Validation of aeroacoustic predictions using the heliNOVI database

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dc.contributor.author Pidd, M en
dc.contributor.author Dummel, A en
dc.contributor.author Falchero, D en
dc.contributor.author Genito, M en
dc.contributor.author Prospathopoulos, J en
dc.contributor.author Visingardi, A en
dc.contributor.author Voutsinas, SG en
dc.contributor.author Yin, J en
dc.date.accessioned 2014-03-01T02:51:18Z
dc.date.available 2014-03-01T02:51:18Z
dc.date.issued 2007 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/35456
dc.relation.uri http://www.scopus.com/inward/record.url?eid=2-s2.0-34547611353&partnerID=40&md5=7baf0f4ce538944a29986ca3f3be2db2 en
dc.subject Aeroacoustics en
dc.subject Complete rotorcraft en
dc.subject HeliNOVI en
dc.subject Tail rotor noise validation en
dc.subject.other Accident prevention en
dc.subject.other Acoustics en
dc.subject.other Aerodynamics en
dc.subject.other Computer simulation en
dc.subject.other Database systems en
dc.subject.other Helicopters en
dc.subject.other Mathematical models en
dc.subject.other Rotors en
dc.subject.other Aeroacoustics en
dc.subject.other Complete rotorcraft en
dc.subject.other Tail rotor noise validation en
dc.subject.other Project management en
dc.title Validation of aeroacoustic predictions using the heliNOVI database en
heal.type conferenceItem en
heal.publicationDate 2007 en
heal.abstract The European research project HeliNOVI was aimed at the enhancement of helicopter performance, safety and ride comfort. Within this project one of the principal aims was the study of the aerodynamics and aeroacoustics of the tail rotor in order to reach a deeper knowledge of the phenomena related to it. A key activity was the design of a wind tunnel test employing the existing powered 40%-scaled BO105 helicopter model for the generation of a high-quality database for code validation and assessment of tail rotor noise reduction means and the exploitation of this database for the validation of simulation codes. This validation activity included code-to-code and code-to-test comparisons using the predicted and wind tunnel results. A validation activity for acoustic prediction results from six of the HeliNOVI partners has been performed. The details of the range of partners' methods applied for aircraft trim, wake modelling, aerodynamic and aeroacoustic solutions are described. The numerical/experimental comparisons of the results obtained by the partners show a significant variation in the level of agreement with the HeliNOVI experimental data, but generally capture some of the interaction effects between main and tail rotors. Loading noise often dominates the results and it is found that the trim methodology is crucial to the acoustic prediction. Indeed the large variation in the acoustic predictions is largely due to the variation in the results of the preceding aerodynamic analyses. The HeliNOVI database of experimental and predicted dynamic, aerodynamic and aeroacoustic data provides a valuable asset for further development and validation of acoustic prediction capabilities. en
heal.journalName National Aerospace Laboratory NLR - 32nd European Rotorcraft Forum, ERF 2006 en
dc.identifier.volume 1 en
dc.identifier.spage 112 en
dc.identifier.epage 135 en

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