Work

Measurements of CO and NOx Emissions From Premixed Turbulent Methane/Hydrogen Flames

Year: 2025

Type: article

Abstract: This paper presents measurements of the sensitivity of NO and CO emissions from H2/CH4 combustion to variations in turbulence intensity. Existing studies of exhaust emissions either focus on laminar modeling and measurements or report device-level measurements from practical combustors. However, there are limited fundamental studies of emissions characteristics of turbulent systems, the focus of this study. Because of the strong stretch sensitivity of these mixtures, local temperatures/reaction rates along the turbulent front can differ markedly from mixture-averaged properties, and they are very sensitive to turbulence. Single-point emissions measurements are presented for turbulent premixed H2/CH4 flames from a contoured nozzle Bunsen burner with variable turbulence. Emissions are measured at varying residence times and incoming flow turbulence intensities. Data show the clear benefit of H2 blending on CO emissions, both due to the expected reduction in C atoms, but also due to faster relaxation of flame generated CO toward equilibrium. It also shows negligible impact of turbulence intensity on NO emissions at constant CO for CH4.

Source: Journal of Engineering for Gas Turbines and Power

DOI: 10.1115/1.4069625

Authors: Hari Priya Rajagopalan, Ben Emerson, Vishal Acharya, David Noble, Tim Lieuwen

Institutions: Georgia Institute of Technology, Electric Power Research Institute

Language: English

Topic: Combustion and flame dynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: hybrid

Funder: U.S. Department of Energy