RISE Leadership Academy Research: Air Entrainment by a Laminar Jet
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RISE Leadership Academy Research:Air Entrainment by a Laminar Jet
Arec JamgochianUMD Mechanical Engineering ’16Under auspices of Dr. Ken Kiger
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Research Background• Worked in the Hydrodynamics Lab under Dr. Ken Kiger• Entrainment is when air bubbles become trapped due• Unwanted entrainment causes the Metal Casting industry
millions a year• Also of interest to the Navy – air entrainment makes the path
of ships easily noticeable• Must figure out circumstances which air entrains
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Laminar Jet• How?• Disturbance pushes through surface water, jet pushes through
hemisphere, the new part created seals around and splits off.
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Research• Use jet assembly to create laminar flow
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Research• Use speakers to drive cup, making symmetric capillary
(surface) waves
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Research• Use other speaker to drive jet stand up-down, making waves
on the jet
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Research• Do the two processes together, driving both speakers at the
same frequency with a phase shift to determine when air entrains
• Record all using Phantom High-Speed Camera
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Problems• Things would keep breaking/leaking, proper parts took time to
arrive• Figuring out how to get to where the project had been left off• Reassembling structure, reprogramming electronics
• Process of jet assembly takes a long time• Needed more hours in the week
• Had to work with/around other student
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Leadership• Inside the lab, not a whole lot necessary• Making sure to find time to come in• Making sure to get needed parts
• Outside the lab, improved leadership a lot• VP of Society of Physics Students, VP of Armenian Student Union• Able to take more initiative to do more things at once
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Kouzes and Posner• Initially was best at Inspiring a Shared Vision, worst at
Encouraging the Heart• Realized how important appreciation is in everyday
interaction, and have started showing more appreciation for the people around me