Evaluating Possibilities of the Modern Chemical Kinetic Mechanisms of Acetylene Oxidation in Simulating the Non-Stationary Combustion Processes

Abstract

Acetylene is characterized by high reactivity and appears to be one of the promising gas fuels. However, possible combustion regimes of such fuels require a comprehensive study to be widely introduced in practice. This work is devoted to analyzing the modern kinetic mechanisms of acetylene oxidation. Current approaches to numerical analysis of the gas-dynamic flows in chemically active gas mixtures are a powerful tool in solving many industrial and energy problems. Obtaining positive results of numerical simulation of the non-stationary combustion and detonation processes is impossible without the use of reliable and efficient kinetic mechanisms. Kinetic mechanisms were considered describing the acetylene oxidation. Eight most optimal mechanisms were studied to identify the possibility of their implementation in detailed simulation of the non-stationary combustion processes, in particular, in flame acceleration and transition to detonation. Ignition delay time and laminar burning velocity were calculated using a complete model of the reacting medium gas dynamics. To evaluate correctness of the ignition and combustion parameters obtained values, they were compared with the available experimental data. Based on the obtained results analysis, conclusions were made on the possibility of applying the kinetic mechanisms under consideration, taking into account the combustion parameters accuracy and the computational efficiency