"Development and testing of a variable geometry diffuser in an ultra-co" by Brian T. Bohan, Marc D. Polanka et al. 10.2514/6.2017-0777">
 

Development and testing of a variable geometry diffuser in an ultra-compact combustor

Document Type

Conference Proceeding

Publication Date

1-5-2017

Abstract

The Ultra Compact Combustor (UCC) is a novel primary combustor system to replace more traditional axial combustors in jet engines. Utilizing highly centripetally loaded combustion products in a circumferential cavity, this combustor system offers potential improvements in engine performance with a substantially shorter combustion length. Using a circumferential cavity provides the required residence length and time while reducing the axial length required to achieve it. The Air Force Institute of Technology (AFIT) has been conducting experimental testing using an atmospheric UCC test rig. A recent transition in the rig to feeding the circumferential cavity and core flow from a common flow source has led to challenges in controlling the mass flow rate split between the cavity and core flow. A new variable geometry diffuser was designed and implemented to determine if correlations could be made between diffuser splitter position and cavity mass flow rate, tangential velocity, and thus g-load.

Comments

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Source Publication

55th AIAA Aerospace Sciences Meeting

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