Analysis of aircraft icing and its preventive measures
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PPT contains basic information of aircraft/aeroplane icing and the methods or devices (icing prevention and removal system) to avoid such phenomenon.
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Bruce Carmichael, Director, Aviation Applications Program, National Center for Atmospheric Research
February 2016 - UCAR Congressional Briefing on Aviation Weather Safety
Video of this presentation: https://president.ucar.edu/government-relations/washington-update/3594/aviation-weather-safety-ucar-congressional-briefing
University of athens
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This document reviews computational fluid dynamics (CFD) analysis that has been conducted on delta wing aircraft and airfoils with surface modifications like dimples. Several studies are summarized that used CFD to analyze how dimples affect lift and drag on airfoils at various angles of attack. Dimples function similarly to vortex generators by creating vortices that delay flow separation and reduce pressure drag. Researchers have found that dimples can increase an aircraft's aerodynamic performance characteristics and maneuverability by reducing drag and stall. The document reviews multiple studies that analyzed different dimple shapes and configurations on symmetric and asymmetric airfoil profiles.
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Effect of humanoid shaped obstacle on the velocity
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Analysis of wings using Airfoil NACA 4412 at different angle of attack
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Hietanen jarmo
The document discusses testing and development of de-icing systems for ultrasonic wind sensors used in cold climates. It describes different types of ice formation, including primary ice from rain or snow and secondary ice. Testing methods for wind sensors under icing conditions are outlined, including wind tunnel tests where scale models are subjected to controlled icing. The de-icing system of the Ultrasonic Wind Sensor WMT700 is studied under various laboratory conditions to improve performance in cold weather.
Aviation - Infrastructure management
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Electrical Isolation procedure onboard ship
Electricity is a hidden and soundless killer. So, dealing with electricity is inherently hazardous and it is tough to assure that safe working conditions are in place. Undoubtedly, safe electrical isolation is the first prior onboard ship. Both the seafarer and the company have responsibilities to ensure a safe working environment.
Shipboard employees face various problems that can make servicing operations more
challenging, such as:
# Large and complex vessel and vessel machinery, facilities, and systems;
# Machinery, equipment, and systems having multiple power sources, insulating points
and energy types; and
# Difficulty in identifying all energy sources due to faulty engineering drawings and
schematics.
3D General Aviation Applications SA (Company Profile)
One of the very few companies offering Weather Modifications services and protection from extreme weather phenomena. Specialising in hail suppression, rain and snow enhancement and agriculture applications.
Landing gear Failure analysis of an aircraft
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Aircraft icing glossary
This document provides definitions for key terms related to aircraft icing training. Some key terms defined include: accretion, the growth of ice on aircraft surfaces; anti-icing, protecting aircraft surfaces from ice formation for a limited time; and deicing, removing frost, snow, or ice from aircraft surfaces. Braking action, ceiling, and charts are also defined. The document serves as a glossary for technical terms pilots and flight crews may encounter regarding aircraft icing conditions and mitigation.
Presentation sir shakaib.pptx
This document discusses how weather affects aviation and best practices for managing weather conditions. It covers various types of hazardous weather like thunderstorms, icing, turbulence and low visibility that can impact flights. It also outlines methods used in the aviation industry for forecasting weather, detecting conditions in flight, managing icing, avoiding hazardous areas, and recognizing unstable flight due to weather. Key practices include using weather reports and radar, operating ice protection systems, deviating around thunderstorms by 100 miles if needed, and closely monitoring aircraft control and stability.
Business ethics
- On March 3, 1974, Turkish Airlines Flight 981, a DC-10 aircraft, crashed at Orly Airport in Paris shortly after takeoff, killing all 346 people on board. This was the worst aviation accident at the time.
- The crash was caused by the aircraft's rear cargo door opening during takeoff due to a faulty latching mechanism designed by McDonnell Douglas. The open door caused rapid decompression which severed hydraulic lines and made the plane impossible to control.
