Lecture8_6 - 11/11/2010 AME 331 Introduction to Fluid...

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11/11/2010 1 AME 331 Introduction to Fluid Mechanics Chapter 8: Internal Incompressible Viscous Flow Prof. Jesse Little University of Arizona 11/12/10 1 Lecture Preview and Assignments Today 8.7-8.8 Read 8.8 for next time Do the Examples!!!!! HW 9 due today HW 10 posted later today, due next Friday 2
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11/11/2010 2 Exam 2 3 Review from Last Time Arranged energy equation to look like Bernoulli on one side and losses on the other Losses are due to conversion of mechanical energy to heat and loss due to heat transfer Hard to calculate so we lumped them together into head loss Head Loss Major Losses Minor Losses Friction factor and Moody Diagram with some associated analytical expressions Minor Losses today 4
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3 Calculation of Head Loss (8-7) Minor Losses In addition to the losses caused by the friction in a long section of straight pipe, other piping components placed in the pipeline also lead to pressure losses. These components include valves, elbows, contractions, expansions, tees, etc. Within these components, the flow is not fully developed and can be quite complex. Information on the pressure drop through such devices is given in non-dimensional parameters that are based on experimental data. You will need to look these up in the text most of the time 5 Calculation of Head Loss (8-7) There are a couple ways to express this Loss coefficient Equivalent length Look up values for K or L e /D There is quite a bit of variation on what these constants might be. Book has representative examples which are good enough for
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This note was uploaded on 08/25/2011 for the course AME 331 taught by Professor Zohar during the Fall '08 term at University of Arizona- Tucson.

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Lecture8_6 - 11/11/2010 AME 331 Introduction to Fluid...

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