational cost.  When dealing with
  multi-rotor devices such as quad-copters or wind farms the cost of blade-
 resolved LES becomes prohibitive.  Combining LES with the family of lower
 -fidelity models\, called actuator line models (ALM)\, has grown in popula
 rity in the past decade.  ALM models replace full blade resolution with a
 n array of actuator points or lines parameterized by aerodynamic lift/drag
  polar plots along the blades.  Body forces computed based on these actua
 tor points are then projected onto the LES flow mesh mimicking the effect 
 of rotating blades on the flow.  In this seminar\, an ALM model is implem
 ented into an in-house high-fidelity LES code\, called MIRACLES\, and appl
 ied to (a) rotor wake flow and noise predictions\, and (b) several benchma
 rk single- and twin-wind turbine cases.  Wherever possible comparisons ar
 e made to both measured data and previous simulation results to assess the
  performance of the combined LES/ALM approach for simulating rotor flows.
   Novel aspects of this study include the implementation of the Ffowcs-Wi
 lliams Hawkings (FWH) noise model and the recent Filtered-ALM and its MPI 
 parallelization.  Simulations typically are run on several hundred CPU co
 res and take several days to a week to gather flow and statistical results
 .
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/95290857526

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