- Despite a similar accident occurring in 1972, McDonnell Douglas and the FAA failed to properly address the faulty cargo door design, contributing to the deadlier crash of Flight 981. This raised further concerns about safety issues with the DC
Aircraft Ground Icing
Small, almost imperceptible amounts of ice on the upper surface of an aircraft's wing can significantly degrade performance and cause potential loss of control during takeoff. Pilots are urged to thoroughly inspect the entire wing surface, including tactile inspection, to ensure no ice, frost or snow accumulation before takeoff. Even minute amounts of upper wing surface contamination that are difficult to detect visually can reduce stall margins and should not be considered safe for takeoff.
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Quick History and Notable Successes in Aviation Weather Safety
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Analysis of aircraft icing and its preventive measures
- 2. LITERATURE REVIEW Fikret Caliskan , Chingiz Hajiyev The paper aims at the detection and identification of airframe icing using statistical properties of aircraft dynamics and reconfigurable control protecting aircraft from hazardous icing conditions. Guo fan , Chang shinan This paper describes the principle of electro-impulse de-icing (EIDI) system of an aircraft which use electromagnetic force to remove ice. Mark G. Potapczuk The research paper covering the icing environment, investigations into the physics of ice accretion on aircraft surfaces,engine performance, icing instrumentation development etc.
- 3. INTRODUCTION In aviation, aircraft icing are those atmospheric conditions that can lead to the formation of water ice on the surfaces of an aircraft.
- 5. ACCIDENTS Aircraft icing is one of the major weather hazards to aviation and has resulted in several fatal accidents.
- 6. CAUSES OF ICING 1. Liquid Water Content (LWC) Amount of available water Varies from cloud to cloud Varies within same cloud
- 7. 2. Temperature Most icing tends to occur at temperatures between 0°and -20°C More than 50% of those occur between -8 and - 12°C CAUSES OF ICING
- 8. CAUSES OF ICING 3. Water Droplet Size Icing patterns change with droplet size. In relation to icing hazards –Droplet size not as important as LWC and Temperature
- 9. TYPES OF STRUCTURAL ICE
- 10. ICE DETECTION
- 11. ICE DETECTION 1. Lucas ice detection system
- 12. ICE DETECTION Vibro Meter
- 13. ICING PREVENTION AND REMOVAL Pneumatic deicing boots Thermal Electrical heating elements ThermaWing Turbine engine bleed air Electro-mechanical Weeping Wing Electro-Mechanical Expulsion Deicing System (EMEDS) Hybrid Electro-Mechanical Expulsion Deicing System Passive (cover system mainly used in the telecoms and offshore domains) Anti icing cover
- 14. ICING PREVENTION AND REMOVAL Pneumatic deicing boots Rubber boot
- 15. ICING PREVENTION AND REMOVAL Electro- Impulse De-icing System
- 16. ICING PREVENTION AND REMOVAL Controlling Leading Edge Temperature by bleed air
- 17. ICING PREVENTION AND REMOVAL Weeping Wing
- 18. ICING PREVENTION AND REMOVAL De-icing fluids
- 20. CONCLUSION Ice has a greater impact on aircrafts performance & may causes severe accidents. The recent improvements results in safe flight even in severe weather conditions. various technologies are in development .
- 21. REFERENCES Fikret Caliskan , Chingiz Hajiyev , “A review of in-flight detection and identification of aircraft icing and reconfigurable control”, Progress in Aerospace Sciences. 2013. Yiqun Dong, Jianliang Ai ,“Research on inflight parameter identification and icing location detection of the aircraft”, Aerospace Science and Technology.2012. Mark G. Potapczuk, “Aircraft Icing Research at NASA Glenn Research Center”, journal of aerospace engineering. 2013. Giuseppe Mingione , Massimo Barocco, “FLIGHT IN ICING CONDITIONS SUMMARY”
- 22. THANK YOU