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就狭义而言,燃烧可以理解为任何物质和气态分子氧的化合,此时燃烧生成物是燃烧物质的氧化物。对发动机来说,有意义的只是快速燃烧,即在出现火焰时形成适宜于迅速氧化的物质并尽可能导致完全燃烧的产物。为了使发动机的燃烧达到所需的高速,在燃料和氧之间要有很大的接触面,因此需要将送到发动机中燃烧的液体燃料雾化,将气体燃料和空气均匀混合。
In a narrow sense, combustion can be understood as the combination of any substance with gaseous molecular oxygen, where the combustion product is an oxide of the combustion material. What makes sense to the engine is only rapid combustion, which is the formation of a product suitable for rapid oxidation in the event of a flame and, as far as possible, a complete combustion. In order for the engine to burn to achieve the desired high speed, there must be a large interface between the fuel and the oxygen and the liquid fuel that is being burned in the engine needs to be atomized to mix the gaseous fuel with the air evenly.