Numerical modeling of natural gas combustion with hydrogen blending in SGT-800 heavy-duty gas turbine

LI Lixin; LIU Xingyu; ZENG Guofang; BAI Hongtao; YU Hongwei; LI Jing

doi:10.19666/j.rlfd.202303033

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Numerical modeling of natural gas combustion with hydrogen blending in SGT-800 heavy-duty gas turbine

更新时间：2025-09-28

- Numerical modeling of natural gas combustion with hydrogen blending in SGT-800 heavy-duty gas turbine
- Thermal Power Generation Vol. 52, Issue 12, Pages: 70-78(2023)
- 作者机构：
  
  1. 国家电投集团湖北分公司
  2. 华中科技大学电气与电子工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202303033
  CLC： TK16;TK471
- Published：2023
- 稿件说明：
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LI Lixin, LIU Xingyu, ZENG Guofang, et al. Numerical modeling of natural gas combustion with hydrogen blending in SGT-800 heavy-duty gas turbine[J]. Thermal power generation, 2023, 52(12): 70-78.
DOI：

LI Lixin, LIU Xingyu, ZENG Guofang, et al. Numerical modeling of natural gas combustion with hydrogen blending in SGT-800 heavy-duty gas turbine[J]. Thermal power generation, 2023, 52(12): 70-78. DOI： 10.19666/j.rlfd.202303033.

摘要

为了解贫燃预混燃气轮机燃烧室掺氢燃烧的性能变化及潜在风险，以西门子SGT-800型燃气轮机燃烧室为对象开展了天然气掺氢燃烧过程的数值模拟研究，考察了0、5%、10%、15%、30%（体积分数，下同）5种掺氢比例工况下燃烧室内的燃料着火、温度分布、火焰形态以及NO_x排放特性。研究表明：在当前燃烧室内开展掺氢燃烧，将导致燃料着火位置提前、温度峰值提高、火焰轴向长度变短，同时外侧值班火焰逐渐向中心混合管聚拢；在15%掺氢比例以下时燃烧室内的温度分布以及火焰形态不会发生明显变化，但在30%掺氢比例下混合管内燃料着火位置回缩严重，外侧值班火焰紧贴喷嘴出口，该工况存在回火风险；此外，燃烧室出口NO_x排放值随掺氢比提高而增大，在30%掺氢比下NO_x排放值接近国内部分地区限值，表明高NO_x排放也是制约燃气轮机高比例掺氢的因素之一。

Abstract

In order to understand the performance changes and potential risks of hydrogen assisted combustion in combustion chamber of a lean-combustion premixed gas turbine

a numerical simulation study of the hydrogen injection combustion process of natural gas was carried out in the combustion chamber of Siemens SGT-800 gas turbine. The fuel ignition

temperature distribution

flame formation and NO_x emission characteristics of the combustion chamber under five working conditions of 0

10%

15% and 30% were investigated. Studies have shown that hydrogen-doped combustion in the current combustion chamber will lead to an earlier ignition position of the fuel

an increase in temperature peaks

a shorter axial length of the flame

and a gradual convergence of the outer duty flame towards the central mixer. The temperature distribution and flame morphology in the combustion chamber will not change significantly when the hydrogen-doped ratio is below 15%

but the ignition position in the mixer tube is seriously retracted at 30% hydrogen-doped ratio

and the flame on the outside is close to the nozzle outlet

which has a risk of tempering. In addition

the NO_x emission value of the combustion chamber outlet increases with the hydrogen doping ratio

and the NO_x emission value exceeds the standard by nearly 1/3 at 30%hydrogen doping ratio

indicating that high NO_x emission is also one of the factors restricting the high proportion of hydrogen doping in gas turbines.

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