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将水喷入燃气轮机压气机的进口正变成燃气轮机出力增加的标准技术。喷水湿化进气至95%的相对温度,并冷却进气接近湿泡温度是一种传统的进口喷雾技术的应用。而强化喷雾则是将相当于进气质量流量的2%的水喷入压气机的进口。这种技术允许微水滴进入压气机,对某一设计运行点形成压气机运行的不同条件。该技术正在发展,使燃气轮机总体性能最优化。取决于大气条件(温度与湿度),喷雾技术能使出力增加5-10%。当采用强化喷雾装置时的一般目标是每喷入1%的水,增加出力5%。本文将报告用于喷雾和强化喷雾装置中的旋流压力喷嘴的下游雾化特性的度验研究成果。成果来自于实验室和一个缩小的重型燃气轮机进气装置的多次试验研究。通过改变以下参数:喷嘴孔板下游距离以及大气温度和相对湿度,雾羽范围内的水滴尺寸和水的质量通量。喷嘴特性的主要依据是雾羽内的水滴颗粒度分布。水滴粒度分布要求在20～30μm范围之内。因为对于进口喷雾技术,由于过滤器室和压气机入口之间的滞留时间很短,水滴必须能迅速蒸发。对于强化喷雾技术,微水滴必须能追随气流进入压气机,以减轻它们对压气机叶片的影响及产生侵蚀的危险,而要如此,前提是水滴粒径是足够的小。水滴粒度分布通过采用以激光衍射和成像为基础的喷雾诊断技术,在类似于燃气
The import of water into gas turbine compressors is becoming the standard technology for increased gas turbine output. Spray humidification of the intake air to 95% relative humidity, and cooling the intake air close to the wet bulb temperature is a classical application of imported spray technology. The enhanced spray is the equivalent of 2% of the inlet mass flow of water into the compressor inlet. This technique allows water droplets to enter the compressor, creating a different point of operation for the compressor at a given design point of operation. The technology is evolving to optimize the overall performance of gas turbines. Depending on the atmospheric conditions (temperature and humidity), spray technology can increase the output by 5-10%. The general goal when using the enhanced spray unit is to increase the output by 5% for each 1% injection of water. This paper reports on the results of an empirical study of the downstream atomization characteristics of swirling pressure nozzles used in spray and enhanced spray applications. The results came from several pilot studies of laboratories and a smaller heavy gas turbine intake. By changing the following parameters: the distance downstream of the nozzle orifice and the atmospheric temperature and relative humidity, the droplet size in the haze range and the mass flux of water. The main basis for nozzle characteristics is the particle size distribution of water droplets within the fog. Droplet size distribution requirements in the 20 ~ 30μm range. Because for inlet spray technology, water droplets must evaporate quickly due to the short residence time between the filter chamber and the compressor inlet. For enhanced spray technology, water droplets must be able to follow the air flow into the compressor to reduce their effect on the compressor blades and the risk of erosion, provided that the droplet size is small enough. Droplet size distribution Through the use of laser diffraction and imaging-based spray diagnostic technology, similar to the gas