Fluid dynamics

July 16, 2014 - 1:00am

The Bauhaus Luftfahrt aerospace think-tank in May unveiled a concept for a “propulsive fuselage” aircraft, opening a new possibility for fuel burn reduction. It is part of a European Union-funded project in cooperation with a number of research centers, as well as MTU Aero Engines and Airbus Group Innovations (OE13). The latter company is also studying a hybrid-power regional airliner with Rolls-Royce (Hall 4 Stand H3). Meanwhile, it is flying a hybrid-lift quadcopter demonstrator for unmanned military and civil missions, the Quadcruiser.

July 14, 2014 - 7:50am
Titanium-aluminide low-pressure turbine blades and proposed cooling arrangements on Rolls-Royce’s proposed future UltraFan engine may owe much to the RB3025 powerplant unsuccessfully offered to power the Boeing 777X. For example, the RB3025 featured a “vortex amplifier” to simplify turbine-blade cooling with HPC air.

New engines planned by Rolls-Royce (R-R) reflect recent powerplant trends, including steadily increasing propulsive efficiency obtained with larger-diameter fans, higher bypass ratios and smaller engine cores. The engines could power updated contemporary widebody platforms, with R-R civil large engines president Eric Schulz confirming “very live” discussions with Airbus. “If it decides to re-engine the A330 or A380, we will be here to provide support,” he said during a pre-show briefing.

July 14, 2014 - 6:25am
Pratt’s envisioned NGRT engine would feature an all-new compressor, a miniaturized version of P&W’s Talon combustor and possibly an eight-blade propeller.

While ATR and Bombardier continue to vacillate over plans to introduce a new 90-seat turboprop, Pratt & Whitney Canada keeps moving forward with a powerplant it believes will deliver a 20-percent fuel burn improvement over existing engines in the 5,000- to 7,000-shp range by the turn of the decade. Dubbed the Next Generation Regional Turboprop (NGRT), the engine would feature an all-new compressor, a miniaturized version of Pratt & Whitney’s patented Talon combustor and (probably) an eight-blade propeller.

July 14, 2014 - 1:40am

The technology stakes are high for the GE9X engine that will power Boeing’s new 777X twinjet, but GE Aviation believes its big bet on the weight savings to be delivered by unprecedented use of composites is about to pay off. The U.S. engine maker, which currently holds orders for some 600 of the engines, is leaving nothing to chance and, with more than two years of technology maturation behind it, the company is now stepping up its test program en route to certification in 2018.

July 11, 2014 - 6:15am
A mockup of an open-rotor engine has been tested in an Onera wind tunnel since 2010; a full demonstrator is due to run in 2016.

As preparations continue for running a full open-rotor engine demonstrator in 2016 under Europe’s Clean Sky research effort, French engine maker Snecma (Hall 4 Stand B12) sees the program’s participants reaching a consensus as whether or not to proceed in the 2017-to-2019 time frame. Clean Sky, which also involves Airbus, Rolls-Royce and French research center Onera, has provided a relatively unexpected discussion platform, thus facilitating a general agreement.

July 3, 2014 - 2:04pm

France-based engine developer Price Induction is taking its DGen 380 turbofan on a U.S. tour this month. Exhibited on a mobile test bed, the 575-pound-thrust powerplant and all of its operating equipment have been mounted on a truck platform for the tour. Next stops are Chicago (July 21), Cleveland (July 24) and University Park, Pa. (July 28).

June 17, 2014 - 3:20pm

In a move that could help pave the way for low-boom supersonic flight over land, NASA aeronautics researchers are presenting their work on how people on the ground perceive low sonic booms this week in Atlanta at an annual event held by the American Institute of Aeronautics and Astronautics. “Lessening sonic booms is the most significant hurdle to [civil] supersonic flight,” said Peter Coen, head of the high-speed project in NASA’s aeronautics research mission directorate at the agency’s headquarters in Washington, D.C.

May 28, 2014 - 10:00am

More than 4,000 sq ft of Duncan Aviation’s new 175,000-sq-ft hangar in Lincoln, Neb., is dedicated to engines. “We’ve been in the new shop for only a few months but have already experienced a significant increase in work efficiency and improvement to the safety of our customers’ property,” said James Prater, manager of turbine engine services. “Before the move, all engines and their components would remain subject to being moved in the hangar.

May 27, 2014 - 12:40pm

While ATR and Bombardier continue to vacillate over plans to introduce a new 90-seat turboprop, Pratt & Whitney Canada keeps moving forward with an engine it believes will deliver a 20-percent fuel burn improvement over existing engines in the 5,000- to 7,000-shp range by the turn of the decade. Dubbed the Next Generation Regional Turboprop (NGRT), the engine would feature an all-new compressor, a miniaturized version of Pratt & Whitney’s patented Talon combustor and likely an eight-blade propeller

May 19, 2014 - 6:00pm
Aerion is seeking an engine supplier now that it has switched to a trijet configuration for the “AS2” supersonic bizjet.

Aerion Corp. (Booth 3634) is redesigning its proposed supersonic business jet (SSBJ) with a larger cabin and more range, reflecting feedback from a recent operators survey. The new aircraft–dubbed AS2, for Aerion supersonic second design–has three engines versus two on its now-scrubbed predecessor. It still retains a supersonic natural laminar-flow wing, which it calls “the key enabling technology behind practical and efficient supersonic and high-subsonic flight.”

 
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