New On Line Washing Technique for Prevention of Performance Deterioration due to Fouling on Steam Turbine Blades (2nd Report, Basic Experiment and Analysis for Actual Operation of Washing System)

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  • HATA Satoshi
    Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
  • HIRANO Tatsuya
    三菱重工業 (株) 広島研究所機械プラント研究推進室
  • WAKAI Tokiya
    三菱重工業 (株) 広島研究所機械プラント研究推進室
  • TSUKAMOTO Hiroshi
    Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology

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Other Title
  • 蒸気タービン翼素への不純物付着による性能低下と新洗浄方法（第２報，新洗浄方法）
  • ジョウキ タービンヨクソ エ ノ フジュンブツ フチャク ニ ヨル セイノウ テイカ ト シン センジョウ ホウホウ ダイ2ホウ シン センジョウ ホウホウ
  • 2nd Report, Basic Experiment and Analysis for Actual Operation of Washing System
  • 第2報, 新洗浄方法

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Abstract

Mechanical-drive steam turbines have the heavy deposition of fouling materials on blade and nozzle path surfaces due to contamination. As a result, turbine performance tends to be deteriorated gradually. The first paper introduced this fouling phenomena and actual conventional washing procedure in order to prevent the fouling problem and its practical disadvantage. In this second report, regarding new washing method to resolve above disadvantage, the results of detail analysis for erosion damage, thermal stress evaluation of internal parts due to injected water and heat balance of steam/water mixture are introduced in comparing online washing test results.

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