Affiliation:
1. Xiangtan University, School of Mechanical Engineering and
Abstract
<div class="section abstract"><div class="htmlview paragraph">At present, the problem of global warming is becoming more and more serious, and
the transformation of energy structure is very important. The rotary engine has
the advantages of small size, high power-to-weight ratio, and high fuel
adaptability, which makes it promising for application in the fields of new
energy vehicle range extender and unmanned aerial vehicle. To this end, this
paper proposes the idea of hydrogen/ammonia dual-fuel combination applied to
rotary engine, using the experimentally verified three-dimensional simulation
model of rotary engine, to study the process of hydrogen/ammonia rotary engine
in-cylinder mixture formation under the direct-injection dilute combustion mode,
and to analyze the impact of different dual-fuel injection strategies on the
performance of rotary engine, and finds that delaying the moment of injection
leads to the ammonia concentration in the middle and front of the combustion
chamber; when the ammonia nozzle is located in the intake port, the effect of
different ammonia injection moments on the hydrogen distribution is not
significant, and the hydrogen distribution is basically the same, mainly in the
middle and front part of the combustion chamber, and the ammonia is uniformly
distributed in the combustion chamber; when the ammonia nozzle is located in the
upper part of the cylinder block, with the delay of the ammonia injection
moments, the distribution of hydrogen in the rear part of the combustion chamber
is increased; when the ammonia nozzle is located in the lower part of the
cylinder block, the effect of the ammonia injection on the distribution of
hydrogen is not significant. In this paper, the in-cylinder flow process of
hydrogen/ammonia fuel rotary engine is investigated, and the results can provide
theoretical guidance and reference significance for the in-cylinder flow of
hydrogen/ammonia fuel rotary engine.</div></div>