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Noise of Multirotor Electric Aircraft
Noise of Multirotor Electric Aircraft
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105322
- ISBN
- 9798297666160
- DDC
- 658.404
- 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
- Flight simulation
- 일반주제명
- Microphones
- 일반주제명
- Altitude
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Fluid mechanics
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105322
■006m o d
■007cr#unu||||||||
■020 ▼a9798297666160
■035 ▼a(MiAaPQ)AAI32289580
■035 ▼a(MiAaPQ)PennState22433bxm437
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a658.404
■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.


