Evaluation of Water Droplets Re-entrainment through Gas Turbine Intake Air Filters Using Global Sizing Velocimetry (GSV) Method

摘要

1. GSV method was successfully applied to evaluate the performance of three different air inlet filters for the water droplet re-entrainment. 2. As the filters are saturated, pressure drop builds up causing increase in water penetration and re-entrainment. 2.1 Non-hydrophobic filters release significant amount of water droplets compare to hydrophobic filters. 2.2 Re-entrained droplets were 8 to 17 μm. These can bring dirt and soluble salts into the gas turbine and cause fouling of compressor quickly. Large re-entrained droplets (20-200 μm) were detected which can carry more dirt and soluble salts. 3. GSV is a realtime, sensitive tool to characterize emission of both small (8-17(μm) and large (20-200 μm) water droplets from filters.