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    Velocity Measurement

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    SHERWIN MOSOMOS
    To determine the static, dynamic and total pressures across an air duct as measured by U-tube manometer using different manometric fluids.

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    © All Rights Reserved
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    Velocity Measurement

    Uploaded by

    SHERWIN MOSOMOS
    81 views3 pages
    To determine the static, dynamic and total pressures across an air duct as measured by U-tube manometer using different manometric fluids.

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    Velocity measurement

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    © © All Rights Reserved

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    To determine the static, dynamic and total pressures across an air duct as measured by U-tube manometer using different manometric fluids.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    81 views3 pages

    Velocity Measurement

    Uploaded by

    SHERWIN MOSOMOS
    To determine the static, dynamic and total pressures across an air duct as measured by U-tube manometer using different manometric fluids.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 3

    MEASUREMENT OF STATIC, DYNAMIC AND TOTAL PRESSURE

    I. Objective:
    1. To determine the static, dynamic and total pressures across an air duct as measured
    by U-tube manometer using different manometric fluids.

    II. Theory and Analysis:


    Discuss the principle of static, dynamic and total pressure measurement across air ducts.

    III. Equipment, Instruments, materials and Apparatuses ( explain the use/purpose of each
    instrument/materials in the experiment.
    Air Flow Apparatus
    Pitot tube
    U-tube manometer
    water, Diesel oil, gasoline
    Orifices with varying sizes
    Steel tape measure
    Hydrometer
    Graduated Cylinder

    IV. Drawing/Set up:


    Draw the actual set-up of the experiment. Label the parts.
    Draw the Pitot tube available in the laboratory. Label its parts

    V. Procedures:
    A. Measurement of total pressure:
    1. Mount the pitot tube in the hole provided in the duct with the pitot tube facing
    the blower.
    2. Connect one end of the rubber tubing to the shorter nipple of the pitot tube and
    connect the other end of the rubber tubing to one of the legs of the U-tube with
    the proper liquid already inside the manometer.
    3. Start the blower and measure the difference in level of fluids between the two
    legs of the manometer. Record it as PT.
    4. Make three trials using varying outlet areas.
    5. Repeat the procedure using the different fluids available.

    B. Measurement of static pressure:


    1. Repeat procedure A except that one end of the rubber tubing is connected to the
    longer nipple of the pitot tube.
    2. Record all readings as Ps.
    C. Measurement of dynamic/velocity pressure:
    1. Repeat procedure A except that two rubber tubes are used. One rubber tubing
    connects the longer nipple of the pitot tube and one leg of the manometer while
    the other rubber tube connects the shorter nipple of the pitot tube and the other
    leg of the manometer.
    2. Record all readings as Pv.
    VI. Data and Results:

    A. Orifice Sizes

    RUN 1 2 3 4
    ORIFICE DIA. (mm)
    AREA (mm2)
    % FULL OUTLET

    B. Static, Velocity and Total Pressure Measurement:

    RUN 1 2 3 4
    HEAD PRESS. HEAD PRESS. HEAD PRESS. HEAD PRESS.
    PRESSURES
    (mm) Paskal (mm) Paskal (mm) Paskal (mm) Paskal
    PS
    DIESEL
    PV
    OIL
    PT
    PS
    GASOLINE PV
    PT
    PS
    WATER PV
    PT

    VII. Computations:

    VIII. Discussion and Conclusion:

    IX. Research Questions:


    1. Discuss and illustrate the principle behind differential manometers.
    2. Define and give the relations of the following:
    a) Static Pressure
    b) Velocity Pressure
    c) Total Pressure
    3. Discuss the Bernoulli’s equation and its derivation.
    4. Discuss the effect of altitude on pressure measurement.
    5. What is the Dalton’s law of partial pressure? Explain.
    6. Illustrate, discuss the principle of operation and applications of the different
    pressure measuring instruments.
    X. References:
    Book title, Author, Publisher, Edition, page/pages
    Internet website.

    XI. Appendix:
    Attach pictures during the experiment.

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