August 22, 2016
UTRC team earns AIAA Green Engineering Best Paper Award

EAST HARTFORD, Connecticut – UTRC's Scott Ochs, Ray Sing Lin, and Larry Hardin were recently honored by the American Institute of Aeronautics and Astronautics (AIAA) with its Green Engineering Best Paper Award.

The winning paper, titled, "Impact of Ultra High Bypass/Hybrid Wing Body Integration on Propulsion System Performance and Operability," was co-authored by the UTRC team and Pratt & Whitney employees Wesley Lord, Gavin Hendricks and Michael Kirby.

Ochs, Staff Research Engineer, Aerodynamics, Thermal & Fluid Sciences; and Lord, Pratt & Whitney Technical Fellow, System Architecture Functional Design, received the award at the AIAA Best Paper Awards Luncheon, July 27 at the AIAA Propulsion and Energy Conference in Salt Lake City, Utah.

A team comprised of UTRC and Pratt & Whitney -- and led by Boeing -- completed a NASA-funded computational fluid dynamics (CFD) based study of blended wing body (BWB) airframe distortion ingestion effects on aft fuselage, pylon-mounted geared turbofan (GTF) propulsion systems.

Under previous NASA programs, the Boeing team defined significant benefits for the BWB aircraft toward NASA's next two generations (N+2) goals, but also identified the potential risk of ingestion of airframe-generated distortion into the propulsion system.

Boeing's full-vehicle CFD solutions were provided to the UTRC/Pratt & Whitney team upstream of the engine inlets for use in full-wheel, unsteady coupled inlet/fan analyses using modeling processes developed under previous joint program activities.

The coupled analyses were carried out using UTC’s internal CFD solver to define the aerodynamic impact on the fan associated with ingestion of either the airframe boundary layer flow, or vortical flow structures emanating from the airframe, at various off-design operating conditions.

As a result of this study, it was found that the GTF engines achieved adequate performance, maintained required stall margin, and produced fan blade stress levels within acceptable limits for BWB aircraft operation in the aft fuselage, pylon-mounted configuration.

The team held a successful program review with NASA in December 2015, and reported a subset of the results in this jointly authored UTRC/Pratt & Whitney paper at AIAA's SciTech meeting in January.

Both the NASA program review and presentation of this paper were well received by NASA and others in the technical community. In addition, this work was also highlighted in Aviation Week & Space Technology Magazine, with specific mention of the UTRC/Pratt & Whitney team's contributions to understanding propulsion system performance and operability.

Contact: Laura Stevens, (860) 610-1653

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