Numerical simulation of combustion processes for hydrogen-air mixture in a variable cross-section pipe

Authors: Korshunova M.R.
Published in issue: #9(14)/2017
DOI: 10.18698/2541-8009-2017-9-165
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
Keywords: combustion, hydrogen-air mixture, gas dynamic computation, simulation of combustion in a pipe, reactor-based approach
Published: 14.09.2017

We used mathematical models of different orders to investigate various mechanisms of hydrogen oxidation kinetics. We considered the models of a closed adiabatic reactor, and one- and two-dimensional flow reactors. We accordingly selected chemical kinetic mechanisms from the list of those integrated in our hydrocode. We simulated flow and combustion processes in a variable cross-section pipe. We studied the effect the geometric parameters of the flow duct have on the gas dynamics inside it. We used thermodynamic equilibrium methods to compute a one-dimensional flow in the pipe. The results show that various mechanisms of chemical kinetics affect the integral characteristics of the flow and heat transfer in a variable cross-section pipe. We detect certain features of gas dynamics that affect combustion and ignition processes. A comparison to the one-dimensional technique shows a satisfactory agreement of the integral parameters.

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