Commercial Airplanes Noise of the Future Robert Stoker, Ph.D. Boeing Commercial Airplanes Senior Manager – Noise, Vibration and Emissions October 2018 Copyright © 2018 Boeing. All rights reserved Aviation Working Together A Strong Track Record ~ 90% Reduction in Noise Footprint ~ 70% Fuel Improvement and Reduced CO2 emissions 2 Relative fuel use Relative CO and dB Noise 1950s 1980s 2000s Copyright © 2018 Boeing. All rights reserved. 2 More Efficient, Quieter Family of New Airplanes 777X 787 12% Reduction in fuel and CO2 20% Reduction in fuel and CO2 Substantially smaller noise footprint 60% Smaller noise footprint **than the A350-1000 *than the model it replaces Less fuel, lower operating Less fuel, lower operating costs, lower CO2 emissions costs, lower CO2 emissions 737 MAX 747-8 14% Reduction in fuel and CO2 16% Reduction in fuel and CO2 40% Smaller noise footprint 30% Smaller noise footprint *than the model it replaces *than the model it replaces Copyright © 2018 Boeing. All rights reserved. 3 Significant Reduction in Community Noise London Heathrow International Airport 1965 1980 1960 1995 2011 707 727 DC10 777 787 85 dBA takeoff noise contours Copyright © 2018 Boeing. All rights reserved. 4 787 is Quieter for Communities Chicago, O’Hare International Airport A340-300 A330-200 767-300ER 787 .Chicago-O’Hare International Airport RWY 28 Takeoff noise contours Copyright © 2018 Boeing. All rights reserved. .85-dBA noise contours .6000-nmi mission Pioneers on the Frontier of Innovation Technologies For Quieter and Efficient Airplanes All Composite Fuselage Operational Procedures Chevrons Higher Bypass Ratio Modern High Lift Devices Engines Copyright © 2018 Boeing. All rights reserved. Finding Noise and Fixing It Advanced Test Techniques: Tones Identified 2000 Hz . Identify opportunities for source Loud noise reduction New vent design Old vent design . Distinguishes between engine and airframe sources Quiet Wing Anti-Icing Exhaust Vents Phased Array ( 614 Microphones on Ground) Copyright © 2018 Boeing. All rights reserved. 7 Advanced Aeroacoustic Tools for Efficient Wing Design State of the art computational tools • Complex due to geometry, grid size, flow physics, (or all three!) • Simply not possible on past programs • Grid size on the order of 100 million cells • Runs using hundreds of processors Smooth wing design • Laminar flow technologies • Advanced wing tip designs • State-of-the-art high lift systems • Composite structure allows high aspect ratio Copyright © 2018 Boeing. All rights reserved. 8 2016 ecoDemonstrator Slat Noise Cove Filler Copyright © 2018 Boeing. All rights reserved. 9 Landing Gear Fairing . Examined on QTD 2 . Showed Noise Reduction Promise . Other issues – – Brake Cooling – Maintenance . Looking and Next Generation Landing Gear Fairing on ecoDemonstrator Copyright © 2018 Boeing. All rights reserved. 10 Advanced Concepts Copyright © 2018 Boeing. All rights reserved. 11 Thanks Copyright © 2018 Boeing. All rights reserved. 12.