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    Results & Analysis: Test 1, V 10 M/s Manometer Height (Tube 20), 36.5 MM

    Uploaded by

    Zul Zulhilmi
    The document reports the results of two tests measuring pressure on a circular cylinder. In Test 1, the cylinder velocity was 10 m/s, and in Test 2 it was 20 m/s. For each test, pressure measurements were taken at 13 angles from 0 to 180 degrees. The data collected includes manometer readings, calculated pressure differences, and coefficient of pressure values. Graphs are presented showing how the coefficient of pressure varies with angle for each test.

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    Results & Analysis: Test 1, V 10 M/s Manometer Height (Tube 20), 36.5 MM

    Uploaded by

    Zul Zulhilmi
    21 views4 pages
    The document reports the results of two tests measuring pressure on a circular cylinder. In Test 1, the cylinder velocity was 10 m/s, and in Test 2 it was 20 m/s. For each test, pressure measurements were taken at 13 angles from 0 to 180 degrees. The data collected includes manometer readings, calculated pressure differences, and coefficient of pressure values. Graphs are presented showing how the coefficient of pressure varies with angle for each test.

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    results

    Original Title

    Results

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    The document reports the results of two tests measuring pressure on a circular cylinder. In Test 1, the cylinder velocity was 10 m/s, and in Test 2 it was 20 m/s. For each test, pressure measurements were taken at 13 angles from 0 to 180 degrees. The data collected includes manometer readings, calculated pressure differences, and coefficient of pressure values. Graphs are presented showing how the coefficient of pressure varies with angle for each test.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    21 views4 pages

    Results & Analysis: Test 1, V 10 M/s Manometer Height (Tube 20), 36.5 MM

    Uploaded by

    Zul Zulhilmi
    The document reports the results of two tests measuring pressure on a circular cylinder. In Test 1, the cylinder velocity was 10 m/s, and in Test 2 it was 20 m/s. For each test, pressure measurements were taken at 13 angles from 0 to 180 degrees. The data collected includes manometer readings, calculated pressure differences, and coefficient of pressure values. Graphs are presented showing how the coefficient of pressure varies with angle for each test.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 4

    RESULTS & ANALYSIS

    Test 1, V = 10 m/s

    Manometer height (tube 20), ℎ0 = 36.5 mm

    Angle, θ 𝑃 − 𝑃𝑂
    Location h (mm) ℎ − ℎ𝑜 (𝑚𝑚) 𝑃 − 𝑃𝑜 (𝑃𝑎)
    (°) 𝐶𝑃 = 𝐶𝑃 𝑐𝑜𝑠 𝜃
    1
    𝜌 𝑉2
    2

    1 0 36.7 0.2 2.0 0.00004 4.00 × 10−5

    2 15 36.8 0.3 3.0 0.00006 5.80 × 10−5

    3 30 37.0 0.5 5.0 0.00010 8.66 × 10−5

    4 45 37.6 1.1 11.0 0.00022 1.56 × 10−4

    5 60 37.8 1.3 13.0 0.00026 1.30 × 10−4

    6 75 37.7 1.2 12.0 0.00024 6.21 × 10−5

    7 90 37.6 1.1 11.0 0.00022 0.00

    8 105 37.6 1.1 11.0 0.00022 −5.69 × 10−5

    9 120 37.7 1.2 12.0 0.00024 −1.20 × 10−4

    10 135 37.6 1.1 11.0 0.00022 −1.56 × 10−4

    11 150 37.7 1.2 12.0 0.00024 −2.08 × 10−4

    12 165 37.6 1.1 11.0 0.00022 −2.13 × 10−4

    13 180 37.7 1.2 12.0 0.00024 −2.40 × 10−4

    Table 1: Result for Test 1


    Test 2, V = 20 m/s

    Manometer height (tube 20), ℎ0 = 36.3 mm

    Angle, θ 𝑃 − 𝑃𝑂
    Location h (mm) ℎ − ℎ𝑜 (𝑚𝑚) 𝑃 − 𝑃𝑜 (𝑃𝑎)
    (°) 𝐶𝑃 = 𝐶𝑃 𝑐𝑜𝑠 𝜃
    1 2
    2 𝜌𝑉

    1 0 36.7 0.4 4.0 0.00002 2.00 × 10−5

    2 15 36.8 0.5 5.0 0.00003 2.90 × 10−5

    3 30 37.8 1.5 15.0 0.00008 6.93 × 10−5

    4 45 39.2 2.9 29.0 0.00015 1.06 × 10−4

    5 60 40.4 4.1 41.0 0.00021 1.05 × 10−4

    6 75 39.8 3.5 35.0 0.00018 4.66 × 10−5

    7 90 40.0 3.7 37.0 0.00019 0.00

    8 105 39.9 3.6 36.0 0.00018 −4.66 × 10−5

    9 120 40.1 3.8 38.0 0.00019 −9.50 × 10−5

    10 135 39.9 3.6 36.0 0.00018 −1.27 × 10−4

    11 150 40.2 3.9 39.0 0.00020 −1.73 × 10−4

    12 165 39.9 3.6 36.0 0.00018 −1.74 × 10−4

    13 180 39.9 3.6 36.0 0.00018 −1.80 × 10−4

    Table 2: Result for Test 2


    SAMPLE CALCULATION
    For test 1 at location 4 (45°):

    ℎ − ℎ𝑜 = 37.6 𝑚𝑚 − 36.5 𝑚𝑚 = 1.1 𝑚𝑚

    𝑃 − 𝑃𝑜 = 𝜌 𝑔 ( ℎ − ℎ0 ) = (1000)(9.81)(0.0011) = 11 𝑃𝑎

    𝑃 − 𝑃𝑂 11
    𝐶𝑃 = = = 0.00022
    1 2 1
    𝜌 𝑉 (1000) (102 )
    2 2

    𝐶𝑃 𝑐𝑜𝑠𝜃 = (0.00022) cos 45 = 1.56 × 10−4

    For test 2 at location 4 (45°):

    ℎ − ℎ𝑜 = 39.2 𝑚𝑚 − 36.3 𝑚𝑚 = 2.9 𝑚𝑚

    𝑃 − 𝑃𝑜 = 𝜌 𝑔 ( ℎ − ℎ0 ) = (1000)(9.81)(0.0029) = 29 𝑃𝑎

    𝑃 − 𝑃𝑂 29
    𝐶𝑃 = = = 0.00015
    1 2 1 2
    (1000) (20 )
    2 𝜌𝑉 2

    𝐶𝑃 𝑐𝑜𝑠𝜃 = (0.00015) cos 45 = 1.06 × 10−4


    Test 1

    Graph of Coefficient of Pressure against Angle, θ (°)


    0.0003

    0.00025
    Coefficient of Pressure

    0.0002

    0.00015

    0.0001

    0.00005

    0
    0 20 40 60 80 100 120 140 160 180 200
    Angle, °

    Test 2

    0.00025

    0.0002
    Coefficient of Pressure,

    0.00015

    0.0001

    0.00005

    0
    0 20 40 60 80 100 120 140 160 180 200
    Angle, °

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