Numerical modeling of lean, premixed, pressurised hydrogen flames using large eddy simulation

Blending methane with hydrogen for power generation is well-known to significantly lower carbon-based emissions. However, studies have shown that implementing hydrogen is not trivial. In gas turbine combustion systems, major modifications may be required to facilitate the safe combustion of hydrogen and these modifications depend on numerical modeling.

Turbulent combustion modeling can strongly accelerate the time to implement decarbonised technology but industrial practices are typically validated and optimised for natural gas burning, These require thorough checks to ensure they can be used to model hydrogen-specific phenomena. For example, Hydrogen’s mass diffusion occurs at a higher rate relative to thermal (heat) diffusion, leading to flame instabilities at lean conditions. Pressure exacerbates these but research is scarce at gas turbine-relevant conditions.

This project will explore the usage of industrial models to investigate H2 flame dynamics under pressure. By comparing with publicly-available experimental data, modifications will be introduced to these models. The main objective of this project is to identify the limits of modeling hydrogen by current industrial methods, and then assess newer strategies that incorporate hydrogen physics more explicitly. This will result in clear recommendations for changes to industrial practices and enable the development of future injector technology.

Faculty Supervisor:

Jeffrey Bergthorson

Student:

Partner:

Siemens Canada (Dorval, QC)

Discipline:

Engineering

Sector:

Information and cultural industries; Manufacturing; Professional, scientific and technical services

University:

McGill University

Program: