A future concept vehicle designed by the US research team will be designed around 2025, highlighting the streamlined, green features that meet NASA's design contract requirements and reduce aircraft fuel consumption standards by 50% in 1998. , reduce 75% of harmful emissions and reduce 83% due to airborne aircraft noise impact areas.
Supported by NASAâ€™s US$11 million grant, the Boeing Design Team at Huntington Beach in California, Lockheed Martin in Palmdale, Calif., and Northrop Grumman in El Segundo, Calif. The three research teams designed this future concept aircraft based on the requirements of the Environmental Responsible Aircraft Engineering project, which is sponsored by the NASA Aeronautical Research Mission Council.
The designers of Boeingâ€™s Advanced Aircraft Conceptual Design Center started with the existing X-48 technology verification machine. The verification machine has already conducted wind tunnel tests at the NASA Langley Research Center and test flight at the Delaidung Flight Research Center. The verification machine uses a hybrid wing technology developed by Boeing's famous "Phantom Project". In addition, the technical concept embodied in the X-48 technology demonstrator differs from the current aircraft in the layout of the engine. It uses a turbofan engine manufactured by Pratt & Whitney and is placed on the top of the stern, which effectively reduces the engine. The impact of noise on passengers. At the same time, the X-48 Verifier uses lighter, more loss-resistant composite materials, a variety of body noise reduction and vibration reduction technologies, advanced flight control systems, and hybrid layer airflow control technology that allows air distribution on the body surface. It is more reasonable to reduce the resistance, and it uses a large wingspan to increase lift and reduce fuel consumption.
Lockheed Martinâ€™s design uses a completely different concept. The engineer proposed a "cartridge wing aerodynamic layout" design, which forms a box structure below the wing and the vertical tail. The biggest challenge at the moment is to use lighter composite materials, landing gear technology, mixed layer air flow control technology and other auxiliary technologies. The "cage wing aerodynamic layout" can be implemented. The verifier uses a super-turbofan engine designed by Rolls-Royce (Rolls-Royce). The engine is uniquely designed with a bypass ratio five times larger than the current engine, breaking the technical limitations of turbofan engines. .
Northrop Grumman chose a winged aerodynamic layout. Its designer is the company's founder Jack Northrop, proudly working with the B2 Stealth Bomber. The Northrop Grumman's design also uses a Rolls-Royce-provided engine. Four engines are embedded in the body surface, which not only effectively controls the aerodynamic efficiency but also reduces noise.
The design plans of the three top aviation R&D institutes indicate that NASAâ€™s design concept for future concept vehicles is to reduce fuel consumption, harmful gas emissions, and noise reduction. In the preliminary design plan, the indicators such as emissions of harmful gases, emissions of nitrogen oxides during take-off and landing phases were reduced by 50%. Although it is more difficult to reduce fuel consumption and reduce noise, there are still solutions. All designs are very close to reducing the fuel consumption rate by 50%, and there are still different gaps in the noise reduction screening indicators.
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