Tomoaki NARA, Chihiro FUJIO, Hideaki OGAWA

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST 2024-0080

Fuel mixing plays a key role in efficient supersonic combustion and is the focus of scramjet research worldwide. Among various fuel mixing techniques, mixing enhancement via shock-wave impingement is a promising approach due to high mixing efficiency and ability to promote ignition and stable combustion. Cavity flame holders are recognized as an effective means to sustain the ignition zone as well as mixing promotion. The present study is undertaken to perform a multi-objective optimization of the combination of shock induced mixing enhancement and cavity flame holding and to obtain physical insight from the optimization results. Optimization has been performed for a two-dimensional combustor using a cavity with a wedge-shaped backward-facing step by means of an evolutionary algorithm in conjunction with deep-learning-based flowfield prediction. It has been found that the flowfield and performance are mainly influenced by the location of the cavity flame holder as well as the location of the oblique shock impingement on the mixing region. The design optimization has also revealed several desirable geometric arrangements.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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