| Summary: | Fuel mixing and enhancement is the key technology of modern scramjet engine. In view of the problem of how to fully mix fuel, researchers have developed a variety of mixing enhancement technologies, which are mainly divided into active and passive types. Active mixing enhancement technology relies on large-scale self-excitation to improve the mixing degree of fuel, and is gradually favored by researchers because of its advantages of easy control and simple structure. This paper focuses on three active mixing enhancement technologies: plasma energy deposition assisted mixing technology, waveform/rough wall disturbed flow technology and pulse jet turbulence technology, summarizes their research status and development prospect, and makes a reasonable prospect for the future development trend, which provides ideas for the further optimization and development of fuel mixing enhancement technology in the future scramjet combustor.
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