A combined experimental and numerical investigation of premixed flame-wall interaction in turbulent boundary layers
Lead Research Organisation:
University of Edinburgh
Department Name: Sch of Engineering
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Publications
Escofet-Martin D
(2021)
Ultrafast multi-photon excitation of ScVO$_4$:Bi$^{3+}$ for luminescence thermometry
Escofet-Martin D
(2021)
Ultrafast multi-photon excitation of ScVO 4 :Bi 3+ for luminescence thermometry
in Optics Letters
Morrisset D
(2024)
The relative position of pyrolysis onset and flame front location for downward flame spread
in Proceedings of the Combustion Institute
Nicolas A
(2022)
Wavelet-Based Optical Flow For High-Resolution Velocimetry In Wall-Bounded Fluid Flows
in Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Nicolas A
(2023)
Assessment and application of wavelet-based optical flow velocimetry (wOFV) to wall-bounded turbulent flows.
in Experiments in fluids
Ojo A
(2023)
High-precision 2D surface phosphor thermometry at kHz-rates during flame-wall interaction in narrow passages
in Proceedings of the Combustion Institute
Ojo AO
(2024)
Spatiotemporal Surface Temperature Measurements Resolving Flame-Wall Interactions of Lean H2-Air and CH4-Air Flames Using Phosphor Thermometry.
in Flow, turbulence and combustion
Padhiary A
(2024)
An experimental investigation of the thermal flame structure during side-wall quenching of a laminar premixed flame
in Proceedings of the Combustion Institute
| Description | We have discovered the fundamental cause of the deviation of the true hydrodynamic boundary layer from the established theory (referred to as Law of the Wall) for reacting flows. The strong deviation in flow acceleration and gas temperature imposed by the flame compresses the boundary layer during flame-wall interaction, and is a leading cause of why most numerical models fail to predict energy transfer at gas-solid interfaces for reacting flow systems. We have also quantified for the first time, the evolution of flame temperature as a flame experiences flame wall interaction and flame quenching. This information is vital for improving fundamental flame theory in wall bounded flows. |
| Exploitation Route | We are contributing experimental data to a database that allows numerical modellers to develop and validate numerical models for better predicting thermally reacting flows for the transport and energy sectors. The project is not yet finished and we have some more exciting results to add to this database, which will be available shortly once published. |
| Sectors | Aerospace Defence and Marine Energy Environment Transport |
| Description | Unresolved fluid mechanics at liquid/gas interfaces for PRIMary brEakup of atomizing sprays |
| Amount | £1,693,853 (GBP) |
| Funding ID | EP/Y028848/1 |
| Organisation | United Kingdom Research and Innovation |
| Sector | Public |
| Country | United Kingdom |
| Start | 08/2023 |
| End | 08/2028 |
| Title | Development of wavelet-based optical flow for turbulent wall bounded flows |
| Description | We have developed a wavelet-based optical flow platform for turbulent wall bounded flows. This platform provides high-resolution velocimetry measurements at improved accuracy over particle image velocimetry. The development has been appropriately assessed and rigorously tested in wall bounded flows. |
| Type Of Material | Technology assay or reagent |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| Impact | Our wavelet-based optical flow platform provides high resolution velocimetry measurements with high measurement accuracy in wall bounded turbulent flows. |
| URL | https://link.springer.com/article/10.1007/s00348-023-03594-y |
| Title | Novel thermographic phosphors |
| Description | Together with our collaborators, we have synthesized a new phosphor that has high temperature sensitivity. We have used this phosphor for high repetition rate measurements in order to resolve the temporal dynamics of flame-wall interactions in narrow passages. This has enabled novel applications of transient heat transfer and has provided the capability to estimate flame quenching distance in narrow channels. This feature allows novel measurements in locations with limited physical dimensions for most experimental measurements. |
| Type Of Material | Technology assay or reagent |
| Year Produced | 2021 |
| Provided To Others? | Yes |
| Impact | Transient heat transfer at surfaces is a significant contributor to energy inefficiencies, but it is not well understood. Measurement of transient heat transfer at surfaces will inform design of energy systems for increased efficiency. |
| Title | use of phosphor thermometry in flame spread applications |
| Description | We have capitalized on our development of 2D phosphor thermometry for applications of heat transfer during flame spread. The previous state-of-the-art of measuring surface temperature during flame spread is thermocouples. Thermocouples provide a single point measurement and disconnect from the surface as the material softens when a flame is nearby. Thus, only limited information can be gained from a thermocouple. We have shown the ability to provide a field measurement (i.e., 2D), which gives a measure of thermal gradients. We have also shown the ability to capture the temperature underneath the flame sheet, providing new measurement access to regions of the burning material. |
