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Experimental and numerical prediction of LBO performance in a centrally staged combustor by Chengjun Wang; Weihang Liu; Zhengyanlong Bi; Guowen Li; Wen Zeng is a Engineering article available to read on EtoBox.

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A new type of centrally staged combustor was proposed for an aeroengine combustor with a fuel–air ratio of 0.037. The combustor dome comprised a three-stage swirler, which included a pilot stage and main stage. The pilot stage was composed of Stage 1 and Stage 2 swirlers, and all swirlers were radial. The effects of different inlet Reynolds numbers and swirler structural parameters, including the installation angle of the first radial swirler, installation angle of the second radial swirler, installation angle of the main stage, and co– and counter-rotation of Stage 1 and Stage 2 swirlers on the lean blow-out (LBO) performance of the centrally staged combustor were examined at an atmospheric pressure and inlet temperature of 473 K. Experiments with single-dome rectangular test pieces and numerical methods were used. The results showed that the fuel–air ratio decreases with an increase in the inlet Reynolds number, indicating that the increase in inlet Reynolds number plays an important role with respect to the LBO. When the rotation directions of Stage 1 and Stage 2 swirlers were opposite, the fuel–air ratio of the LBO was smaller than that of Stage 1 and Stage 2 swirlers in the sa

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Author

Chengjun Wang; Weihang Liu; Zhengyanlong Bi; Guowen Li; Wen Zeng

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)