Business

September 25, 2013

Pratt & Whitney advancing sixth generation military engine technology

Pratt & Whitney and the U.S. Air Force Research Laboratory have begun testing of Pratt & Whitney’s unique, adaptive supersonic fighter engine fan rig based on a full-scale F135 development fan to advance the next generation of military fighter engine technology.

The purpose of the adaptive fan rig test is to mature technologies associated with adaptive bypass flow associated with a third stream of air, which will enable efficiency improvements in long-range persistence and high thrust combat maneuvers as well as in transonic and supersonic flight conditions.

Pratt & Whitney is a United Technologies Corp. company.

Similar to changing gears in a car or on a bicycle, changing an aircraft engine’s bypass ratio allows the engine to be optimized for high thrust takeoffs, while maintaining the efficiency of a commercial airline’s high bypass engine in cruise conditions. Unlike commercial airline engines which are attached to the wing, engines used in modern fighter aircraft must use smaller diameter turbofans and be embedded within the aircraft. Consequently, there is a performance tradeoff between high thrust capabilities and optimum efficiency experienced in cruise conditions. Developing a next generation variable cycle adaptive engine is therefore essential to meeting the evolving needs of the warfighter.

Modern military turbofan engines have two airstreams – one that passes through the core of the engine, and another that bypasses the core. Development of a third stream of airflow will allow for improved fuel efficiency and cooler heat sinks which improve thermal management of the air system and reduced heat signature.

“Developing an effective adaptive fan concept is a critical step in advancing technology that will ensure next generation air dominance for our military,” said Jack Hoying, program manager, Air Force Research Laboratory. “We are working closely with our industry partners to develop game-changing technologies that will truly advance the state of the art for military engines in the 21st Century.”

The adaptive fan variable cycle technology will leverage and improve upon Pratt & Whitney’s baseline experience in building and fielding 5th generation fighter engines – the F119 that powers the F-22 Raptor, and the F135 powering the F-35 Lightning II, according to Bennett Croswell, president, P&W Military Engines.

“Pratt & Whitney has an innovative approach to achieving variable cycle features with a multiple flow path architecture,” said Croswell. “We’re building on our foundation of proven 5th generation capabilities, and we are now mastering adaptive technologies – really expanding the boundaries of state of the art engine technology critical for the next 6th generation aircraft.”

The fan rig test is being conducted in tandem with several other technology initiatives that are advancing the state of military engine technology, including the AFRL-sponsored Adaptive Engine Technology Demonstration (AETD) program, the U.S. Navy Fuel Burn Reduction (FBR) program, and other internal Pratt & Whitney advanced engine concept efforts.

The AETD program has a goal of providing a 25 percent improvement in specific fuel consumption and a 10 percent improvement in thrust levels compared to today’s fifth-generation combat aircraft engines. The FBR demonstration program is focused on delivering a 5+ percent reduction in fuel burn in an F135 demonstration engine.

The adaptive fan rig tests are being conducted at the AFRL Compressor Research Facility in Dayton, Ohio. The jointly-funded program was launched in late 2011, with tests of the adaptive fan concept taking place from August through September 2013. Following testing, the combined Pratt & Whitney and AFRL team will conduct additional processing and engine test analysis.




All of this week's top headlines to your email every Friday.


 
 

 

Headlines April 20, 2015

News: Sale of U.S. arms fuels the wars of Arab states - As the Middle East descends into proxy wars, sectarian conflicts and battles against terrorist networks, countries in the region that have stockpiled American military hardware are now actually using it and wanting more. U.S. spending $1 billion to reassure European allies - From Army rotations...
 
 

News Briefs April 20, 2015

Last two Raiders give congressional medal to Ohio museum The last two ìDoolittle Tokyo Raidersî have presented their Congressional Gold Medal for permanent display at a museum in southwest Ohio. The medal arrived at the National Museum of the U.S. Air Force near Dayton in a ceremonial B-25 bomber flight. The medal was awarded by...
 
 
Northrop Grumman photograph

Space Solar Power Initiative established by Northrop Grumman, Caltech

Northrop Grumman photograph Northrop Grumman’s Joseph Ensor (left) and Caltech’s Ares Rosakis (right) shake hands as part of the recent SSPI commemoration event held at the California Institute of Technology, Pasade...
 

 
Navy photograph

Triton UAS conducts first flight with search radar

Navy photograph The MQ-4C Triton unmanned aircraft takes off from Naval Air Station Patuxent River, Md., April 16, to conduct its first flight from the naval base. The aircraft began sensor testing on April 18 and flew with its...
 
 

UTC introduces active side-sticks to large commercial aviation

UTC Aerospace Systems is introducing the world’s first active side-stick controller for large commercial aircraft. UTC Aerospace Systems is a unit of United Technologies Corp. UTC Aerospace Systems’ Actuation & Propeller business unit is supplying the active side-sticks for the cockpit of the new Irkut MC-21 single aisle aircraft. The MC-21 family of aircraft will...
 
 

Boeing presents flight test 787 Dreamliner to air, space museum

Boeing, elected and community leaders joined together April 17 to celebrate the permanent display of one of the original 787-8 Dreamliner flight test airplanes at the Pima Air & Space Museum. “Boeing has a strong presence in Arizona and is proud to share this important achievement in aviation history with the community, our employees and...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>