| Type Of Material | Technology assay or reagent |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| Impact | We have demonstrated the application and detailed assessment to measure surface temperature during flame spread using phosphor thermometry. This provides a 2D field measurement to resolve spatial gradients. This method also provides access to surface temperature in pyrolysis regions. |
| URL | https://www.sciencedirect.com/science/article/pii/S0016236124003478 |
| Description | Development of new temporal-domain CARS approach |
| Organisation | Lund University |
| Country | Sweden |
| Sector | Academic/University |
| PI Contribution | We have partnered with research collaborators at Lund University (Sweden) to help pioneer a novel temporal-domain coherent anti-Stokes Raman Spectroscopy (CARS) method to temperature and species concentration measurements. The Edinburgh team (i.e., myself and the post-doc on this project) used our CARS expertise from this current EPSRC project to drive the development of this new CARS approach. With improvement in imaging capabilities, we may be able to apply this method within this EPSRC project to resolve 2D temperature fields, for impressive studies related to energy transfer in thermal boundary layers. |
| Collaborator Contribution | We have helped develop the theory of this approach and participated in several measurement campaigns to provide proof-of-concept feasibility. |
| Impact | We have a paper current under review, and we hope to have many more papers to follow. We have presented this work at the ECONOS conference in Vienna, Austria in 2024, and will present at the ECONOS conference in Paris, France in 2025. |
| Start Year | 2024 |
| Description | Development of new thermographic phosphors |
| Organisation | Princeton University |
| Country | United States |
| Sector | Academic/University |
| PI Contribution | We have been collaborating with Dr. Chris Abrams (Princeton University, USA) and Dr. Benoit Fond (U. Magdeburg, Germany) for the development and novel applications of thermographic phosphors for wall temperature measurements under flame-wall interactions in two-walled passages. |
| Collaborator Contribution | Our partners have helped synthesize bespoke phosphors to improve the temperature sensitivity and luminescence characteristics for applications in high temperature environments. |
| Impact | Two papers thus far have been published on this work. Escofet-Martin D, Ojo AO, Peterson B. (2022) "Ultrafast multi-photon excitation of ScVO4:Bi3+ for luminescence thermometry", Optics letters, 47 (1), pp. 13-16; Ojo A, Escofet-Martin D, Abram C, Fond B, Peterson B. (2022), "Precise surface temperature measurements at kHz-rates using phosphor thermometry to study flame-wall interactions in narrow passages", Combustion and Flame. Another paper has been submitted and is under review. |
| Start Year | 2021 |
| Description | Development of new thermographic phosphors |
| Organisation | The Otto-von-Guericke University Magdeburg |
| Country | Germany |
| Sector | Academic/University |
| PI Contribution | We have been collaborating with Dr. Chris Abrams (Princeton University, USA) and Dr. Benoit Fond (U. Magdeburg, Germany) for the development and novel applications of thermographic phosphors for wall temperature measurements under flame-wall interactions in two-walled passages. |
| Collaborator Contribution | Our partners have helped synthesize bespoke phosphors to improve the temperature sensitivity and luminescence characteristics for applications in high temperature environments. |
| Impact | Two papers thus far have been published on this work. Escofet-Martin D, Ojo AO, Peterson B. (2022) "Ultrafast multi-photon excitation of ScVO4:Bi3+ for luminescence thermometry", Optics letters, 47 (1), pp. 13-16; Ojo A, Escofet-Martin D, Abram C, Fond B, Peterson B. (2022), "Precise surface temperature measurements at kHz-rates using phosphor thermometry to study flame-wall interactions in narrow passages", Combustion and Flame. Another paper has been submitted and is under review. |
| Start Year | 2021 |
| Description | Development of wavelet-based optical flow for wall bounded turbulent flows |
| Organisation | Technical University of Darmstadt |
| Country | Germany |
| Sector | Academic/University |
| PI Contribution | Using experiments performed by TU Darmstadt, my team in Edinburgh was able to produce a wavelet-based optical flow platform optimised for high resolution velocimetry measurements with high accuracy. This allows us investigate the turbulent transport within the boundary layer with unprecedented spatial resolution for a large field-of-view. |
| Collaborator Contribution | Our partners were the ones who performed the experimental measurements. The wavelet-based optical flow is effectively a sophisticated diagnostic in terms of post-processing experimental findings to resolve the flow field from tracer particles. |
