Combustion Efficiency Data for Liquid-Fueled Ramjets

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NASA's X-43A Hypersonic Flight Program (Image Credit: NASA).

Posted on October 5, 2021 | Completed on August 17, 2021 | By: Taylor H. Knight

How can combustion efficiency be estimated for a liquid-fueled ramjet with a given combustor length or bulk flow residence time flying in the Mach 2-3 range?

The Defense Systems Information Analysis Center (DSIAC) was asked how combustion efficiency can be estimated for a liquid-fueled ramjet flying in the Mach 2-3 range with a given combustor length or bulk flow residence time.  In particular, DSIAC was asked for some sort of data or an empirical/analytical model that has been validated with data, rather than non-computational fluid dynamics solutions, that can be used to predict how performance of a ramjet combustor could change over a range of operating conditions.  DSIAC was able to find relevant information that was further augmented with input from the DSIAC community via an Active Inquiry.

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