Comparative Concept Study and Evaluation for New Broadband Noise Absorbing Acoustic Liner Concepts for Civil Aviation

Mischke, Marcel; Kazula, Stefan; Höschler, Klaus

doi:10.33737/gpps19-tc-046

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…Additionally, it is segmented over the circumference to enable the adjustment of entry area and lip thickness. As conventional rigid acoustic liners would prevent the contour adjustment, either acoustic liners with flexible walls (Mischke et al, 2019) or sound cancellation by counter-noise (Virginia Tech Intellectual Properties, 2020) should be considered as noise attenuation options. A potential ice protection system for this inlet concept group must cover approximately the same area as for a conventional rigid pitot inlet, which usually only protects the inlet lip.…”

Section: Elastic Surface Deformationmentioning

confidence: 99%

Evaluation of variable pitot inlet concepts for transonic and supersonic civil aviation

Kazula

Höschler

2020

AEAT

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Purpose This paper aims to describe the selection of the ideal variable inlet concept group by using results of aerodynamic investigations, system safety analyses and integration studies. Design/methodology/approach Aerodynamic and functional inlet requirements are explained and variable inlet concept groups are introduced. The concept evaluation by means of a weighted point rating is presented. The respective concept groups are analysed and evaluated regarding economic, functional and safety requirements. Findings By means of this evaluation, the concept group that adjusts the inlet geometry by rigid segment repositioning is identified as most suitable concept group. Originality/value The early selection of the most suitable concept group enables more detailed subsequent concept investigations, potentially enabling the technology of variable inlets for future commercial aircraft.

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Section: Elastic Surface Deformationmentioning

confidence: 99%

Evaluation of variable pitot inlet concepts for transonic and supersonic civil aviation

Kazula

Höschler

2020

AEAT

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“…The functional analysis according to ARP 4754 [06] does not provide a direct transfer of the function into a system architecture. This deductive method of the ARP 4754 [06] has been enhanced by Mischke et al [12], where a system architecture is defined…”

Section: System Function and System Architecturementioning

confidence: 99%

“…A first topological and geometric concept for the flexible broadband liner concepts can be derived through the functional structure according to ARP 4754 [06] that has been extended by sub-system components [07], [12], [13]. Figure 1a presents a state of the art narrowband acoustic liner utilizing a sandwich design with a rigid honeycomb core (SHR-Liner; Standard Helmholtz Resonator Liner).…”

Section: Broadband Liner Conceptsmentioning

confidence: 99%

Preliminary safety Assessment on System Design Level for Broadband Acoustic Liner Concepts for Aviation

2019

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Selected methods of the aviation safety assessment process according to ARP 4761 are introduced and conducted within the scope of a concept study for future broadband acoustic liners. While having similar primary functions and basic design, the acoustic liner concepts diverge concerning subfunctions and potential malfunctions. With the ARP 4761 safety assessment methods, significant differences in sub functions and possible malfunctions of the concepts can be identified. The results of the safety assessment are discussed, and the concepts are evaluated in terms of feasibility and safety.

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“…The inlet lip of this concept group should be made of aluminium to withstand external loads. As conventional rigid acoustic liners would prevent the contour adjustment, either acoustic liners with flexible walls [20] or sound cancellation by counter-noise [21] should be considered as noise attenuation options. A potential ice protection system for this inlet concept group must cover approximately the same area as for a conventional rigid pitot inlet, which usually only protects the inlet lip.…”

Section: Elastic Surface Deformationmentioning

confidence: 99%

Evaluation of Variable Pitot Inlet Concepts for Transonic and Supersonic Civil Aviation

et al. 2019

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This paper describes the selection of the ideal variable inlet concept group by utilising results of aerodynamic investigations, system safety analyses and integration studies. Aerodynamic and functional inlet requirements are explained, and variable inlet concept groups are introduced. The concept evaluation by means of a weighted point rating is presented. The respective concept groups are analysed and evaluated regarding economic, functional and safety requirements. By means of this evaluation, the concept group that adjusts the inlet geometry by rigid segment repositioning is identified as most suitable concept group. The early selection of the most suitable concept group enables more detailed subsequent concept investigations, potentially enabling the technology of variable inlets for future commercial aircraft.

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Comparative Concept Study and Evaluation for New Broadband Noise Absorbing Acoustic Liner Concepts for Civil Aviation

Cited by 4 publications

References 16 publications

Evaluation of variable pitot inlet concepts for transonic and supersonic civil aviation

Evaluation of variable pitot inlet concepts for transonic and supersonic civil aviation

Preliminary safety Assessment on System Design Level for Broadband Acoustic Liner Concepts for Aviation

Evaluation of Variable Pitot Inlet Concepts for Transonic and Supersonic Civil Aviation

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