Experiment on internal cooling effect of water spraying within compressor of S1A-02 gas turbine plant is carried out. The experimental results are represented in this paper. The water spraying particle diameter and distribution are measured by Laser Beam Diffraction Method. In addition, the relationship of evaporative time of water particle with its diameter and relative humidity are discussed. The design and mechanism of compressed air blowing type water sprayer nozzle are also analyzed in this paper.

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