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Reduce Fuel Burn With a Dose of BLI
It sounds like a cause of heart burn.
Instead, Boundary Layer Ingestion – or BLI – is a promising idea NASA researchers are studying to reduce fuel burn in jet engines, thus reducing emissions and the cost of operating the aircraft.
At its simplest: With BLI, an airplane’s engines are located near the rear of the aircraft so that air flowing over the aircraft body becomes part of the mix of air going into the engine and is then accelerated out the back
“The idea isn’t completely new,” said Jim Heidmann, manager of the Advanced Air Transport Technology Project at NASA’s Glenn Research Center in Cleveland. “What we’re testing now are new technologies that can help us derive benefits from BLI.”
So, more specifically, what exactly is BLI and how does it lead to potential economic and environmental benefits?
A quick review: When an airplane is flying, it has four major forces acting on it – thrust, drag, weight and lift. Thrust makes an airplane go forward, while drag tries to slow it down. Lift offsets the weight to keep an airplane in the sky.
BLI deals specifically with the drag part of the equation by, ultimately, trying to reduce the total drag an airplane experiences in the sky.
It all starts with the fact that as an airplane flies through the air, a layer of slower moving air begins to build up along the skin of the fuselage and wings, which is fittingly called the boundary layer. This slower moving air causes additional drag.
At the front of the airplane the thickness of the boundary layer is zero, but as the air flows back over the surface of the airplane’s fuselage and wings, the layer grows thicker. By the time it gets to the rear of the airplane it can be a foot or more deep.
In a conventional tube and wing airplane, where the jet engines are hung beneath the wings, that’s the end of the boundary layer story. The slower, drag-inducing airflow just continues off the rear of the airplane to mix with the undisturbed air there.
The Indian Air Force (IAF) received its first C-295 transport plane on Wednesday during a ceremony in Seville, Spain. The aircraft may carry out unique missions such as disaster relief and marine patrol.
“The IAF has placed an order for 56 aircraft.” The aircraft is also required by the Coast Guard, the Home Ministry, and, in the future, the Indian Navy. “The numbers could easily exceed 56,” Chaudhari said from Spain.
Airbus, a multinational aircraft maker, built the aircraft for India at its Seville factory.
“The first aircraft was delivered 10 days ahead of schedule,” the IAF chief stated after receiving the plane’s symbolic keys from Airbus.
The Indian Air Force has inked a deal for a total of 56 C-295 aircraft, with 16 of them being manufactured in Spain and the remaining 40 to be built as part of a joint venture between Tata and Airbus at their facility in Vadodara, Gujarat.
The C-295 is a versatile transport plane with a cargo capacity ranging from 5 to 10 tonnes. It is intended to replace the aging Avro aircraft in the IAF’s fleet and boasts advanced technology features. Notably, the aircraft is equipped with a rear ramp door, facilitating rapid cargo and troop para-dropping operations.
The C-295 is a twin-turboprop aircraft that can fly great distances with fully equipped personnel while also having the ability to land on tiny airstrips. To improve its capabilities in the operational zones, the IAF says all 56 aircraft would be equipped with a native Electronic Warfare Suite (EWS).
According to the agreement, Airbus will deliver 16 aircraft in “flyaway” condition from Spain within 48 months of the contract’s signature, and the Tata consortium would produce the 40 additional aircraft in India over the course of the next ten years. This represents a groundbreaking initiative, as it marks the first time a private firm in India will be responsible for producing military aircraft.
This move aligns with the Indian government’s “Atmanirbhar Bharat Abhiyan,” providing a unique opportunity for the Indian private sector to enter the highly technical and competitive aviation industry. It’s anticipated that this initiative will bolster domestic aircraft production, reducing dependence on imports and potentially leading to increased exports in the future. This development is a significant step forward in India’s quest for self-reliance in defense manufacturing.
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Rolls-Royce Successfully Tests UltraFan Technology Demonstrator using 100% Sustainable Aviation Fuel (SAF)
The first tests were conducted using 100% Sustainable Aviation Fuel (SAF)
Rolls-Royce (LSE: RR., ADR: RYCEY) today announces it has successfully completed the first tests of its UltraFan technology demonstrator at its facility in Derby, UK. The first tests were conducted using 100% Sustainable Aviation Fuel (SAF).
Rolls-Royce UltraFan technology ready to test(Opens in a new browser tab)
This is a historic moment for Rolls-Royce – it’s the first time in 54 years the aero-engine manufacturer has tested a brand-new engine architecture and is proof of what can be achieved when industry and Governments work together.
Confirming the capability of the suite of technologies incorporated in the demonstrator is a big step towards improving the efficiency of current and future aero-engines. UltraFan delivers a 10% efficiency improvement over the Trent XWB, which is already the world’s most efficient large aero engine in service.
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In the nearer term, there are options to transfer technologies from the UltraFan development program to current Trent engines, providing our customers with even greater availability, reliability, and efficiency.
Rolls-Royce reaches new milestone building world’s largest aero-engine(Opens in a new browser tab)
In the longer term, UltraFan’s scalable technology from ~25,000-110,000lb thrust offers the potential to power new narrowbody and widebody aircraft anticipated in the 2030s.
It’s not accurate to say that aircraft can’t pass over the Bermuda Triangle. Over the years, a number of ships and aircraft have mysteriously vanished in the Bermuda Triangle, a location in the western North Atlantic Ocean. However, a large percentage of airplanes that fly over the Bermuda Triangle do so safely and incident-free.
Despite this, some people choose not to cross this part of the ocean because of the widespread superstition there. You’d be surprised at how many people have flown or sailed over the area without noticing anything peculiar despite the strange stories.
Pakistan Airlines flight attendant lands in Toronto, then disappears(Opens in a new browser tab)
The Bermuda Triangle is not inaccessible to aircraft, as is commonly believed. There are no official flying restrictions in place, according to the Federal Aviation Administration (FAA), and the Bermuda Triangle is not considered a special area of concern.
The reasons why so many ships and aircraft have vanished in the Bermuda Triangle are the subject of numerous theories, ranging from human error to natural disasters to alien action. However, none of these explanations are supported by scientific data, and the majority of the disappearances may be accounted for by natural factors like bad weather or navigational mistakes.
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In conclusion, despite having a bad reputation for being a hazardous area for ships and airplanes, there is no evidence that the Bermuda Triangle is any more dangerous than other oceanic regions. The final communication that was received described compasses acting strangely and the crew continuously getting lost no matter how many times they changed course. What had started out as a typical training flight quickly transformed into a big mystery.
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