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Investigation on flow distribution of the fuel supply nozzle in the annular combustor of a micro gas turbine

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  • Do, Kyu Hyung
  • Kim, Taehoon
  • Han, Yong-Shik
  • Choi, Byung-Il
  • Kim, Myungbae

Abstract

The flow distribution of the fuel supply nozzle in the combustor of a 500 W micro gas turbine was investigated. Numerical simulation was performed. Numerical results for flow distribution of the fuel supply nozzle were validated from the corresponding experimental data. Based on the validated numerical model, the effects of the nozzle diameter, inlet mass flow rate, fuel temperature, and types of fuel on the flow distribution were examined. In order to quantitatively evaluate the non-uniformity of flow distribution, the relative flow non-uniformity parameter was introduced. Furthermore, the pressure drops between the inlet and outlet of the fuel supply nozzles were experimentally and numerically obtained. In the aspect of both the uniform flow distribution and lower power consumption of the pump, all nozzles with 500 μm in diameter are appropriate for the fuel supply nozzle of the micro gas turbine. In addition, a simple method was developed to determine the geometry of the fuel supply nozzle with variable nozzle diameters which could achieve the uniform flow distribution. Finally, it was confirmed that the uniformity of the flow distribution can be improved without the increase of the pressure drop by applying the variable nozzle diameters into the fuel supply nozzle design.

Suggested Citation

  • Do, Kyu Hyung & Kim, Taehoon & Han, Yong-Shik & Choi, Byung-Il & Kim, Myungbae, 2017. "Investigation on flow distribution of the fuel supply nozzle in the annular combustor of a micro gas turbine," Energy, Elsevier, vol. 126(C), pages 361-373.
    • Handle: RePEc:eee:energy:v:126:y:2017:i:c:p:361-373
    DOI: 10.1016/j.energy.2017.03.036
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    References listed on IDEAS

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    Cited by:

    1. Zong, Chao & Ji, Chenzhen & Cheng, Jiaying & Zhu, Tong & Guo, Desan & Li, Chengqin & Duan, Fei, 2022. "Toward off-design loads: Investigations on combustion and emissions characteristics of a micro gas turbine combustor by external combustion-air adjustments," Energy, Elsevier, vol. 253(C).
    2. Dabiri, Soroush & Hashemi, Mohammadreza & Rahimi, Mohammadfazel & Bahiraei, Mehdi & Khodabandeh, Erfan, 2018. "Design of an innovative distributor to improve flow uniformity using cylindrical obstacles in header of a fuel cell," Energy, Elsevier, vol. 152(C), pages 719-731.
    3. Asgari, Behrad & Amani, Ehsan, 2017. "A multi-objective CFD optimization of liquid fuel spray injection in dry-low-emission gas-turbine combustors," Applied Energy, Elsevier, vol. 203(C), pages 696-710.

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