Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 01 Oct 2017 My Price 7.00

Pressurized water

EXAMPLE 7.7

 

Pressurized water is often available at elevated temperatures and may be used for space heat- ing or industrial process applications. In such cases it is customary to use a tube bundle in which the water is passed through the tubes, while air is passed in cross flow over the tubes. Consider a staggered arrangement for which the tube outside diameter is 16.4 mm and the

 

 

 

longitudinal and transverse pitches are SL = 34.3 mm and ST = 31.3 mm. There are seven rows of tubes in the airflow direction and eight tubes per row. Under typical operating condi- tions the cylinder surface temperature is at 70°C, while the air upstream temperature and velocity are 15°C and 6 m/s, respectively. Determine the air-side convection coefficient and the rate of heat transfer for the tube bundle. What is the air-side pressure drop?

 

 

 

 

 

 

 

 

Q86

7.1   Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with velocity of 1 m/s: atmospheric air, water, engine oil, and mercury.

(a)    For each fluid, determine the velocity and thermal boundary layer thicknesses at a distance of 40 mm from the leading edge.

For each of the prescribed fluids and on the same coordinates, plot the boundary layer thicknesses  as

a function of distance from the leading edge to a plate length of 40 mm.

Answers

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Status NEW Posted 01 Oct 2017 09:10 PM My Price 7.00

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