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[freddie01] 22/7/2024 07:50

Modified Pearl 15 ‘on track’ for hydrogen testing later this year


Rolls-Royce is on course to perform ground runs later this year of a Pearl 15 business jet engine adapted to run on gaseous hydrogen.

UK-headquartered Rolls-Royce has already completed a series of system and component tests that will pave the way towards the full engine trials.

These include hydrogen tests of an annular combustor from a Pearl 700 last year, and earlier work on fuel nozzles and actuation. The project also builds on the November 2022 ground runs of an AE 2100 turboprop on gaseous hydrogen.

Simon Burr, Rolls-Royce group director of engineering, says the project is “all coming together – we are on track”.

Runs of the 15,125lb (67kN)-thrust Pearl 15 burning gaseous hydrogen will take place “later this year”, he told a pre-Farnborough air show briefing on 11 July: “We are all set to run.”

“I’m confident we’ll execute on this. Hydrogen likes to burn – it’s not combusting it that’s the problem,” he adds. Challenges include changes to how the engine is shut down, he says, with nitrogen purging seen as a likely solution.

Further out, if liquid rather than gaseous hydrogen is used then “heat-exchanger technology becomes the most challenging bit.

“But we are just going carefully, because what we need to do is see what the market wants,” says Burr.

“There’s no point getting too far ahead of the market. What we are trying to do is make sure we are ahead and understand the technology challenges but we are not going to forge ahead and put something on the shelf if people don’t want it.”

However, he points out that “at least 50%” of the technology being developed for the hydrogen demonstrator also has a use on conventional gas turbines: “It’s not all unique to hydrogen.”

Rolls-Royce’s German unit, which makes the Pearl 15, is also leading a Clean Aviation-funded project that is charged with developing the technologies necessary to run a modern turbine engine on liquid hydrogen.

Called CAVENDISH, the initiative kicked off in January 2023 and runs until December 2026. Besides Rolls-Royce, the 19-strong consortium working on the project includes airframers Dassault Aviation, Embraer and Fokker Next Gen.

In addition to the ground-test activity, CAVENDISH will also work on “system and powerplant aircraft integration” and “define certification pathways and formulate a route to permit to fly”, according to Clean Aviation project documents. Flight testing could take place in Clean Aviation’s second phase, in the years after 2026.

“Our programme targets the delivery of mature technology in time to support potential future airframe decisions and be ready to serve as preparation for, and feed into, Clean Aviation Phase 2 which is currently in the configuration phase,” says Rolls-Royce.

Having three airframers as part of the project means it is “well placed to allow all consortium members the ability to consider the opportunities and challenges of hydrogen propulsion at platform level”.

[jackie ladd] 21/7/2024 12:14

You are a pitiful loon loser pikey halfwit

[jackie ladd] 21/7/2024 12:13

You have no life Sheedy

[jackie ladd] 21/7/2024 12:13

Bet you can't stop yaself

[jackie ladd] 21/7/2024 12:13

Adios LOON

[thanatos abysss] 21/7/2024 10:35

70p



🤣🤣🤣🤣9315;🤣

[lyqwyd] 21/7/2024 07:47

Yes, I get all that, which are markets we are already involved in. Real volume will come by taking a slice of the CFM/P&W duopoly on narrow bodies, where Ultrafan will provide a superior third option, as well as a more fuel efficient option for wide bodies.

[thegrafter] 21/7/2024 01:09

Airbus Chases A330 Deals atAir Show as Model EnjoysSecond Wind• Farnborough Air Show stands to put focus on widebody orders• Boeing aims to win sales for delayed 777X long-range modelAn Airbus SE A330neo aircraft Photographer: Jason Alden/ BloombergBy Julie Johnsson, Siddharth Philip and Leen Al-RashdanJuly 20, 2024 5:25 PMAt this year's Farnborough Air Show, Airbus SE is chasing orders for its A330neo airliner, positioning the widebody model as an attractive alternative to more advanced jets because of its favorable economics and availability.

[thegrafter] 21/7/2024 00:51

https://www.ainonline.com/aviation-news/air-transport/2024-07-20/trent-engine-upgrades-cover-fuel-efficiency-and-reliability

[lyqwyd] 20/7/2024 16:55

"Ultrafan for single aisle operations" Bingo. There's the pot of gold right there. Forget all this supersonic nonsense and other PR bullish*t. Core market.

[jack the tipper] 20/7/2024 14:34

We can buy you a blender if you like?

[smurfy2001] 20/7/2024 13:37

Ed doesn't have any choice. With the acceleration of AI more electrical power will be needed on top of an ever-expanding charging network.

Still holding.

[thanatos abysss] 20/7/2024 13:05

Jack PMd you me us

[mcunliffe1] 20/7/2024 12:28

Great news - thanks to both thegrafter and Skinny for passing along.

Looking at the Times report Skinny, and the map showing solar farms, I note there are none in the North West of England.

I suppose the wet helped our cotton spinning development so we shouldn't complain.

In a recent newspaper article I read of the massive electric demand brought about by AI processing. Water is also becoming an issue as the data hubs require considerable cooling - which is of course why the clever people build them in hot climate locations ;-(

But, a mini-nuke requires far less water cooling compared to a large, traditional nuclear facility as pointed out in the Times report.

[jack the tipper] 20/7/2024 12:12

Today, the best way to remove pain from your mind, is to stick your head in a blender