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Novel wet combustion chamber concept CFD studies with triple water inlet

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  • Froissart, M.
  • Ochrymiuk, T.

Abstract

Presented wet combustion chamber concept contains several integrated elements, which altogether form a prototype able to reduce extremely high oxy-combustion temperatures (up to 2800 °C) in an elevated pressure above 10 bars. To enable such capability, liquid water is supplied directly into the combustor flame zone. This is obtained with the front spray injection and water permeation through the two separate liner segments, which are made of the ceramic matrix composite (CMC) porous medium. This material was developed by the aerospace industry to take advantage of the heat resistance and low density of ceramics while reducing the brittleness of its monolithic form. Taking various interactions into account, analysed model couples rapid oxy-combustion process with the instant water evaporation. Particularly important phenomena occur at the surfaces of water droplets penetrating the flame with the axial velocity of 100 m/s. Rapid evaporation of each of them induces significant mixing force driven by the local thermal gradients. For the nominal case, 3D results were validated against the 0D calculations. While the nominal water mass split is 14% at the front plus 86% at the liner, other supply ratios were taken into account and are reported in the results section. Combustion process was modelled with GRI-Mech 3.0 mechanism.

Suggested Citation

  • Froissart, M. & Ochrymiuk, T., 2023. "Novel wet combustion chamber concept CFD studies with triple water inlet," Energy, Elsevier, vol. 278(PA).
    • Handle: RePEc:eee:energy:v:278:y:2023:i:pa:s0360544223012483
    DOI: 10.1016/j.energy.2023.127854
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    1. Chen, Zhidong & Hou, Yichen & Liu, Mingyu & Zhang, Guoqiang & Zhang, Kai & Zhang, Dongke & Yang, Lijun & Kong, Yanqiang & Du, Xiaoze, 2022. "Thermodynamic and economic analyses of sewage sludge resource utilization systems integrating Drying, Incineration, and power generation processes," Applied Energy, Elsevier, vol. 327(C).
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