Part 1Flame speed factor

Part 1—Flame speed factor *The flame speed factor (S) of a gas is given by—

F = flame speed coefficient for each combustible component according to the table in Part 3 m = mole fraction of combustible component that has a flame speed coefficient Fm A = air requirement for each combustible gas component according to the table in Part 3 n = mole fraction of combustible component that has an Air requirement of An according to the table in Part 3 Z = the total mole fraction of inert gases (eg CO2, N2) Q = the mole fraction of oxygen present. 1 Based on Gilbert, M.G. and Prigg, J.A., Gas Council Research Communication GC35 (see Transactions of the Institution of Gas Engineers 1956/57). Part 2—Sooting index *The sooting index (I) of a gas is given by—

B = the sooting coefficient for each combustible component according to the table in Part 3 a = the volume per cent of component that has a sooting coefficient of Ba H2 = the volume per cent of hydrogen in the gas CO = the volume per cent of carbon monoxide in the gas O2 = the volume per cent of oxygen in the gas d = the relative density of the gas.