Blended Wing Body y jet engines Aircrafts.pptx
- 1. Blended Wing Body Aircrafts Presented by: Gulshan Kumawat
- 2. INTRODUCTION • Aviation needs more efficient and sustainable designs. • Blended Wing Body (BWB) integrates wings and fuselage. • Promises better aerodynamics, fuel economy, and lower emissions.
- 3. What is a BWB Aircraft? • Smoothly blended wings and body. • Single lifting surface. • More internal space. • Often tailless.
- 4. Aerodynamic Advantages • Less wetted area, less drag. • Entire aircraft generates lift. • Higher lift-to-drag ratio (L/D).
- 5. Fuel Efficiency and Emissions • Significant fuel savings (up to 50% in some designs). • Reduced greenhouse gas emissions. • Potential for alternative fuels like SAF and hydrogen.
- 6. Structural Challenges • Non-cylindrical pressurized cabin. • Complex load distribution. • Advanced materials and manufacturing needed. • System integration complexities.
- 7. Current Research and Key Players • NASA and Boeing: X-48 program. • Airbus: MAVERIC and ZEROe initiatives. • JetZero: Pathfinder demonstrator for commercial and military. • Natilus: Focus on cargo and autonomous BWB aircraft. • Bombardier: B2 bomber
- 9. Diverse Applications Commercial Aviation: • Passenger transport • Cargo transport Military Use: • Tanker aircraft. • Airlift and transport. • Other roles (C2ISR, drone deployment).
- 10. Disadvantages 1. Emergency Evacuation: •The unique shape of a BWB and its potential for a theater-style seating layout instead of the standard tubular design could make emergency evacuation more challenging. •2. Passenger Comfort and Windowless Cabins: •While some designs incorporate windows, they may be positioned differently and could still incur weight penalties, similar to a conventional aircraft. •Passengers near the edges of the cabin might experience more discomfort during wing roll compared to conventional aircraft. 3. Scaling and Modification Costs: •Modifying a BWB design for different sized variants can be more expensive than stretching or shrinking the fuselage of a conventional aircraft. 4. Airport Infrastructure Compatibility: •The larger wing span of a BWB could pose challenges for existing airport infrastructure, potentially requiring folding wings or adjustments to gates and taxiways.
- 11. 5. Short-Haul Economics: •BWBs might not be the most economical choice for short-haul missions due to their higher empty weight for a given payload. 6. Stability and Control: •Pitch control and lift capability at low speeds have been challenging for blended-wing designs, requiring adjustments to control surfaces and potential vertical stabilizers. 7. Rotor Burst Events: •The blended structure of a BWB could present challenges in dealing with engine debris from a rotor burst event, potentially leading to double engine failure and safety concerns. 8. Wake Vortices: •BWBs can generate stronger wake vortices than traditional aircraft, which could impact other aircraft flying in the same airspace. •9. Vertical Acceleration: •Passengers sitting nearer the plane's extremities will need to be prepared for noticeable vertical acceleration when the aircraft starts to turn.
- 12. Conclusion • BWB offers significant efficiency and environmental benefits. • Challenges in structure, evacuation, and infrastructure remain. • Strong industry interest suggests a promising future.