Friedolin STRAUSS, Luca BAUER, Nico FISCHER, Samuel MICHELFELDER, Christoph KIRCHBERGER

DOI Number: N/A

Conference paper: HiSST-2025-335

This publication presents selected results of an investigation into combustion processes and environmental impacts of ramjets and scramjets at the German Aerospace Center (DLR) within the European MORE&LESS project. It compares typical chemical exhaust gas compositions for the liquid hydrocarbon-based fuels tested, including pure laboratory hydrocarbons and so-called bio fuel / sustainable aviation fuel at a similar mass flow rate. Additionally, the static wall temperature and static wall pressure distributions for two different positions at the cavity injector are analysed for hydrocarbon-based fuels and gaseous hydrogen for comparison. Each of the different fuels shows a unique behaviour
in terms of flame / combustion zone position and effect on the wall pressure distribution. In general, the influence of the flame zone on the wall pressure decreases with increasing stagnation pressure of the test bench. In contrast the wall temperature increases with increasing stagnation pressure as more oxidiser from the hot gas main flow becomes available to the combustion process. The results correspond to the numerical simulations of project partners within More&Less in terms of flame position, but the findings need further detailed analysis.

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In Categories: 1.Events, 1.HiSST 2025, Propulsion Systems & Components
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