Striations in Explosive Flames

Abstract

IN a recent paper by Egerton and Gates (Proc. Roy. Soc., A, 116, 516; 1927), reference is made to peculiarities exhibited by certain flame photographs (not reproduced) obtained, on a rapidly revolving film, when mixtures 1C₂H₂: 2·50₂: 10N₂ were ignited at one end of a closed cylinder 19 cm. long and of 10·7 cm. internal diameter, as follows: “Some of the photographs show distinct closely-spaced bands, indicating that the combustion has a vibratory character. The number of vibrations per second in the after-flame is about 2500, and the spacing is consistent with the view that successive sound waves are reflected from the end-plates”.