Analysis of an Additively Manufactured Cooled Ultra Compact Combustor Vane

[+] Author and Article Information
Kevin J. DeMarco

2950 Hobson Way Dayton, OH 45433 kevdmarco@gmail.com

Brian T. Bohan

2950 Hobson Way WPAFB, OH 45433 brian.bohan@afit.edu

Marc D. Polanka

1950 Hobson Way Huber Heights, OH 45433 marc.polanka@afit.edu

James L. Rutledge

2306 Hazelnut Dr Fairborn, OH 45324 j.rutledge@alumni.utexas.net

Pejman Akbari

Electromechanical Engineering Technology Department California State Polytechnic University Pomona, CA 91768 pejmanakbari@cpp.edu

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received February 7, 2019; final manuscript received April 16, 2019; published online xx xx, xxxx. Assoc. Editor: Matthew Oehlschlaeger.

ASME doi:10.1115/1.4043548 History: Received February 07, 2019; Accepted April 16, 2019


The Ultra Compact Combustor (UCC) aims to increase the thrust-to-weight ratio of an aircraft gas turbine engine by decreasing the size, and thus weight, of the engine's combustor. The configuration of the UCC as a primary combustor enables a unique cooling scheme to be employed for the Hybrid Guide Vane (HGV). A previous effort conducted a Computational Fluid Dynamics (CFD) analysis that evaluated whether it would be possible to cool this vane by drawing in freestream flow at the stagnation region of the airfoil. Based on this study, a cooling scheme was designed and modified with internal supports to make additive manufacturing of the vanes possible. This vane was computationally evaluated comparing the results with those of a solid vane and hollow vane without cooling holes as a demonstration of the improvements offered by this design. Furthermore, the effects of the internal support structure were deemed beneficial to surface cooling when evaluated through comparisons of internal pressure distribution and overall effectiveness. Following the computational study the vane was manufactured and experimentally evaluated with the results compared to those of an uncooled solid vane. The experimental results validated the computational analysis and demonstrated though pressure and temperature measurements that the cooled vane had a reduced surface temperature compared to the uncooled vane and that pressure distributions supported coolant flow through film-cooling holes.

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