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在25和33 mm两种导叶间距、进口流速分别为2.5、3.0和3.5 m/s的工况下,对燃气轮机的惯性级导叶进行盐雾分离特性的研究。首先由实验得出该惯性级导叶的分离特性数据,再通过离散相数值模拟定性分析装置流道内分离盐分的主要机理和影响分离特性的因素。比较实验数据和数值模拟结果得出:该惯性级分离装置分离效率约为97%,最大值为98.71%,最小值为95.90%,接近完全分离效果;导叶间距增大分离效率会有下降,分离效率会随初始进口速度增加有提升。
Under the operating conditions of 2.5, 3.0 and 3.5 m / s of 25 and 33 mm vane spacing and inlet velocity of 2.5 and 3.0 m / s respectively, the salt mist separation characteristics of gas turbine inertial guide vanes were studied. First of all, the experimental data of the inertial-stage guide vane separation characteristics were obtained, and then the main mechanism of the separation of salt in the device flow channel and the factors that affected the separation characteristics were analyzed qualitatively by discrete phase numerical simulation. The experimental results and numerical simulations show that the separation efficiency of the inertial-stage separation unit is about 97%, the maximum value is 98.71% and the minimum value is 95.90%, which is close to the complete separation effect. The separation efficiency increases with the increase of guide vane spacing. Separation efficiency will increase with the initial import rate increase.