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Droplet Burning Time (Contd.)
Recall,
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Burning constant for typical hydrocarbons
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-------(3) |
Fuel
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k 10-7 m2/s (Calculated)
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k 10-7 m2/s (Measured)
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Ethyl alcohol
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9.3
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8.1
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N-Heptane
|
14.2
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9.7
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ISO-Octane
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14.4
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9.5
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Kerosene
|
9.7
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9.6
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Benzene
|
11.2
|
9.7
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Toluene
|
11.1
|
6.6
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|
Using (1) & (2) in (3),
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-------(4) |
Expressing droplet diameter in terms of  ,
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-------(5) |
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| In this expression, varies linearly with time (See figure 32.3). Slope of the plot is the burning rate constant, K |
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-------(6) |
 |
Integrating (5) with time,
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 is law
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(Figure 32.3) |
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