Clean Aircraft Concept - The Aurora D8, also known as the D8 Airliner, is a mid-2017 airship concept.
The project was launched in 2008 with a $2.9 million (€2.19 million) NASA-sponsored grant from the Massachusetts Institute of Technology (MIT) and Aurora Flight Sciences through Pratt & Whitney.
Clean Aircraft Concept
Aurora is refining the fuel-efficient D8, designed by MIT for NASA, with hopes of flying a half-sized demonstrator in 2022.
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The 180-seat 3,000 nmi (5,600 km; 3,500 mi) regular aircraft is powered by a Boeing 737 or Airbus A320 and is designed to fly at 582 mph (937 km/h; 506 kn). It could be in practical service till 2027 and finally till 2035.
Aurora Flight Pricing was acquired by Boeing on November 8, 2017 for its drones. The branch wants to accelerate development of Boeing's autonomous technology.
The side "double bubble" sail provides extra lift along the nose and turns faster due to the wider sail. As a result, smaller wings can be used to produce lift that reduces drag. Under wings used in aircraft design, attaching the jets to the rear d of the D8 allows for lower thrust requirements by reducing the boundary layer ineffectiveness (BLI). This results in the ability to use smaller and lighter high rev ratio monsters.
However, the chassis features more fundamental features than competing wing-body concepts without changing the existing airframe and BLI. The original goal was to fly at Mach 0.74 and reduce fuel burn by 70% and noise by 71 dB, but the development of a more conventional Mach 0.82 wing and sail resulted in a more conservative fuel burn of 49% and a noise reduction of 40 EPNdB. . Boeing 737-800.
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Integrating the fins on the wide tail of a fixed sail effectively improves the slow-moving boundary layer on the sail and allows for a clean, low-drag, high-profile wing. A reduction in exhaust velocity starting from the exhaust increases engine efficiency with a similar special throw. By adapting and recombining boundary layer flow, the BLI D8 reduces wasted kinetic energy by 40% in combined high-speed jet operation and a slow-speed wake behind the sail. Large-scale wind-tunnel testing with NASA showed savings of 8.4% to 10.4% with the same mass flow with the same nose area. BLI is an order of magnitude larger than the loss of diffusive boundary layer flux.
A larger fan size should be greater than 20:1 rotation. An anti-distortion fan developed by the United Technologies Research Center has been tested at scale at NASA and combats flow distortion by bringing the boundary layer closer to the upper wing surface. A compact core limits the problem of blade tip clearance from bidding, but cannot accommodate a fan in a low-pressure turbine engine, Pratt and Whitney reversed the core as a PT6 system when the hot gas was expelled through a low-pressure power turbine. Through the clutch and gearbox to the fan. To prevent an uncontrolled fan failure that does not cause the second fan to operate, the cores are angled at 50°, since they are not mechanically connected to the fan, with less pressure loss when the core flows. A core not connected to a power unit can be removed for service. A key goal of the aviation industry is to transform aviation into a clean and green, climate neutral mode of transport by 2050. This is a serious and important issue at a time when the aviation industry is beginning to recover from the unprecedented damage caused by the Covid pandemic.
Although aviation has an impressive track record in reducing emissions, the industry's growth and increased demand for aircraft have outpaced environmental achievements. By 2050, compared to 2019, the demand for aircraft is expected to triple. If nothing is done to combat the environmental impact of those flights, emissions will double.
A clean aviation public-private partnership takes up this challenge. We push the boundaries of aviation innovation to significantly reduce the environmental impact of flight.
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Clean Aviation aims to reduce aircraft greenhouse gas emissions by 30% by 2030 and to develop, integrate and demonstrate disruptive technological innovations for new aircraft concepts that pave the way for climate change by 2030. - Neutral aviation by 2050 under the EU20 Green Deal.
Although this goal is ambitious, we believe that clean aviation can succeed by building on the shoulders of the Pure Sky and Pure Sky 2 programs. However, the aviation industry as a whole needs to think outside the box. We need to find disruptive and bold new technologies that allow us to drastically reduce greenhouse gas emissions and meet internationally defined safety standards.
The first call for proposals for clean aviation will be issued by the end of March 2022 and the budget is huge - 735 million euros.
We are looking for technologies that are below the technology readiness level and will achieve success in ground or flight demonstrations as part of the Clean Aviation Program by 2028/2029. At that time, those using the program will offer new innovations to airline customers to access commercial service by 2035. Time is of the essence – meeting this deadline is critical to achieving climate-neutral aviation by 2050.
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, we highlight some of the success stories from Clean Skies and Clean Skies 2, as well as discuss the prospects for the new Clean Aviation Joint Agreement. We explain what the future of aviation looks like and how we can reshape the industry to achieve climate neutrality by 2050. The forum brings together representatives of European industry leaders, research centres, SMEs and universities. European Commission, Parliament and Member States. Registration is currently open, but today is the last day to register to join us in person! Registration for the online event closes on Wednesday 16th
The future looks bright for clean aviation. Pure Sky 2 has attracted 940 organizations from 30 countries and more than 5,000 scientists and engineers have contributed to our success. We will build this impressive network as part of our new Clean Aviation program. I look forward to the new aircraft joining the 2035 fleet with the Clean Skies, Clean Skies 2 and Clean Aviation programs. Clean Aviation continues to develop new clean air technologies, with clean Scyto aircraft flying by 2029 by 2035 and aviation air neutral by 2050.
The Clean Aviation Joint Implementation (JU) builds on the achievements of Open Skies and Clean Skies 2 as it aims to achieve zero emissions in aviation. Photo credit: Pure Aviation, Pure-Aviation.eu
The Clean Aviation Joint Venture was launched on November 30, 2021. Zero-emission aviation is the goal by 2050. For this, the next generation of aircraft will have to be operational by 2035. This ensures that global commercial airlines have enough space to operate as jetliners. In fact, 75% of the world's civilian fleet needs to be replaced by 2050 to achieve the emission reductions required for climate neutrality. "Flying such aircraft in 2045 or later will not achieve what is needed to meet the 1.5ºC temperature increase," said Axel Kerin, executive director of the Joint Research Institute for Clean Aviation and former executive director of Clean Sky 2.
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The Clean Sky 2 project will be completed by 2024, with the first Clean Aviation Call for Proposals (CFP) to be issued by March 2022. The process of establishing a European Partnership for Clean Aviation started in 2020. After gathering input from industry and member states, the resulting Strategic Research and Innovation Agenda (SRIA) was finalized and will be approved on December 16.
Kerin says Clean Aviation targets planes that fly 4,000 km or less, as they account for two-thirds of the aviation industry's carbon emissions. New technologies developed at Clean Aviation JU will reduce greenhouse gas (GHG) emissions by 30-50% compared to 2020. This can be seen in the graph on the right.
"We will complete these technologies between 2027 and 2029 and demonstrate flight by 2030 so that the next generation aircraft (EIS) will be ready to enter service by 2030," Kerin said.
The graph below shows how these key technologies fit into the Clean Aviation Framework, which targets aircraft with less than 4,000,000 km. Kerin believes that these new technologies will be introduced to airlines between 2027 and 2029 and "then we will see the results of our work".
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To achieve zero emissions by 2050, the Clean Aviation Framework targets aircraft flying less than 4,000,000 kilometers and innovation/demonstration targets with key technology areas of hybrid electric propulsion, hydrogen propulsion and ultra-efficient aircraft.
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