燃气轮机进气口盐雾粒子分布的粒子多谱勒分析

PDA Measurement on the Particle Distribution of the Inlet Facilities of Gas Turbine

为了降低燃气轮机进气分离装置的阻力和提高分离效率,用粒子多谱勒分析仪器(PDA)对燃气轮机进气分离装置前端进气口的流场分布和粒径分布等进行了测量,测量结果可以为进气分离装置的组合提供依据。试验中用等速采样和钠离子分析仪器测量分离效率,同时用PDA测量进气口设备的前端和后端的粒子分布情况,结果发现进气口部分粒子的分布和分离效率大于99%,这说明分离器对0～0.1mm的粒子分离效率很高。采用几种组合的进气装置分离盐雾粒子,结果进气设备后端测量不到粒子,考虑到小的粒子容易被噪声信号所覆盖,由此判断经过分离后即使还有盐雾粒子粒径也很小。

Field filming effectiveness and the particle distribution of the inlet facilities of gas turbine has been investigated with PDA, so as to provide information for the organization of different inlet facilities, with the purpose of reducing resistance while increasing the separating effectiveness at the same time. In the experiment, the isokinetic sampling and the sodium ion densimeter were used for the efficiency measurement of the inlet facilities and PDA was adopt for the distribution of particles before and after the inlet facilities. From the results of the experiment, the efficiency can be above 99%, and the distribution of particles before the facilities can be seen. However, after being separated, the particles cannot be filmed with PDA, which means the particles are very small and the noise covers the particle signals, proving that the efficiency of the facilities is very high.