Analysis of tail rotor noise reduction benefits using helinovi aeroacoustic main/tail rotor test and post-test prediction results

Yin, J; Dummel, A; Falchero, D; Pidd, M; Prospathopoulos, J; Visingardi, A; Voutsinas, SG

dc.contributor.author	Yin, J	en
dc.contributor.author	Dummel, A	en
dc.contributor.author	Falchero, D	en
dc.contributor.author	Pidd, M	en
dc.contributor.author	Prospathopoulos, J	en
dc.contributor.author	Visingardi, A	en
dc.contributor.author	Voutsinas, SG	en
dc.date.accessioned	2014-03-01T02:51:02Z
dc.date.available	2014-03-01T02:51:02Z
dc.date.issued	2007	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35318
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-34547575676&partnerID=40&md5=ff20f669f97ecff028180450c33b1f4f	en
dc.subject	Helicopter tail rotor noise reduction	en
dc.subject	HELINOVI aeroacoustic test	en
dc.subject	Main/tail rotor interaction	en
dc.subject	Numerical simulation	en
dc.subject.other	Aerodynamics	en
dc.subject.other	Computer simulation	en
dc.subject.other	Helicopter rotors	en
dc.subject.other	Project management	en
dc.subject.other	Vibration control	en
dc.subject.other	Helicopter tail rotor noise reduction	en
dc.subject.other	HELINOVI aeroacoustic tests	en
dc.subject.other	Main/tail rotor interaction	en
dc.subject.other	Vibration reduction	en
dc.subject.other	Noise abatement	en
dc.title	Analysis of tail rotor noise reduction benefits using helinovi aeroacoustic main/tail rotor test and post-test prediction results	en
heal.type	conferenceItem	en
heal.publicationDate	2007	en
heal.abstract	The EU HeliNOVI project was designed to improve the understanding of Tail Rotor (TR) noise reduction and vibration reduction technology by means of a comprehensive investigation of Main Rotor (MR)/TR interaction noise and rotor induced vibrations through both theory and experiment. Several tail rotor noise reduction techniques were investigated both through wind tunnel testing and through simulations. The investigation included tip speed reduction, the sense of TR rotational direction and different TR rotor position. Both the test and simulation results indicate that tail rotor noise is most important for climb and high-speed level flight. The analysis of the tail rotor noise reduction benefits from test and simulation results show that besides a reduction of rotor tip speed, the most efficient tail rotor noise reduction concept consists in changing the tail rotor sense of rotation from 'Advancing Side Down-ASD' to 'Advancing Side Up-ASU'. In addition, the noise reduction for new TR position is mainly due to increasing the advancing blade distance rather than changing TR aerodynamic behavior.	en
heal.journalName	National Aerospace Laboratory NLR - 32nd European Rotorcraft Forum, ERF 2006	en
dc.identifier.volume	1	en
dc.identifier.spage	159	en
dc.identifier.epage	181	en