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dc.contributor.authorBlunt, D.
dc.contributor.authorJones, Adrian
dc.contributor.authorMewett, D.
dc.date.accessioned2017-04-28T13:59:57Z
dc.date.available2017-04-28T13:59:57Z
dc.date.created2017-04-28T09:06:12Z
dc.date.issued2014
dc.identifier.citationBlunt, D. and Jones, A. and Mewett, D. 2014. Adapting a propeller noise model for aircraft at cruising altitudes.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/52806
dc.description.abstract

An existing propeller harmonic noise model is adapted to incorporate the effects of a stratified atmosphere so that predictions can be made of the ground-level noise for an aircraft flying at cruising altitudes. Specifically, the speed of sound and the atmospheric absorption are both made functions of altitude. The effects of refraction and ground reflection are examined, but deemed small enough to exclude from the initial model adaptation. The adapted model is applied to long-range acoustic data for a turboprop aircraft at three different cruising altitudes. The results show that a relatively good fit can be found between the model and the experimental data at the Doppler-shifted blade passing frequency within a range of source radiation angles from 30° to 110° with respect to the aircraft's direction of travel. The results also highlight the influence of molecular oxygen on the atmospheric absorption of the propeller harmonics. Recommendations are made for further improvements to the model.

dc.titleAdapting a propeller noise model for aircraft at cruising altitudes
dc.typeConference Paper
dcterms.source.titleINTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
dcterms.source.seriesINTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control
dcterms.source.isbn9780909882037
curtin.departmentCentre for Marine Science and Technology
curtin.accessStatusFulltext not available


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