Verification, Validation and Testing of Kinetic Mechanisms of Hydrogen Combustion in Fluid Dynamic Computations

TL;DR

This paper evaluates various hydrogen oxidation kinetic schemes in CFD simulations, introduces a new skeletal scheme, and compares computational results with experimental data to assess accuracy and computational efficiency.

Contribution

A new skeletal kinetic scheme for hydrogen oxidation is developed and its performance is compared with existing schemes in CFD simulations.

Findings

The new skeletal scheme shows comparable accuracy to detailed schemes.

Computational cost varies significantly with kinetic scheme complexity.

Optimal grid and timestep settings balance accuracy and efficiency.

Abstract

A one-step, a two-step, an abridged, a skeletal and four detailed kinetic schemes of hydrogen oxidation have been tested. A new skeletal kinetic scheme of hydrogen oxidation has been developed. The CFD calculations were carried out using ANSYS CFX software. Ignition delay times and speeds of flames were derived from the computational results. The computational data obtained using ANSYS CFX and CHEMKIN, and experimental data were compared. The precision, reliability, and range of validity of the kinetic schemes in CFD simulations were estimated. The impact of kinetic scheme on the results of computations was discussed. The relationship between grid spacing, timestep, accuracy, and computational cost were analyzed.