Title: An investigation of ammonia primary flame combustor concepts for emissions reduction with OH*, NH2* and NH* chemiluminescence at elevated conditions - data


Citation
Bowen PJ, Giles AP, Marsh R, et al. (2020). An investigation of ammonia primary flame combustor concepts for emissions reduction with OH*, NH2* and NH* chemiluminescence at elevated conditions - data. Cardiff University. http://doi.org/10.17035/d.2020.0115660514



Access Rights: Data is provided under a Creative Commons Attribution (CC BY 4.0) licence

Access Method: Click to email a request for this data to opendata@cardiff.ac.uk


Dataset Details

Publisher: Cardiff University

Date (year) of data becoming publicly available: 2020

Coverage start date: 29/10/2019

Coverage end date: 01/11/2019

Data format: .xlsx, .mat

Software Required: Matlab (image accessible as table in other software)

Estimated total storage size of dataset: Less than 1 gigabyte

Number of Files In Dataset: 60

DOI : 10.17035/d.2020.0115660514

DOI URL: http://doi.org/10.17035/d.2020.0115660514


Description

Data comprises optical an experimental data captured throughout the experimental programme, and accessible in two formats:

Captured emissions data is presented in a spreadsheet. This is comprised of flow data for each experimental condition, with relevant units presented, alongside the data captured from each emissions analyser for that condition. The data have been normalised to equivalent dry 15% O2 conditions.

Optical data is also presented for each relevant condition. This is given in the form of a numerical array, corresponding to averaged/deconvoluted chemiluminescence pixel intensity, and will need to be viewed using a numerical program e.g. MATLAB. The naming convention is as follows:

Test point_Date_Fuel type_Equivalenace ratio_tempterature point_chemiluminescent species

Further information about each experimental condition can be found in the paper, available 'Green' open access, with the abstract provided below:

With developing interest in NH3 as a prospective energy carrier, combustor designs and fuelling concepts require optimisation to reduce NOx emissions. Through the introduction of staged combustor concepts, pathways have previously been identified that limit NOx production whilst improving combustor efficiency and reducing unburned NH3. However, the efficacy of secondary air staging is sensitive to the primary flame behaviour, and whilst low NOx emissions can be achieved at rich conditions, high unburned NH3 leads to greater global NOx concentrations from downstream production. Here, time-resolved OH*, NH2* and NH* chemiluminescence were employed together for the first time for NH3-air and NH3single bondH2-air flames to investigate a primary flame configuration that produced the lowest combined emissions concentration. A generic, fuel-flexible burner was developed to enable partial and full premixing, together with operation of a swirl-stabilised non-premixed flame. Initially, NH3single bondH2-air flames were employed in a range of configurations and produced markedly different chemiluminescence and emissions results as functions of global equivalence ratio. The performance of a pure NH3-air flame was subsequently investigated and compared to the blended fuel results. Optical trends complemented changes in sampled exhaust emissions, enabling analysis of intermediate chemistry. Burner inlet temperature and pressure were then increased proportionally to maintain equivalent bulk nozzle exit velocities. Contrasting trends were identified as functions of fuel composition and equivalence ratio, with a comprehensive database of optical and analytical results generated. Results obtained for NH3single bondH2-air suggest the most favourable configuration resulted from a partially premixed flame employing H2 as a pilot, operating under rich conditions (Φ=1.2). However, at higher temperatures and pressures, the trends observed for non-premixed NH3-air flames will lead to superior performance, particularly with a small increase in equivalence ratio.

Research results based upon these data are published at https://doi.org/10.1016/j.proci.2020.06.310


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Last updated on 2021-16-09 at 14:35