We will now look at the injection of the fuel asa droplet into the heated combustion chamber.At a temperature well above the ignition point, theextreme outer surface of the droplet immediatelystarts to evaporate, surrounding the core with a thinfilm of vapour. This involves a supply of heat fromthe air surrounding the droplet in order to supplythe latent enthalpy of evaporation. This supply ismaintained by continuing to draw on the mainsupply of heat from the mass of hot air
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