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Noise of Multirotor Electric Aircraft
Noise of Multirotor Electric Aircraft
Noise of Multirotor Electric Aircraft

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자료유형  
 학위논문 서양
최종처리일시  
20260202105322
ISBN  
9798297666160
DDC  
658.404
저자명  
Mukherjee, Bhaskar.
서명/저자  
Noise of Multirotor Electric Aircraft
발행사항  
[Sl] : The Pennsylvania State University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
226 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Brentner, Kenneth S.
학위논문주기  
Thesis (Ph.D.)--The Pennsylvania State University, 2025.
초록/해제  
요약Advanced Air Mobility (AAM) aircraft are expected to operate close to humans, which poses a significant challenge in commercialization, as noise levels need to be acceptable to the community. High-frequency broadband noise generated by blades interacting with flow turbulence is expected to be important, as individual rotor tip speeds and disk loading are lower. The challenge of predicting noise for such multirotor aircraft can build on previous experience with helicopter noise prediction, which demonstrated the need to account for complex transient aerodynamics and aircraft motions inherent in maneuvers.This dissertation introduces the Penn State Noise Prediction System (PSU-NPS) developed by coupling three existing computational tools: PSUDEPSim to calculate aircraft and rotor states, CHARM free-wake code to resolve mid-fidelity airloads, and PSU-WOPWOP to predict noise levels. Lift-plus-cruise multirotor aircraft flight simulation of maneuvers such as level turn, and transition from hover to cruise showed that deterministic and broadband (self) noise were dependent on combined and not individual rotor thrust levels. Blade stall was found to increase noise levels by 10 dBA if not controlled. A mitigation strategy used a performance sweep of an individual rotor to identify rotor operating setpoints (speed, pitch) suitable for different airspeeds. A first-principle tool, PSU-MulTINoise (Multibody Turbulent Ingestion Noise) was developed that rapidly calculates turbulence induced airloads for predicting broadband noise using PSU-WOPWOP in the time-domain. The tool was validated against the measured noise from isolated airfoil operating in isotropic turbulence and rotor blade-wake interactions (BWI). Investigation of atmospheric boundary layer turbulence ingestion noise using PSU-MulTINoise showed that it is more important for AAM aircraft than for helicopters, with terrain roughness being an important parameter. The Brooks, Pope, and Marcolini (BPM) self-noise model was corrected for acoustic non-compactness, thus reducing error from noise prediction of small rotor blades used in uncrewed aerial vehicles (UAVs) by 10 dBA. Finally, a derivation of the semi-empirical Pegg broadband noise prediction model for helicopters revealed an approach to tuning it for AAM aircraft. Helicopter noise predictions from the model in PSU-WOPWOP were improved when an error in implementation was found to result in an overprediction of up to 13 dB.
일반주제명  
Schedules
일반주제명  
Aircraft
일반주제명  
Aviation
일반주제명  
Flow velocity
일반주제명  
Acoustics
일반주제명  
Atmospheric boundary layer
일반주제명  
Flight simulation
일반주제명  
Microphones
일반주제명  
Altitude
일반주제명  
Atmospheric sciences
일반주제명  
Fluid mechanics
기타저자  
The Pennsylvania State University.
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aMukherjee,  Bhaskar.
■24510▼aNoise  of  Multirotor  Electric  Aircraft
■260    ▼a[Sl]▼bThe  Pennsylvania  State  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a226  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Brentner,  Kenneth  S.
■5021  ▼aThesis  (Ph.D.)--The  Pennsylvania  State  University,  2025.
■520    ▼aAdvanced  Air  Mobility  (AAM)  aircraft  are  expected  to  operate  close  to  humans,  which  poses  a  significant  challenge  in  commercialization,  as  noise  levels  need  to  be  acceptable  to  the  community.  High-frequency  broadband  noise  generated  by  blades  interacting  with  flow  turbulence  is  expected  to  be  important,  as  individual  rotor  tip  speeds  and  disk  loading  are  lower.  The  challenge  of  predicting  noise  for  such  multirotor  aircraft  can  build  on  previous  experience  with  helicopter  noise  prediction,  which  demonstrated  the  need  to  account  for  complex  transient  aerodynamics  and  aircraft  motions  inherent  in  maneuvers.This  dissertation  introduces  the  Penn  State  Noise  Prediction  System  (PSU-NPS)  developed  by  coupling  three  existing  computational  tools:  PSUDEPSim  to  calculate  aircraft  and  rotor  states,  CHARM  free-wake  code  to  resolve  mid-fidelity  airloads,  and  PSU-WOPWOP  to  predict  noise  levels.  Lift-plus-cruise  multirotor  aircraft  flight  simulation  of  maneuvers  such  as  level  turn,  and  transition  from  hover  to  cruise  showed  that  deterministic  and  broadband  (self)  noise  were  dependent  on  combined  and  not  individual  rotor  thrust  levels.  Blade  stall  was  found  to  increase  noise  levels  by  10  dBA  if  not  controlled.  A  mitigation  strategy  used  a  performance  sweep  of  an  individual  rotor  to  identify  rotor  operating  setpoints  (speed,  pitch)  suitable  for  different  airspeeds.  A  first-principle  tool,  PSU-MulTINoise  (Multibody  Turbulent  Ingestion  Noise)  was  developed  that  rapidly  calculates  turbulence  induced  airloads  for  predicting  broadband  noise  using  PSU-WOPWOP  in  the  time-domain.  The  tool  was  validated  against  the  measured  noise  from  isolated  airfoil  operating  in  isotropic  turbulence  and  rotor  blade-wake  interactions  (BWI).  Investigation  of  atmospheric  boundary  layer  turbulence  ingestion  noise  using  PSU-MulTINoise  showed  that  it  is  more  important  for  AAM  aircraft  than  for  helicopters,  with  terrain  roughness  being  an  important  parameter.  The  Brooks,  Pope,  and  Marcolini  (BPM)  self-noise  model  was  corrected  for  acoustic  non-compactness,  thus  reducing  error  from  noise  prediction  of  small  rotor  blades  used  in  uncrewed  aerial  vehicles  (UAVs)  by  10  dBA.  Finally,  a  derivation  of  the  semi-empirical  Pegg  broadband  noise  prediction  model  for  helicopters  revealed  an  approach  to  tuning  it  for  AAM  aircraft.  Helicopter  noise  predictions  from  the  model  in  PSU-WOPWOP  were  improved  when  an  error  in  implementation  was  found  to  result  in  an  overprediction  of  up  to  13  dB.
■590    ▼aSchool  code:  0176.
■650  4▼aSchedules
■650  4▼aAircraft
■650  4▼aAviation
■650  4▼aFlow  velocity
■650  4▼aAcoustics
■650  4▼aAtmospheric  boundary  layer
■650  4▼aFlight  simulation
■650  4▼aMicrophones
■650  4▼aAltitude
■650  4▼aAtmospheric  sciences
■650  4▼aFluid  mechanics
■690    ▼a0986
■690    ▼a0725
■690    ▼a0204
■71020▼aThe  Pennsylvania  State  University.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0176
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360206▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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