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24 Jun 2008 ... Institute of Sound and Vibration Research. University of Southampton. Advanced open rotor noise prediction methods. Michael Kingan, ISVR ...

http://www.omega.mmu.ac.uk/Open-Rotor-Workshop-24-June/Noise prediction methods.pdf

5.1 Advanced open rotor noise prediction methods. 29. 5.2 Auralisation. 29. 5.3 Aircraft Conceptual Design and Noise. 29. 6.0 Gaps in Knowledge ...

http://www.omega.mmu.ac.uk/Downloads/Final-Reports/36 Final Report AOR.pdf

noise standards of today to reduce community impact. In this paper we review the open rotor noise prediction methods available at NASA Langley. ...

http://pdf.aiaa.org/preview/CDReadyMAERO09_2131/PV2009_3133.pdf

Obtain Baseline Open Rotor noise for. 2008 Advanced Design Technology. • Investigate installation and AOA effects on performance and noise ...

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090007807_2009006949.pdf

level compared to previous NASA noise program goals. The current. Open Rotor propulsion research activity at NASA and GE are discussed ...

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090007808_2009006948.pdf

26 Jun 2008 ... Low noise solution through low PR fans. Nacelle weight and drag remain. No gearbox if contra-rotating LP turbine. Propfan / Open Rotor ...

http://www.midlandsaerospace.org.uk/cgi-bin/maa/SISite/data/files/Nick Peacock no.2.pdf

Capable of booster configuration. Open Rotor. Game-changing. SFC. Core configuration flexible. High speed gearbox. Low noise through blade design ...

http://www.midlandsaerospace.org.uk/cgi-bin/maa/SISite/data/files/documents/5 July 2007 Rolls-Royce.pdf

SP3 – Direct Drive Open Rotor. Open Rotor engine brings significant fuel burn and CO2 reduction. The challenge is to reach a noise level better than ICAO ...

http://www.ecare-sme.org/plus/download/10_DREAM.pdf

aircraft configurations; b) development of new computational methods for flow generated noise associated with aircraft/open rotor noise, c) development of ...

http://www.persistence.nl/xnoise/fileadmin/user_upload/Positions/ANTC_SES-71-111_EngD_Aircraft_aerodynamics_and_aeroacoustics.pdf

12 Dec 2007 ... to address fan noise, CR Open Rotor noise, core noise, jet noise and airframe noise. OPENAIR. Page 8. OPENAIR. Page 8 ...

http://www.aerosme.com/download/WorkshopFP7Call2/Presentations/09_Kors_OPENAIR_AeroSMEWorkshop.pdf

by F Farassat - 1987 - Cited by 45

http://www.cs.odu.edu/~mln/ltrs-pdfs/NASA-87-ahs-ff.pdf

12 Sep 2007 ... and greatly reduced noise. ● Open rotors with modern aerodynamic design offer potential for significant fuel savings ...

http://www.dlr.de/pa/Portaldata/33/Resources/dokumente/ceas/CEAS_WS_Arndt.pdf

24 Apr 2009 ... noise impact via new technology + improved operational practices (e.g. CDAs). Challenges remain. – Emerging technologies (e.g. open rotor ...

http://www.hkie-mmnc.org/Conference2009/Download/Presentation/Aviation & the Environment-Addressing the Technology Challenge.pdf

The directivities of the sound field radiated by an open rotor ... A code for the solution of the 2D LEE's and the rotor noise equations using a ...

http://www.springerlink.com/index/U0962L2537811866.pdf

both subsonic and supersonic open rotor noise. It is a robust method requiring only low additional computational effort in comparison to the flow ...

http://www.springerlink.com/index/6447772825017753.pdf

5 Feb 2008 ... and, so, enhance HLD low-noise design of LE gapless solutions ... >Slow Open Rotor. >Fast Open Rotor (CROR). >Advanced Turbofan ...

http://www.cleansky.eu/upload/download/16/en/GreenRegionalAircraftITDAchilleCarbone(AleniaAeronautica).pdf

5 Feb 2008 ... Technology. New Engine. Concepts. (i.e. Open Rotor). Mission &. Trajectory. Management. Aircraft Energy. Management. CO2. ~12 to 20%. Noise ...

