Blended-Wing-Body Aircraft with Embedded Engines
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Solution Overview
Problem
Conventional aircraft configurations face challenges in aerodynamics, cargo-carrying capability, and engine noise, leading to inefficiencies in fuel efficiency and restricted operational hours due to aerodynamic drag and noise constraints.
Innovation Solution
The aircraft is designed with a blended-wing-body configuration featuring embedded turbofan engines, where air inlets and exhaust outlets are strategically located along the wing leading edges and upper mold lines to reduce drag and noise, incorporating thrust-vectoring flaps and nozzles for improved control and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If engines are suspended from wings or mounted on aft end of fuselage, then thrust is provided, but engine noise prevents aircraft from departing or arriving during noise curfew hours
Solution Approach 1:
The engines are nested within the fuselage body itself, with the fuselage forming the engine nacelles. The air inlets are positioned at the nose and sides of the fuselage, and the exhaust outlets are positioned at the rear, integrating the propulsion system into the aircraft body to reduce noise exposure to surrounding areas.
Solution Approach 2:
The fuselage body, which would normally be a source of aerodynamic drag, is converted into a beneficial structure that houses the engines and directs exhaust away from populated areas. The exhaust outlets are positioned to discharge gases upward and away from the ground, converting a potential noise and pollution hazard into an advantage for noise curfew operations.
2Strength
If tube-and-wing configuration with tubular fuselage is used, then structural integrity is maintained, but aerodynamic drag reduces fuel efficiency
Solution Approach 1:
The fuselage and wings are merged into a single blended-wing-body structure, eliminating the traditional tube-and-wing configuration. This integration creates a smooth, continuous surface that reduces aerodynamic drag while maintaining structural integrity through the unified design.
Solution Approach 2:
The blended-wing-body configuration employs curved, streamlined surfaces instead of sharp edges and angular joints. The smooth transitions and curved contours of the integrated fuselage-wing structure reduce flow separation and pressure drag, improving fuel efficiency while maintaining strength.
3Loss of energy
If narrow fuselage shape is used, then aerodynamic efficiency is improved, but useable volume for carrying cargo and passengers is limited
Solution Approach 1:
The aircraft design transitions from a narrow, tube-like fuselage to a voluminous blended-wing-body configuration that utilizes three-dimensional space more effectively. The integrated structure creates internal volume distributed throughout the fuselage and wing roots, providing ample cargo and passenger space without increasing aerodynamic drag.
4Object-affected harmful factors
If embedded engines are used, then noise is reduced for curfew operations, but engine accessibility for maintenance may be compromised
Solution Approach 1:
The fuselage is segmented into accessible sections that allow engine components to be reached from multiple locations. Access panels and maintenance ports are positioned at strategic points along the fuselage, enabling technicians to service the embedded engines without requiring complete disassembly of the aircraft structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances fuel efficiency by up to 30% compared to tube-and-wing aircraft, reduces aerodynamic drag, and allows for quieter operations, enabling earlier and later flight hours by minimizing noise impact.
Implementation Method 1
enhances fuel efficiency by up to 30% compared to tube-and-wing aircraft, reduces aerodynamic drag
Implementation Method 2
allows for quieter operations, enabling earlier and later flight hours by minimizing noise impact
Data Source
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AI summary
An aircraft having a blended-wing-body configuration includes a centerbody, a pair of wings, at least one pair of engines, a pair of air inlets, and a pair of exhaust outlets. The centerbody has an airfoil-shaped cross section, an aircraft centerline, an aft portion, an upper mold line, a lower mold line, and a pair of centerbody leading edge portions respectively on opposite sides of the aircraft centerline. The wings are integral with the centerbody. The pair of engines are located on opposite sides of the aircraft centerline and are mounted within the centerbody between the upper mold line and the lower mold line. The pair of air inlets are located respectively along the centerbody leading edge portions and are respectively fluidly coupled to the pair of engines. The pair of exhaust outlets our located in the aft portion of the centerbody and our respectively fluidly coupled to the pair of engines.