Lecture_08312009_Compatibility_Mode_

Lecture_08312009_Compatibility_Mode_ - ENGR 301 ENGR 301...

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NGR 301 ENGR 301 Thermodynamics 8/31/2009 Madison 201 MW 12:00 – 1:15 PM ENGR 301
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What type of properties are temperature and pressure? Intensive Units of temperature 0 C, 0 F, K, R How do you measure temperature? Thermometer Thermister Thermocouple Infrared radiation ENGR 301
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Pressure Force/area Units of pressure N/m 2 or Pa or kg/m.s 2 Bar 100,000 Pa tm 01 325 Pa Atm 101,325 Pa psia 14.7 psi = 1 atm Gage pressure = absolute pressure - atmospheric pressure Vacuum pressure atmospheric pressure bsolute pressure = atmospheric pressure – absolute pressure How do you measure pressure? Manometer Pressure gage Pressure transducer train- age ENGR 301 Strain gage Piezoelectric
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Pressure is same at all points on a horizontal plane in a given fluid regardless of geometry as long as the points are interconnected by the gg y g p y same fluid. ENGR 301
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Pascal’s law : Pressure applied to a confined fluid increases pressure throughout by the same amount. ENGR 301
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MANOMETER P B P 1 = P 2 = P B + ρ g h What is the pressure in the gas? ENGR 301 pg
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P A = P 1 + ρ 1 g (a+h) = P + a + h P B P 2 ρ 1 g a ρ 2 g h P A = P
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Lecture_08312009_Compatibility_Mode_ - ENGR 301 ENGR 301...

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