| Impact | We have one publication in Experiments in Fluids, and are working on several more. We also have a conference publication that will be submitted in the next week from this collaboration. |
| Start Year | 2021 |
| Description | Partnership with Fire Science |
| Organisation | University of Edinburgh |
| Department | School of Engineering |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | The developments we have made to phosphor thermometry has helped establish a relationship with the Fire Science group here at U. Edinburgh. We have applied the developments of 2D phosphor thermometry to provide spatiotemporal measurements of surface temperatures during flame spread. With our measurements, we are able to provide a field measurement (i.e. 2D), providing access to temperature gradients. In addition, we are now able to access surface temperature measurements underneath a flame sheet, which has yet to be accomplished in flame spread research. We can now provide information of the pyrolysis region of a burning solid. These advancements are a big step change to Fire Science research. |
| Collaborator Contribution | My partners and I are exploiting this method to provide new information about physio-chemical processes that govern the speed at which a flame can spread across a solid. We hope to utilize other diagnostics being developed in the EP/V003283/1 project for future applications and proposals for Fire Science. |
| Impact | We have recently published a paper in FUEL about the assessment and application of 2D phosphor thermometry for downward flame spread, and we have submitted another publication, which has received positive reviews. |
| Start Year | 2023 |
| Description | Conference Presentation - Gordon Research Conference 2021 |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Professional Practitioners |
| Results and Impact | The following posters were presented at the virtual 2021 Gordon Research Conference on Laser Diagnostics in Energy and Combustion Science: "High-resolution velocimetry in wall-bounded flows using wavelet-based optical flow", by Alexander Nicholas & Brian Peterson "Ultrafast multi-photon excitation of ScVO4:Bi3+ for temperature measurements", David Escofet-Martin, Antony Ojo & Brian Peterson "High-speed spatially resolved 2D wall temperature measurements during flame-wall interaction in two-wall passages using phosphor thermometry", Antony Ojo, David Escofet-Martin & Brian Peterson. |
| Year(s) Of Engagement Activity | 2021 |
| Description | Invited talk at Lund University |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | I was invited to give a seminar about my research on optical diagnostic development for near-wall reacting flows at Lund University in Sweden. |
| Year(s) Of Engagement Activity | 2023 |
| Description | Invited talk at University of Stuttgart |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | Based on my plenary talk at the International Workshop on Near-wall Reactive Flows, I was invited to give a talk about our development of advanced diagnostics for heat transfer and fluid mechanics at University of Stuttgart in Germany. Stuttgart is very eager to collaborate on optical flow capabilities applied to droplet research. |
| Year(s) Of Engagement Activity | 2023 |
| Description | Lecturer at Summer School 2024 in Germany |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | I taught at the International Combustion Institute Summer School 2024. This was a three day summer school revolving around near-wall reactive flows, which is a central theme of the EPSRC project. |
| Year(s) Of Engagement Activity | 2024 |
| URL | https://www.tu-darmstadt.de/energy-and-environment/forschungsfeld_ee/news_ee/news_ee_details_441792.... |
| Description | Plenary Lecture at Darmstadt Engine Workshop |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Professional Practitioners |
| Results and Impact | Dr. Peterson gave a plenary lecture at the 10th Annual Darmstadt Engine Workshop help virtually in 2021 |
| Year(s) Of Engagement Activity | 2021 |
| Description | Talk at Int. Symposium on Combustion |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | We presented our paper on high-speed, 2D phosphor thermometry to investigate the dynamics of flame-wall interaction and its associated heat transfer at the International Symposium on Combustion in Vancouver Canada in July 2022. |
| Year(s) Of Engagement Activity | 2022 |
| URL | http://www.combustionsymposia.org/2022/ |
| Description | Workshop on Near-wall Reactive Flows |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Postgraduate students |
| Results and Impact | I gave a plenary talk at the 3rd International Workshop on Near-wall Reactive Flows held in November 2022 at Technical University Darmstadt, Germany. There were about 150 academics in attendance for this workshop. |
| Year(s) Of Engagement Activity | 2022 |
| URL | https://www.trr150.tu-darmstadt.de/der_sonderforschungsbereich/events_trr150/int_workshops/workshop_... |