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Safran targets mid-2030s for next-generation engine with 20% fuel-burn saving | News - Travel and Aviation
Safran targets mid-2030s for next-generation engine with 20% fuel-burn saving | News
Rushdi February 25, 2021 2 min read

Safran and its partner in the CFM International joint venture GE Aviation are preparing the technologies required for a next-generation commercial aircraft engine to enter service in the mid-2030s that would cut fuel burn by over 20%.
Olivier Andries, Safran chief executive, says that the French aerospace group wants to “be at the forefront” of aviation’s efforts to address climate change, directing around 75% of its research and technology spending to this topic in the coming years.
Safran open rotor-c-Safran

Propulsion will play a key part in this, he told a full-year results briefing today, and work is under way on a future project.
“Together with our partner GE we are already preparing and maturing the technologies for a next-gen engine for a next-gen aircraft [to arrive] around mid-next decade – 2035.”
To reach the “significant” fuel-burn and emission reductions required, Safran is working on “disruptive technologies and disruptive architectures”, says Andries.
Although declining to offer details, Safran has previously demonstrated an open rotor design for a future engine, and Andries says that the company will “capitalise” on that work. The demonstrator featured twin counter-rotating fans and was sized to deliver 10t of thrust with a bypass ratio of 30:1.
A next-generation engine will offer a fuel-burn improvement of “over 20%”, he says, and be able to burn 100% sustainable aviation fuel (SAF); current CFM56 and Leap powerplants can burn up to 50%, he notes.
To encourage the uptake of SAF, Safran has proposed to the European Commission that it mandate that all airlines operating flights in Europe use a “certain percentage” of SAF. The Commission is “thinking about it”, says Andries.
In addition, Safran is also working on electric and hybrid-electric propulsion for smaller aircraft to enable the company to “become world leaders in this segment”.

Safran Open Rotor im Test

Antriebskonzept für 2030
Älter als 7 Tage
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Safran Open Rotor im Test
ISTRES - Safran hat am Dienstag offiziell den Erfolg der bislang im Geheimen durchgeführten Prüfstandsversuche mit dem Open Rotor in Istres gefeiert. Der Open Rotor Demonstrator, der im Rahmen des europäischen Clean Sky Forschungsprogramms entwickelt wurde, hatte sein Testprogramm wohl im Mai gestartet.

Wie sein Name schon sagt, verfügt der Open Rotor über nicht ummantelte Fans. In diesem Fall treibt ein Getriebe zwei gegenläufig rotierende Fans an. Mit dem Konzept soll der Kraftstoffverbrauch gegenüber dem CFM Leap um etwa 18 Prozent gesenkt werden. Eine Serienausführung könnte bis 2030 verfügbar sein.

Safran Open Rotor
Safran Open Rotor, © Safran
Das Open-Rotor-Programm läuft seit 2008, wobei sich die Tests um etwa zwei Jahre verzögerten. Partner im Rahmen des Clean Sky-Programms haben von der Europäischen Kommission für dieses Projekt über einen Zeitraum von acht Jahren 65 Millionen Euro erhalten. Insgesamt liegen die Kosten bei 127 Millionen Euro.

An dem von Safran geleitete Demonstrationsprogramm sind Partner wie GKN Aerospace, Avio und Safran Nacelles beteiligt. Vor den Bodenversuchen wurden unter anderem Windkanalversuche bei der französischen Luftfahrtforschungsagentur ONERA durchgeführt.

Unklare Marktchancen


Sie ergaben laut Hersteller, dass man mit neuen Blattformen den künftigen Lärmstandards (Chapter 14) genügen kann.

Safran Open Rotor, © Safran
Die Erfolgsaussichten eines Open Rotor sind dennoch ungewiss. Safran erforscht daher auch andere Antriebslösungen, insbesondere den UHBR (Ultra High Bypass Ratio), ein ummanteltes Turbofan-Triebwerk mit einem sehr hohen Nebenstromverhältnis, das den Kraftstoffverbrauch um 5 bis 10 Prozent reduzieren würde.

Safran Open Rotor, © Safran
Die UHBR wäre für die Flugzeughersteller eine glaubwürdige Lösung gegen 2025, da sie sich problemlos in bestehende Flugzeuge integrieren ließe. Gleichzeitig untersucht Safran auch verteilte, elektrische und hybride Antriebssysteme.

© FLUG REVUE - KS | Abb.: Safran | 04.10.2017 14:04
 

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Местный
ГП Антонов в 2019 г подписало соглашение с Safran на использование этого двигателя на своем перспективном пассажирском самолете вместимостью 200 пасс.
 

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FAA to require inspections of Leap-1A high-pressure turbine cases
By Jon Hemmerdinger24 March 2021
The Federal Aviation Administration is set to require inspections of high-pressure turbine (HPTs) cases in some CFM International Leap-1A turbofans, which power Airbus A320neo-family jets.
In a proposed airworthiness directive made public on 24 March, the FAA says a “manufacturing quality escape” affecting HPT cases could cause uncontained engine failures.
A320neo Leap engines

“Several x-rays of the bleed ports of the HPT case showed 148 parts with nonconforming indications, eight of which were significant enough to impact the life of the HPT case,” says the FAA’s proposed rule.
The issue could result in “over-temperature of the HPT mid-seal and uncontained rotor failure”, it adds.
The proposal would require operators to remove and replace affected HPT cases. It notes that CFM, in October 2020, issued a related service bulletin specifying procedure for replacing affected HPT cases.
The issue affects only eight engines in service with US airlines, according to the FAA.
CFM says the proposal mandates recommendations already specified in the service bulletin, and adds that “none of the impacted parts has overflown their life limits”.
“There have been no operational disruptions or unserviceable conditions attributable to this issue,” CFM adds. ”Safety of flight is our number one priority, and CFM has been proactively engaged with regulators and customers to address this issue.”
Headline and first paragraph updated on 25 March to specify that HPT “cases” are the subject of inspections.