dr.ir. J.B.W. Kok (Jim)

Jim Kok received his MSc degree in Mechanical Engineering in 1985 at the University of Twente (Enschede, NL). Subsequently he obtained his PhD degree at this university in 1989 on the subject of dynamics of gas bubbles moving through liquid. Subsequently he became a member of faculty. He performed research on turbulent combustion with application on gas turbine engines. Before 2000 the focus was on reduction of nitric oxide emission, but since then the interest focused on the interaction of combustion dynamics and acoustics and engine design and operation. The work involves both CFD modeling and experiments.His teaching includes courses on turbulent combustion theory, modeling and analysis for gaseous fuels and liquid fuels.

Engineering & Materials Science

# Acoustics
# Combustors
# Gas Turbines
# Large Eddy Simulation
# Thermoacoustics

Physics & Astronomy

# Burners
# Combustion Chambers
# Flames

Faculty of Engineering Technology (ET), Thermal Engineering (TE)

Research covers the fields of combustion dynamics, acoustics, heat transfer and thermodynamics. In numerical methods a compressible non-adiabatic reaction progress variable combustion model was developed that can be applied on turbulent flows with LES or RaNS approach. The experimental research includes work on an atmospheric combustor in limit cycle oscillation and a pressurized combustor using laser diagnostics and multi microphone techniques. Specific applications studied are gas turbine engine power generation and propulsion. The main theme is pressurized and atmospheric combustion of sustainable fuels in gas turbine (aero) engines and furnaces and boilers. Fuels can be low calorific gases, NH3, H2 of jet fuel. Important phenomena studied are combustion stability, transient combustion behavior and emission of toxic species

Hofsteenge, J. W. , & Kok, J. B. W. (2022). Performance of FGM in Bluff-Body Stabilized H2-CO Diffusion Flame. In Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine Article V002T03A015 American Society of Mechanical Engineers. https://doi.org/10.1115/GT2022-82937

Hofsteenge, J. W., Khourinia, A. G. , & Kok, J. B. W. (2022). Numerical Simulations of Heat Loss Effect on Premixed Jet Flame Using Flamelet Generated Manifold Combustion Model. Energies, 15(3), Article 730. https://doi.org/10.3390/en15030730

Arredondo, S. N. , & Kok, J. (2021). Statististical study of high amplitude oscillations in a premix combustor. In E. Carletti, M. Crocker, M. Pawelczyk, & J. Tuma (Eds.), "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021 Silesian University Press.

Ghasemi Khourinia, A. , & Kok, J. B. W. (2021). Numerical identification of precessing vortex core in an airblast swirl burner using POD. In E. Carletti, M. Crocker, M. Pawelczyk, & J. Tuma (Eds.), "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021 Article 172047 Silesian University Press.

Ghasemi, A. , & Kok, J. B. W. (2019). Numerical study of a swirl atomized spray response to acoustic perturbations. In Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019 (pp. 955-968). International Institute of Acoustics and Vibration (IIAV).

Arredondo, S. N. , & Kok, J. (2019). A model to study spontaneous oscillations in a lean premixed combustor using non linear analysis. In 26th International Congress on Sound and Vibration, ICSV 2019: Proceedings (pp. 969-976). Curran Associates Inc..

Farisco, F., Panek, L. , & Kok, J. B. W. (2018). Numerical simulation of sound propagation through the can-annular combustor exit. Acta Acustica United with Acustica, 104(4), 685-696. https://doi.org/10.3813/AAA.919208

Shahi, M. , Kok, J. B. W. , Roman Casado, J. C. , & Pozarlik, A. K. (2018). Strongly Coupled Fluid-Structure Interaction in a Three-Dimensional Model Combustor during Limit Cycle Oscillations. Journal of engineering for gas turbines and power, 140(6), Article 061505 . https://doi.org/10.1115/1.4038234

Fratalocchi, V. , & Kok, J. B. W. (2018). Ethanol turbulent spray flame response to gas velocity modulation. Combustion Theory and Modelling, 22(1), 91-109. Advance online publication. https://doi.org/10.1080/13647830.2017.1377848

Gövert, S., Mira, D. , Kok, J. B. W., Vázquez, M., & Houzeaux, G. (2018). The Effect of Partial Premixing and Heat Loss on the Reacting Flow Field Prediction of a Swirl Stabilized Gas Turbine Model Combustor. Flow, turbulence and combustion, 100(2), 503-534. https://doi.org/10.1007/s10494-017-9848-4

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