1 Abstract The Boeing Blended Wing Body transport class airplane concept can achieve significant environmental benefits in the form of lower fuel burn, lower community noise, and reduced CO2 & NOx emissions compared to current and previously generations of commercial aircraft. Research and development activities completed by Boeing over the past 10 years will be described in this paper. Advanced vehicle concept studies were completed to identify which technologies and configurations have the greatest opportunity for meeting and exceeding the fuel burn, noise and emissions goals laid out by NASA Aeronautics’ Environmentally Responsibility Aviation Program. 1 Introduction The Environmentally Responsible Aviation (ERA) Project within the Integrated Systems Research Program (ISRP) of the NASA Aeronautics Research Mission Directorate (ARMD) had the responsibility to explore and document the feasibility, benefits, and technical risk of air vehicle concepts and enabling technologies to reduce the impact of aviation on the environment. The primary goal of the ERA Project was to select air vehicle concepts and technologies that could simultaneously reduce fuel burn, noise, and emissions, Fig. 1. In addition, the ERA Project identified and mitigated technical risk and transferred knowledge to the aeronautics community at large so that new technologies and vehicle concepts could be incorporated into the future design of aircraft. ERA was to address aircraft performance (especially “green" technology) within the N+2 (2020) timeframe for entry into service with the objective of integrating the most viable technologies. [1] 2 Advanced Vehicle Concept Study In 2011, Boeing performed a NASA sponsored study which compared several Blended Wing Body (BWB) configurations to current and futures tube and wing airplane designs utilizing similar technology readiness levels and projected entry into services time periods. The research indicates that key enabling technologies for the BWB vehicle are advanced composites for a light weight efficient flat sided pressure cabin; efficient propulsion-aerodynamic integration of ultra-high bypass ratio engines; propulsion aero- acoustics integration; flight control and actuation systems; and the high aerodynamic efficiency at transonic conditions that are inherent in the BWB configuration. Effectively combining these technologies can result in over 50% lower mission fuel burn, 40dB+ cumulative margin to FAR Part 36 Stage 4 noise limits, and 75% lower LTO NOx margin below CAEP/6 levels [1]. Figure 1. NASA System Level Metrics BLENDED WING BODY TRANSPORT AIRCRAFT RESEARCH & DEVELOPMENT John T. Bonet Boeing Research & Technology Keywords: BWB, fuel-burn, propulsion-integration, noise, efficiency
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Transcript
1
Abstract
The Boeing Blended Wing Body transport class
airplane concept can achieve significant
environmental benefits in the form of lower fuel
burn, lower community noise, and reduced CO2
& NOx emissions compared to current and
previously generations of commercial aircraft.
Research and development activities completed
by Boeing over the past 10 years will be
described in this paper. Advanced vehicle
concept studies were completed to identify which
technologies and configurations have the
greatest opportunity for meeting and exceeding
the fuel burn, noise and emissions goals laid out
by NASA Aeronautics’ Environmentally
Responsibility Aviation Program.
1 Introduction
The Environmentally Responsible Aviation
(ERA) Project within the Integrated Systems
Research Program (ISRP) of the NASA
Aeronautics Research Mission Directorate
(ARMD) had the responsibility to explore and
document the feasibility, benefits, and technical
risk of air vehicle concepts and enabling
technologies to reduce the impact of aviation on
the environment. The primary goal of the ERA
Project was to select air vehicle concepts and
technologies that could simultaneously reduce
fuel burn, noise, and emissions, Fig. 1. In
addition, the ERA Project identified and
mitigated technical risk and transferred
knowledge to the aeronautics community at large
so that new technologies and vehicle concepts
could be incorporated into the future design of
aircraft. ERA was to address aircraft
performance (especially “green" technology)
within the N+2 (2020) timeframe for entry into
service with the objective of integrating the most
viable technologies. [1]
2 Advanced Vehicle Concept Study
In 2011, Boeing performed a NASA sponsored
study which compared several Blended Wing
Body (BWB) configurations to current and
futures tube and wing airplane designs utilizing
similar technology readiness levels and projected
entry into services time periods. The research
indicates that key enabling technologies for the
BWB vehicle are advanced composites for a light
weight efficient flat sided pressure cabin;
efficient propulsion-aerodynamic integration of
ultra-high bypass ratio engines; propulsion aero-
acoustics integration; flight control and actuation
systems; and the high aerodynamic efficiency at
transonic conditions that are inherent in the BWB
configuration. Effectively combining these
technologies can result in over 50% lower
mission fuel burn, 40dB+ cumulative margin to
FAR Part 36 Stage 4 noise limits, and 75% lower
LTO NOx margin below CAEP/6 levels [1].
Figure 1. NASA System Level Metrics
BLENDED WING BODY TRANSPORT AIRCRAFT RESEARCH & DEVELOPMENT