MENG203 EXPERIMENTAL METHODS FOR ENGINEERS

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ASSOC.PROF.DR.HASAN HACIŞEVKİ

PRESSURE, FLOW AND TEMPERATURE MEASUREMENT

WHAT IS PRESSURE? PRESSURE IS THE FORCE PER UNIT AREA. 1) ABSOLUTE PRESSURE: IS THE ABSOLUTE

FORCE PER UNIT AREA EXERTED BY FLUID ON THE CONTAINING WALL BY A FLUID.

2) GAGE PRESSURE: REPRESENTS THE DIFFERENCE BETWEEN ABSOLUTE PRESSURE AN LOCAL ATYMOSPHERIC PRESSURE.

3) VACUM PRESSURE: REPRESENTS THE AMOUNT BY WHICH THE ATMOSPHERIC PRESSURE EXCEEDS THE ABSOLUTE PRESSURE.

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SOME COMMON PRESSURE UNITS

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GRAPHICAL REPRESENTATION OF THREE PRESSURES

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MECHANICAL PRESSURE MEASUREMENT DEVICES

1) MANOMETER 2) BOURDON TUBE GAUGE 3) DIAPHRAGM AND BELLOW S GAUGE

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1) U - TUBE MANOMETER

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SENSITIVITY OF U TUBE MANOMETER

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EXAMPLE: 1

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EXAMPLE 2:

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EXAMPLE:

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FLOW MEASUREMENT

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EXAMPLE

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FLOW OBSTRUCTION METHODS

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EXAMPLE

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