Low-swirl-stabilised iron-air flame (2018)

Combustion and Aerothermal
Engineering and Development

I provide engineering and development support for combustion and aerothermal projects. From conceptual design to hardware commissioning.

Combustor design

Combustion systems for gas turbines: fuel injectors, air distribution, fuel-air mixing and cooling concepts.

Simulation

CFD, heat transfer, flow networks, reactor networks, turbomachinery.

Testing & data analysis

Atmospheric and high-pressure combustion testing, instrumentation layout, data processing and analysis.

Project lead

Project lead in a development programme, full cycle from novel concepts to test campaigns.

How I can support

Test campaign support. Extra hands on a tight schedule. Test planning, instrumentation layout, hardware sourcing, manufacturing follow-up, through to execution, data processing and analysis.

Fixed scope project. A defined engineering question answered with a defined deliverable. For teams that need a specific problem solved without adding headcount.

Ongoing part-time. One or two days a week over a longer period, for teams that need combustion or aerothermal experience but not a full-time engineer.

I can work from my own office in Nijmegen or on site, whichever suits the work.

image — 4:3
combustor hardware or a CAD section
Combustor linerHardware

Design

  • Gas turbine combustion system scaling, from prototype to machine size
  • Sizing of fuel injectors and premixing channels; nozzles and manifolds
  • Fuel staging design: radial, circumferential and axial
  • Design of axial fuel staging system: 0D reaction kinetics, 1D flow network, 3D CFD, rig testing
  • Cooling features: effusion, impingement, louvre, thermal barrier coating
  • Pressurised and thermally loaded test rig parts (PED-compliant)
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reacting-flow or mixing field
Mixture fraction fieldCFD

Simulation

  • CFD: mixing, pressure loss, flow distribution, heat transfer, gas dispersion (ANSYS Fluent, Simcenter STAR-CCM+, CFX)
  • Combustion thermodynamics and reaction kinetics (Cantera)
  • Heat transfer modelling for predicting hardware temperature and thermal stress
  • Gas dispersion analysis of enclosures for ventilation design
  • 1D flow network modelling, correlating against flow bench data and rig data (AFT Arrow)
  • Turbomachinery: cycle calculations, meanline and throughflow modelling
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instrumented rig or flame photo
Instrumented burnerTest cell

Testing & data analysis

  • High-pressure combustion test campaigns: tuning, logging, mechanical lead and data processing.
  • Instrumentation layout: thermocouples, pressure taps, emission probes and optical probes
  • Flow bench testing, metering orifice scaling and tuning
  • On-site tuning, troubleshooting and root cause analysis
  • Python tooling for large datasets: reduction, correlation, plotting
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rig build or test campaign photo
Rig assemblyCampaign

Project lead

  • Technical lead of a development programme: planning, budget and risk management
  • Manpower, logistics and day-to-day execution
  • Outsourcing of hardware manufacturing, including supplier follow-up
  • Design reviews, reporting and technical decision making

Simulations run on the client's licence, or licence and compute costs are quoted separately.

About me

I am Bart Ruis. I work on combustion and aerothermal problems, from design and simulation to testing and analysis.

I spent five years at Hanwha Power (Thomassen Energy) on gas turbine combustion R&D, primarily developing hybrid combustors for natural gas and hydrogen. I worked in a small development team inside a large company. This meant startup pace and ownership backed by proven development procedures and senior engineers on hand. My work was split between the office, the workshop, the test cell and site.

I led Thomassen Energy's first atmospheric combustion test campaign at Centro Combustione Ambiente in Italy. I was one of three crew members on four high-pressure campaigns at DLR Cologne, and lead engineer on one. With three people you hold every role: mechanical, instrumentation, tuning and data processing. I performed gas turbine combustion tuning at three sites.

During my bachelor's, I co-founded the student team SOLID to accelerate the development of metal fuels as energy carriers. I dedicated one year full-time to this team as technical lead for developing a 100 kW demonstration system, working with partners from industry and academia. I designed and tested various prototypes of burners, a fuel dispersion system, an oxide separation system and a steam boiler. The team's aim was to bridge the gap between scientific development at the university and industrial application.

I finished my BSc in mechanical engineering at Eindhoven University of Technology, then took a MSc at KTH and ULiège with turbomachinery, fluid mechanics, heat transfer and aeromechanics as my main subjects.

I founded Ruis Engineering B.V. in August 2026 to provide specialised engineering services on a freelance basis.

BasedNijmegen, Netherlands

Full capability statement

Bart Ruis
Bart RuisMSc Mechanical Engineering

Professional indemnity and general liability insurance in place – conditions and scope on request