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Published byRosalind Hunter Modified over 8 years ago
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Harry Kucharczyk
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Need $438 Million spent on annual boating fuel (Lipton 95) 99.8% of goods are transported by ships Carbon Dioxide emissions continue to rise www.unido-ichet.org
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Knowledge Base Bulbous Bow o Reduces shock wave o Decrease in friction drag http://www.globalsecurity.org www.marinefirefighting.com
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Knowledge Base Micro Bubbles Inserted in the boundary layer Decreased viscosity and density of the fluid www.impactlab.com
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Literature Review McCormick and Bhattchara (73)- injected hydrogen micro bubbles into the turbulent boundary layer Madavan (84)- location and distribution of bubbles are essential Kato (94)- determined reduced skin friction drag by 80% through the use of micro bubbles Kodama (00)- performed experiments in a water tunnel with microbubbles generated in an air injection chamber by injecting air through a porous plate
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Do Ability Water Tunnel is accessible in the lab Boat has already been constructed Bulbous bow can easily be inserted into the boat Microbubbles can be made through a simple fish tank bubbler
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Purpose Examine the skin friction drag reduction with the use of active and passive flow control
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Bibliography Lipton, Douglas W., and Scott Miller. "Recreational Boating in Maryland: An Economic Impact Study, 1993-1994." 6 Mar. 1995. Maryland Marine Trades Conference. http://www.me.berkeley.edu/~liepmann/assets/papavasiliou_transducers01.pdf http://darwin.wcupa.edu/~biology/fish/pubs/pdf/ISSDR(drag%20reduction).pdf http://www.its.caltech.edu/~ferrante/PAPERS/Navigator-2006-af-se.pdf http://www.nmri.go.jp/turbulence/PDF/Kato.pdf
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