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Doc 9943. Edition 1
Last modified:1/1/2010
Report to CAEP by the CAEP Noise Technology Independent Expert Panel. Aircraft Noise Technology Review and Medium and Long Term Noise Reduction Goals. Report (English-only publication)
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Page 1 of 106 ICAO COMMITTEE ON AVIATION ENVIRONMENTAL PROTECTION Report to CAEP by the CAEP Noise Technology Independent Expert Panel Revised March 2010 Aircraft Noise Technology Review and Medium and Long Term Noise Reduction Goals Authors Philip R. Gliebe US Jean Beslon France Wajid Chishty Canada Dennis L. Huff US Hirokazu Ishii Japan Yuri Khaletskiy Russia Brian J. Tester UK
Page 2 of 106 Table of Contents Table of Contents ........................................................................................................... 2 1. Executive Summary ................................................................................................... 4 1.1 Introduction .............................................................................................................. 4 1.2 Background ...................................................................................................... 5 1.3 Remit ................................................................................................................ 5 1.4 Aircraft Category Selection and Considerations.............................................. 6 1.5 Selection of Reference Aircraft ....................................................................... 7 1.6 Pilot Studies ..................................................................................................... 8 1.7 Conclusions Recommendations ................................................................... 8 1.7.1 Mid Term Year 2018 ................................................................................. 9 1.7.2 Long Term Year 2028 .............................................................................. 12 1.7.3 Noise Reduction Benefit Goal Uncertainty ................................................ 12 1.7.4 Final Noise Reduction Goal Recommendations Summary ........................ 13 1.7.5 Noise Abatement Operational Procedures Goal Benefits ........................... 15 2. Introduction .............................................................................................................. 19 2.1 Background .................................................................................................... 19 2.2 Remit .............................................................................................................. 19 2.3 Conduct of the IE Review .............................................................................. 19 2.4 Terms of Reference ........................................................................................ 20 2.5 Additional Guidance ...................................................................................... 20 3. Scope of report ......................................................................................................... 21 3.1 IEP Report Preparation Preliminary Work .................................................... 21 3.2 Goal Metrics................................................................................................... 21 3.3 Component Technology Classification .......................................................... 21 3.4 Noise Reduction Technology Primary Focus ................................................ 21 4. Policy overview ....................................................................................................... 22 5. Research Technology Assessment ....................................................................... 25 5.1 Noise Reduction Technologies Medium Term ............................................... 25 5.1.1 Fan............................................................................................................... 25 5.1.2 Jet ................................................................................................................ 27 5.1.3 Airframe ...................................................................................................... 29 5.1.4 Core ............................................................................................................. 32 5.1.5 Nacelle Liners ......................................................................................... 36 5.2 Noise Reduction Technologies Long Term .................................................... 37 5.2.1 Fan............................................................................................................... 37 5.2.2 Jet ................................................................................................................ 40 5.2.3 Airframe ...................................................................................................... 41 5.2.4 Core ............................................................................................................. 42 5.2.5 Nacelle Liners ......................................................................................... 44 6. Noise reduction prospects ........................................................................................ 45 6.1 Aircraft Category Selection and Engine Bypass Ratio Projections .................. 45 6.2 Pilot Studies ....................................................................................................... 48 6.3 Assessment of noise reduction trends with bypass ratio BPR and Noise Reduction Technology NRT ................................................................................. 56 6.4 Novel Engine Airframe Concepts .................................................................. 61 7. Recommended noise reduction goals ....................................................................... 66 7.1 Mid Term Year 2018 ...................................................................................... 66 7.2 Long Term Year 2028 ..................................................................................... 67
Page 3 of 106 7.3 Medium and Long Term Summary .................................................................... 68 7.4 Comparison between IEP Targets and Research Goals ..................................... 73 8. Other considerations ................................................................................................ 77 8.1 Trade-offs ....................................................................................................... 77 8.2 Noise Abatement Operational Procedures ..................................................... 78 9.1 References 2nd Aircraft Noise Technology Workshop Presentations, September 26, 2008 ................................................................................................. 82 9.2 References Noise Technology Independent Experts Review Presentations, September 29-October 1, 2008 ................................................................................ 82 9.3 Independent Expert Panel Additional References ............................................ 83 Appendix A .................................................................................................................. 84 Assessment of noise reduction trends with bypass ratio BPR and Noise Reduction Technology NRT at each certification point ............................................................. 84 A.1 Noise Reduction at Approach ....................................................................... 84 A.2 Noise Reduction at Flyover ........................................................................... 85 A.3 Noise Reduction at Lateral ............................................................................ 85 Appendix B .................................................................................................................. 96 Uncertainty Estimates for Noise Reduction Goals ...................................................... 96 B.1 Engine Cycle Change Effects Uncertainties Mid Term ................................. 96 B.2 Noise Reduction Technology Benefit Uncertainties Mid Term ..................... 97 B.3 Combined Uncertainties in Cycle Change and NRT Benefit ............................ 98 B.4 Long-Term Cumulative Noise Benefit Uncertainty .......................................... 98 B.5 Noise Goal Uncertainty Assessment Summary ................................................ 99 Appendix C Reference Aircraft Selection MTOM effect on Cumulative EPNL re Chapter 4 .................................................................................................................... 100 Corrigenda.................................................................................................................. 105
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Annex 16. Vol 3. Edition 1. Environmental Protection. Volume III. Aeroplane CO2 EmissionsDoc 10127. Edition 1. Independent Expert Integrated Technology Goals Assessment and Review for Engines and AircraftВСЕ ДОКУМЕНТЫALL DOCUMENTSDoc 9943
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