Abstract
The effect of flame configuration on combustor performance is analysed theoretically by assuming that chemical conversion commences when the premixed gaseous propellants pass through the flame surface. Hence the percentage conversion, which is indicative of performance, can be determined at any point downstream of the flame surface by considering the chemical law of mass action and assuming an integral order of reaction. Integration over the cross section of the combustor then yields the theoretical performance for any selected length of combustor. As could be expected, performance increases as the flame angle increases, and flame configurations resulting from annular flameholders are more efficient than the conventional V-gutter of conical flameholders. Qualitative confirmation of the trends, predicted theoretically, is provided by experimental data obtained from a 2 in. i.d. burner.
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