Characteristics of Propeller Noise on an Aircraft Fuselage

Barton, Cheryl; Mixson, J. S.

doi:10.2514/3.57483

Cited by 5 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some components of the interior acoustic field are the result of mechanical forces acting on distant regions of the airframe. The resulting vibrational energy is transmitted through the structure and then radiated into the fuselage interior as noise [12]. The external acoustic measurements and analysis carried out on board of the tiltrotor also show that the acoustic radiation from the engine inlet did not generate sufficiently high sound pressure levels to be dominant source and the broadband SBN has not been identified, probably because of masking by broadband airborne noise.…”

Section: Flight Test Set-upmentioning

confidence: 99%

“…The acoustic loads produced by the propeller is mostly affected by the power produced, forward and rotational tip speeds, number of blades, blade shape and thickness and distance from the propeller. Propeller engines generate a noise field that is highly tonal in frequency content and highly directional in spatial distribution [12][13][14]. In high-speed flight, boundary layer noise can be a significant part of the noise perceived in the cabin.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tiltrotor Acoustic Data Acquisition and Analysis

Marano

Polito

Guida

et al. 2021

Aerotec. Missili Spaz.

View full text Add to dashboard Cite

Pressure load measurements in operative conditions represent a fundamental parameter for improving the knowledge of the in-flight forcing generation and transmission. Furthermore, it is a fundamental step for assessing the validity and confidence of numerical methods able to predict such pressure loads, usually generated by propulsion and turbulent boundary layer. The experimental in-flight measurements and analysis and the correlation with the numerical methods are activities required as a starting point for studying the transmission mechanism through the fuselage which is responsible for the vibration and noise level which can be measured inside and for identifying potential solutions for their mitigation. The in-flight measurements have been carried out on a Leonardo Helicopter tiltrotor with the main goals to perform the validation of an experimental setup in a fully new environment and the assessment of a data analysis procedure according to the objectives of the Clean Sky 2 Fast Rotorcraft Project T-WING (CS2, Clean Sky 2 joint undertaking third amended bi-annual work plan and budget, 2018–2019).

show abstract

Section: Flight Test Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%