http://www.cleansky.eu/upload/download/19/en/EngineITDNickPeacock(Rolls-Royce).pdf

12 Jan 2010 ... Open Rotor Noise Impact to Airport Communities. Annoyance survey catalog update. Air Tour Management Plans (ATMP)-funded noise research ...

http://www.trbav030.org/pdf2010/Girvin_R_Mitigation_research.pdf

Noise level will vary according to material type being processed and the granulator configuration ... OPTIONAL OPEN ROTOR with scissor-cutting, slant knives ...

http://www.conairnet.com/product/documents/Granulation spec sheets/CHS Granulators.pdf

and reduces noise and energy consumption. ■ Safe, easy access. Hinged components provide easy .... Standard 3-blade open rotor Optional 9-blade open rotor ...

http://www.conairnet.com/product/documents/Granulation spec sheets/CD Granulators.pdf

craft engine noise and CO2 emissions, the program is exploring a number of con- cepts involving an open-rotor engine. Snecma is leading a consortium of 53 ...

http://www.aiaa.org/Aerospace/images/articleimages/pdf/International Beat1.pdf

by K Delaere - Cited by 3

http://www.esat.kuleuven.be/electa/publications/fulltexts/pub_948.pdf

by K Delaere - 2003 - Cited by 3

http://www.esat.kuleuven.be/electa/publications/fulltexts/pub_1058.pdf

28 Sep 2009 ... Open rotor engine. Knowledge on noise characteristics and ... State of the art Generic Open Rotor. Noise Prediction Tool has been ...

http://www.icas.org/mediagalleri/press/A. POLL Omega presentation on ICAS 2009 Workshop.pdf

Reduce the NO x by 80%. - Reduce perceived external noise by 50% ... Open rotor, BPR>35. Today, typically, at cruise 1kg of kerosene produces: ...

http://www.airtn.eu/documents/AirTN/Joyce_UK_BERR_slides.pdf

5 blade open rotor is designed for higher output applications like film and small parts. ... consumption, frictional heat and noise. Adjustable rotating ...

http://www.imscompany.com/pdf/786-787.pdf

4Parallel path trading Noise vs Fuel Burn / CO2 with Open Rotor. [26% Fuel burn improvement … 2018 + EIS]. CFM International Proprietary Information subject ...

http://www.gifas.aero/reaxia_files/Snecma_LesmoteursduFutur_partie1_27avril2009.pdf

LP & HP System. Technology. New Engine. Concepts. (i.e. Open Rotor). Mission &. Trajectory. Management. Aircraft Energy. Management. CO2. ~12 to 20%. Noise ...

http://www.tpa.lt/7BP/JTI/files/JTI-Clean-Sky_Brusati_11-June-2008[1].pdf

noise from an open rotor', AIAA-2004–3038, Presented at the 10th AIAA/CEAS Aeroacoustics. Conference, Manchester, Great Britain.

http://inderscience.metapress.com/index/3U1251U721314074.pdf

by C Tam - 1999 - Cited by 14

http://web.math.fsu.edu/~smith/CAAwbp99/caawbp99.pdf

10 Jun 2009 ... Open rotor engine example. Drivers and conflicts – reduce CO2 –v- lower noise. Knowledge on noise characteristics and effects around ...

http://www.psych.lse.ac.uk/complexity/events/2009/ESRCSeminar3CranfieldOmega-GardnerThomasPoll.pdf

4 Jan 2010 ... Open Rotor reduced noise while maintaining high propulsive efficiency. • Ducted UHB nacelle weight & drag with increasing diameter ...

http://www.aeronautics.nasa.gov/pdf/asm_2010_heidmann v4x_508.pdf

18 Feb 2010 ... Asked about the possibility of choosing an open rotor design for future ... due to the large diameter of the rotors), increased noise and ...

http://www.pw.utc.com/StaticFiles/Pratt & Whitney New/Products/Commercial/1 Static Files/wing-daily-02-18-10-e.pdf

However, in this raw form, it is difficult to assess the effects of having closed rotor slots compared to open rotor slots. Classical noise analysis ...

