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Flow-Interactive Control of a Flexible Wing Using Aerodynamic Distributed Bleed Actuation
Flow-Interactive Control of a Flexible Wing Using Aerodynamic Distributed Bleed Actuation
Flow-Interactive Control of a Flexible Wing Using Aerodynamic Distributed Bleed Actuation

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105520
ISBN  
9798263343354
DDC  
330
저자명  
Du Charlat, Gabriel Peyredieu.
서명/저자  
Flow-Interactive Control of a Flexible Wing Using Aerodynamic Distributed Bleed Actuation
발행사항  
[Sl] : Georgia Institute of Technology, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
141 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Glezer, Ari.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
초록/해제  
요약Controlled interactions between a 3-D flexible wing model and the embedding cross flow were explored in wind tunnel investigations for effecting tunable structural and aeroelastic characteristics by exploiting regulation of the aerodynamic loadsthat are effected by fluidic actuation. The aerodynamic loads are regulated using distributed autonomous air bleed that is driven through surface ports and the wing's inner structure by pressure differences between its pressure and suction surfaces and is regulated by surface louvers. Assessment of the control authority of time invariant bleed showed that prescribed decrements of the aerodynamic loads could be varied bi-directionally relative to a prescribed operating point by regulating the surface porosity of the actuation. The physical mechanism by which distributed bleed affects the aerodynamic loads was investigated using planar and stereo PIV measurements and it was demonstrated that time-invariant bleed affects the balance of CW and CCW streamwise vorticity in the near wake leading to variation in the sectional circulation that is associated with a decrease or increase in spanwise loading. It was also shown that spanwise-compact bleed actuation can induce spanwise-limited changes in sectional load distributions that can be exploited for spatial modifications of the wing's apparent structural characteristics. This form of local bleed control can lead to buffering of three-dimensional flow effects along the span including local attachment and variation of the spanwise flow. While the wing's response to temporal (top-hat) bleed actuation is 106\uD835\uDF0F\uD835\uDC50\uD835\uDC5C\uD835\uDC5B\uD835\uDC63, the shorter characteristic response time of the circulation (8.2\uD835\uDF0F\uD835\uDC50\uD835\uDC5C\uD835\uDC5B\uD835\uDC63) points to reasonably broad band control. Furthermore, it was shown that circulation computed from streamwise vorticity distributions in the near wake is a viable surrogate for tracking unsteady load variations during actuation. The utility of regulated bleed-induced spanwise load distributions for aerodynamic structural control was demonstrated by the suppression of deliberate planform vibrations using real time feedback control. It was shown that up to 70% reduction in RMS wing tip oscillation was achieved along with comparable reductions in associated oscillations of the aerodynamic loads and moment with minimal penalties in lift and drag. These findings indicate that fast spanwise-inboard bleed-induced temporal changes in the spanwise load distributions over the wing that can be exploited for spatial modifications of its apparent structural characteristics and thereby control its aeroelastic characteristics for flutter or gust alleviation.
일반주제명  
Aircraft
일반주제명  
Investigations
일반주제명  
Deformation
일반주제명  
Aerodynamics
일반주제명  
Controllers
일반주제명  
Aerospace engineering
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■035    ▼a(MiAaPQ)GeorgiaTech76985
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■0820  ▼a330
■1001  ▼aDu  Charlat,  Gabriel  Peyredieu.
■24510▼aFlow-Interactive  Control  of  a  Flexible  Wing  Using  Aerodynamic  Distributed  Bleed  Actuation
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a141  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Glezer,  Ari.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2024.
■520    ▼aControlled  interactions  between  a  3-D  flexible  wing  model  and  the  embedding  cross  flow  were  explored  in  wind  tunnel  investigations  for  effecting  tunable  structural  and  aeroelastic  characteristics  by  exploiting  regulation  of  the  aerodynamic  loadsthat  are  effected  by  fluidic  actuation.  The  aerodynamic  loads  are  regulated  using  distributed  autonomous  air  bleed  that  is  driven  through  surface  ports  and  the  wing's  inner  structure  by  pressure  differences  between  its  pressure  and  suction  surfaces  and  is  regulated  by  surface  louvers.  Assessment  of  the  control  authority  of  time  invariant  bleed  showed  that  prescribed  decrements  of  the  aerodynamic  loads  could  be  varied  bi-directionally  relative  to  a  prescribed  operating  point  by  regulating  the  surface  porosity  of  the  actuation.  The  physical  mechanism  by  which  distributed  bleed  affects  the  aerodynamic  loads  was  investigated  using  planar  and  stereo  PIV  measurements  and  it  was  demonstrated  that  time-invariant  bleed  affects  the  balance  of  CW  and  CCW  streamwise  vorticity  in  the  near  wake  leading  to  variation  in  the  sectional  circulation  that  is  associated  with  a  decrease  or  increase  in  spanwise  loading.  It  was  also  shown  that  spanwise-compact  bleed  actuation  can  induce  spanwise-limited  changes  in  sectional  load  distributions  that  can  be  exploited  for  spatial  modifications  of  the  wing's  apparent  structural  characteristics.  This  form  of  local  bleed  control  can  lead  to  buffering  of  three-dimensional  flow  effects  along  the  span  including  local  attachment  and  variation  of  the  spanwise  flow.  While  the  wing's  response  to  temporal  (top-hat)  bleed  actuation  is  106\uD835\uDF0F\uD835\uDC50\uD835\uDC5C\uD835\uDC5B\uD835\uDC63,  the  shorter  characteristic  response  time  of  the  circulation  (8.2\uD835\uDF0F\uD835\uDC50\uD835\uDC5C\uD835\uDC5B\uD835\uDC63)  points  to  reasonably  broad  band  control.  Furthermore,  it  was  shown  that  circulation  computed  from  streamwise  vorticity  distributions  in  the  near  wake  is  a  viable  surrogate  for  tracking  unsteady  load  variations  during  actuation.  The  utility  of  regulated  bleed-induced  spanwise  load  distributions  for  aerodynamic  structural  control  was  demonstrated  by  the  suppression  of  deliberate  planform  vibrations  using  real  time  feedback  control.  It  was  shown  that  up  to  70%  reduction  in  RMS  wing  tip  oscillation  was  achieved  along  with  comparable  reductions  in  associated  oscillations  of  the  aerodynamic  loads  and  moment  with  minimal  penalties  in  lift  and  drag.  These  findings  indicate  that  fast  spanwise-inboard  bleed-induced  temporal  changes  in  the  spanwise  load  distributions  over  the  wing  that  can  be  exploited  for  spatial  modifications  of  its  apparent  structural  characteristics  and  thereby  control  its  aeroelastic  characteristics  for  flutter  or  gust  alleviation.
■590    ▼aSchool  code:  0078.
■650  4▼aAircraft
■650  4▼aInvestigations
■650  4▼aDeformation
■650  4▼aAerodynamics
■650  4▼aControllers
■650  4▼aAerospace  engineering
■690    ▼a0538
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360408▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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