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SUMMARY:Free Online Seminar: Multi-fidelity aerodynamic analysis of a small
 -scale drone propeller in challenging operative conditions
DESCRIPTION:We are happy to invite you to the free online seminar titled: \
 "Multi-fidelity aerodynamic analysis of a small-scale drone propeller in c
 hallenging operative conditions.\" The seminar will be presented by Alessa
 ndro Grava\, PhD student in Aerospace Engineering at Politecnico di Torino
 .
 Date: Thursday\, October 16Time: 03:00 PM – 04:00 PM
 Abstract:
 A
 s small drones become increasingly relevant in various applications\, thei
 r operation demands a deeper understanding of their aerodynamic behaviour 
 beyond ideal operative conditions. This seminar presents a multi-fidelity 
 investigation of a small-scale drone propeller under challenging scenarios
  that are critical to performance and reliability\, but often neglected in
  standard design approaches.
 The first analysed condition involves the i
 nteraction with an external cross-flow\, perpendicularly oriented to the p
 ropeller’s rotation axis. The cross-flow condition is representative of 
 forward flight\, gust encounters\, and rotor-to-rotor interactions in mult
 icopter systems. A combination of advanced experimental techniques\, inclu
 ding Particle Image Velocimetry (PIV)\, and high-fidelity computational to
 ols\, such as Large Eddy Simulations (LES)\, was used to characterise the 
 propeller’s aerodynamic response and capture the wake evolution. The cro
 ss-flow significantly affects the propeller’s aerodynamic performance\, 
 primarily increasing the time-averaged thrust and torque\, and induces str
 ong asymmetries in the wake structure\, including tilted helicoidal patter
 ns and enhanced three-dimensionality. A low-order model based on momentum 
 balance is additionally proposed to predict the deflection of macro-scale 
 vortical structures\, accurately capturing the main trends observed in hig
 h-fidelity simulations.
 This seminar also explores the aerodynamic effec
 ts of dynamic maneuvers\, such as rapid variations in rotational speed and
  tilt angle\, which often occur during obstacle avoidance or attitude corr
 ections. These maneuvers are computationally expensive to simulate with co
 nventional high-fidelity tools. To overcome this limitation\, ONERA’s vo
 rtex particle solver “VULCAINS” was employed. The solver models the bl
 ades as lifting lines that shed vorticity particles in the induced wake\, 
 providing mesh-free simulations with reduced computational cost\, while pr
 eserving key flow physics. Rapid maneuvers are observed to induce unsteady
  aerodynamic effects that influence the propeller performance and wake str
 ucture\, with faster transients significantly deviating from steady-state 
 conditions and amplifying hysteresis phenomena.
 By integrating experimen
 tal insight with both high- and mid-fidelity numerical methods\, the work 
 presented in this seminar contributes to a more accurate and robust modell
 ing of small-scale rotary-wing aerodynamics in challenging operative condi
 tions. The obtained results aim to inform the design of more efficient\, r
 esponsive\, and reliable propellers in the evolving landscape of unmanned 
 aerial mobility.
 Before registering\, please check our eligibility crite
 ria.
  
LOCATION:Sint-Genesius-Rode\, 1640 Flemish Brabant\, Belgium
DTSTART:20251016T150000Z
DTEND:20251016T160000Z
DTSTAMP:20220307T101637Z
ORGANIZER;CN=VKI Secretariat:MAILTO:secretariat@vki.ac.be
GEO:50.73507;4.396005
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Sint-Genesius-Rode\, 1640 F
 lemish Brabant\, Belgium;X-APPLE-RADIUS=72;X-TITLE=von Karman Institute fo
 r Fluid Dynamics:50.73507;4.396005
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