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NO emission and enhanced thermal performances studies on Counter-flow Double-channel Hydrogen/Ammonia-fuelled microcombustors with Oval-shaped internal threads by He Zhao; Dan Zhao; Sid Becker; Yang Zhang is a Engineering article available to read on EtoBox.

What is NO emission and enhanced thermal performances studies on Counter-flow Double-channel Hydrogen/Ammonia-fuelled microcombustors with Oval-shaped internal threads about?

Micro-combustion systems play a critical role in powering microreactors, micropropulsion and other micro-energy conversion systems. In this work, we have numerically investigated a double-channel counter-flow micro-combustor fuelled by premixed ammonia/hydrogen/oxygen parametric to investigate both N O emissions and thermal performance. The model is used to examine the effects of 1) the inlet velocity, v in, and 2) the inlet equivalence ratio, φ . The enhanced thermal performance is quantified by the increased mean wall temperature and the increased wall temperature uniformity. We find that thermal performance increases with increasing v in . The maximum level of N O is present at v in = 2 m/s. Meanwhile, the mean wall temperature benefits from φ = 1, and further increases in equivalence ratio can lessen the uniformity of the wall temperature. Furthermore, more fuel-rich ammonia combustion can lead to a lower N O emission and improve the thermal performance. To enhance ammonia combustion, further investigations are conducted by blending with different molar fractions of H 2 ( X H 2 ) . It is found that mixing ammonia with more H 2 can stabilize micro-combustion, and increase the te

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Author

He Zhao; Dan Zhao; Sid Becker; Yang Zhang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)