2012 BFY Abstract Detail Page
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||The supersonic blowdown tunnel: a flexible apparatus for open-ended undergraduate research
||A fall 2010 student project in the Bethel University (BU) PHY420 Fluid Mechanics course was directed towards the design, construction, and initial testing of a small supersonic blowdown tunnel. The blowdown tunnel consists of high and low pressure reservoirs connected by a converging-diverging nozzle that can sustain a supersonic flow for about two seconds. Since its initial design, the blowdown tunnel has received a number of improvements that make it a useful platform for further open-ended student projects in BU advanced lab courses. The tunnel allows for a variety of studies involving high speed compressible flows. Preliminary studies have utilized high-speed video (HSV) shadowgraph imaging and piezoelectric pressure measurements with a LabVIEW interface to examine and compare the flow with numerical results from a MATLAB generated model of the system. The preliminary student studies, along with the flexibility of the blowdown tunnel apparatus, provide upper level students with the opportunity to design a variety of supersonic flow experiments in BU advanced lab courses.
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3900 Bethel Drive
Benjamin Heppner, Pengxue Her, Keith Stein, Mark Turner