Page 345 - Engine IQflip'21
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Gas Properties
Heating Value Methane Number Laminar Flame Speed
Calorific value and Determinant parameter Laminar flame speed is
thermal value indicate the for knocking resistance of the
energy content a gas. speed at laminar front at
of a gas. The former can It is comparable to the which the oxidation takes
be differentiated from the Octane Number of place.
later only through the gasoline and indicates the
heat of vaporization of the percentage methane
water resulting from volume ratio of a
combustion, the water is methane-hydrogen
in liquid form after it has mixture which, in a test
already liberated its engine and under
condensation heat. controlled conditions,
indicates the same
knocking resistance as
the gas to be tested.
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