This paper describes numerical simulation of triple flames for hydrogen-oxygen-diluent. Hydrogen is a fuel which does not emit CO2 when burned, and is therefore, expected to contribute to carbon neutrality. Knowledge about lifted flames is necessary for the safe use of hydrogen. A parallel flow, in which concentration between fuel and oxidizer (oxygen + diluent) changes linearly, is used. In this case, clear triple flame structure is formed on the downstream side. This study investigates hydrogen-oxygen-diluent triple flames with four diluents (N₂, He, CO₂, Ar), analyzing how diluents and inlet velocity affect flame lift-off height, heat release rate, and flame behavior.
Hayashi et al. (Wed,) studied this question.
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