Editing Combustion (section)

=== Gaseous fuels ===
Combustion of gaseous fuels may occur through one of four distinctive types of burning: [[diffusion flame]], [[premixed flame]], [[autoignitive reaction front]], or as a [[detonation]].<ref name=":0">{{Cite journal|last=Bradley|first=D|date=2009-06-25|title=Combustion and the design of future engine fuels|journal=Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science|language=en|volume=223|issue=12|pages=2751–2765|doi=10.1243/09544062jmes1519|s2cid=97218733}}</ref> The type of burning that actually occurs depends on the degree to which the [[fuel]] and [[oxidizer]] are mixed prior to heating: for example, a diffusion flame is formed if the fuel and oxidizer are separated initially, whereas a premixed flame is formed otherwise. Similarly, the type of burning also depends on the pressure: a detonation, for example, is an autoignitive reaction front coupled to a strong shock wave giving it its characteristic high-pressure peak and high [[detonation velocity]].<ref name=":0" />