Class2_pressure_manometers

Class2_pressure_manometers - ES330, Section 2 Dr. Douglas...

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9/4/2007 1 ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, dbohl@clarkson.edu www.clarkson.edu/~dbohl/es330
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9/4/2007 2 Class Outline Definition of pressure – Show it is a scalar property Pressure in a non-moving fluid – Force is equal to the total weight of the fluid above Manometers –S im p l e – compound Learning objectives for today – Calculate the hydrostatic pressure at any point in a fluid – Analyze a fluid manometer
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9/4/2007 3 USS Thresher • April 10, 1963 SSN-593 was under going sea trials after overhaul and before being deployed • They lost power and sank below their crush depth • All hands were lost Lt. CMD John Harvey
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9/4/2007 4 USS Thresher 7:47 AM: Thresher begins its descent to the test depth of 1300 feet. 7:52 AM: Thresher levels off at 400 feet, contacts the surface, and the crew inspects the ship for leaks. None are found. 8:09 AM: Commander Harvey reports reaching half the test depth. 8:25 AM: Thresher reaches 1000 feet depth. 9:02 AM: Thresher cruises at 18 knots. Commander Harvey orders a course change: "Twenty degrees right rudder and five degrees down angle." 9:09 AM: A pipe bursts in the engine room, crew attempts to stop the leak while the room is filled with a cloud of mist. Harvey orders full speed, upward tilt of 15 degrees, and emptying the main ballast tank in order to surface. Due to Joule-Thomson effect , the pressurized air rapidly expanding in the pipes cools down, condensing moisture and depositing it on the filters installed in the valves; in about 90 seconds the moisture freezes, clogging the filters
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Class2_pressure_manometers - ES330, Section 2 Dr. Douglas...

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