http://ieeexplore.ieee.org/iel3/1175/6459/00253617.pdf?arnumber=253617

by X Huang - Cited by 3

http://eprints.soton.ac.uk/46232/01/A_fourier_pseudospectral_method_for_some_computational_aeroacoustics_problems.pdf

investigating the noise from rotating blades of open rotors. 1.1 Helicopter rotor noise. In the present generation of turbine powered helicopters, ...

http://eprints.soton.ac.uk/52188/01/000535.PDF

tor. During the test, as the rotor is turned, “feel” for cogging and listen for an increase in electrical noise. These are also indicators of an open rotor. ...

http://www.pumpingmachinery.com/pump_magazine/pump_articles/article_29/rotortesting.pdf

noise by 10 to 15 EPNdB over current-generation aircraft. “open rotor” type concepts could also reduce noise by 5 to 10 EPNdB versus current ...

http://www.snecma.com/IMG/pdf/Brochure_Environment_June_2009.pdf

CLAIRE versus Open Rotor. ACARE-Goal -18dB. ** R = Recuperator. * Counter-Rotating Integrated Shrouded Propfan. Disadvantages: • Noise emission just as with ...

http://www.mtu.de/en/technologies/claire/PK_Klima_18-07-2007_Martens_en.pdf

Compared to the fan noise model developed previously by ... open rotor) will be possible using the model described hereafter. 2.1 Structure of the tool ...

http://intellagence.eu.com/acoustics2008/acoustics2008/cd1/data/articles/001083.pdf

mainly devoted to fuel consumption/CO2 reduction, whilst retaining acceptable noise levels: • Develop contra-rotating open rotors with variable pitch ...

http://ec.europa.eu/research/transport/pdf/newac_workshop_brochure_en.pdf

Schematic of SP2 Geared. Open-Rotor Engine. • Specification of the contra-rotating architecture and test facilities to study aerodynamics and noise. ...

http://www.newac.eu/uploads/media/DREAM_project_overview_presentation_D.Bone.pdf

SAGE ITD – SAGE1, Geared Open Rotor. ❖Led by Rolls-Royce plc. ❖Affiliates and Associates ... Noise optimised configuration. Contra rotating propellers ...

http://www.newac.eu/uploads/media/Clean_Sky_SAGE_ITD_presentation_M.Pacey.pdf

Noise related to counter-rotating, open rotor propfans. • Advanced diagnostics and measurement techniques. It is the intention of the Aeroacoustics Research ...

http://www.oai.org/aeroacoustics/Guidelines.pdf

Direct Drive Open Rotor. Large 3-shaft Turbofan. Geared Turbofan. Turboshaft. S. A. G. E. 5. SAGE 1. SAGE 2. S. A. G. E. 3. SAGE 4. Emissions Noise Weight ...

http://www.eurosfaire.prd.fr/7pc/documents/1253191099_6ce_clean_sky_info_days_paris.pdf

UHB Open Rotor Tests (Planning Phase Currently). Partner = GE Aviation. Airframe and engine noise tests. Partner = Gulfstream and Honeywell ...

http://www.aeronautics.nasa.gov.page-archive.org/fap/PowerPoints/SFW_Overview_10.5.08.pdf

Open rotor design development for lower noise and emissions. • Other technologies need to be progressed through to technology ready point before ...

http://www.southperth.wa.gov.au/Documents/Our-Council/Minutes-and-Agendas/2009/November/Attachment851.pdf

improvements in noise and pollution emissions, their existing limita- .... Open Rotor. Other Innovative. Engine Concepts. Engine/. Component ...

http://www.newac.org/uploads/media/NEWAC_Broschure_01.pdf

noise decreases, and the relative noise contribution of the low-pressure turbine increases. ... counter rotating Open Rotor engine, with the task ...

http://www.aviogroup.com/files/download/24/richerca_sviluppo.pdf

Reduction in Noise, Emissions, Fuel burn, Maintenance & System. Complexity/Cost. ... OK go on with open rotor. TWO SHAFT A/C ENGINE. WP 5. TURBOSHAFT ENGINE ...

http://www.bmvit.gv.at/service/luftfahrtkonferenz/tag1/panel5/rollsroyce.pdf