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水力タービン材料の損傷に対するカビテーション侵食距離の影響
Pengbo Wu1, Pengcheng Guo1, Shuaihui Sun1
1State Key Laboratory of Water Engineering Ecology and Environment in Arid Area, Xi'an University of Technology, Xi' an 710048 Shaanxi, China.
Ultrasonics sonochemistry
|September 3, 2025
まとめ
カビテーション侵食距離は,水力機械に大きく影響する. 特にQ355B,45#,06Cr16Ni5Moの最適な材料耐性は,1mmの穴の侵食距離で観察され,明確な損傷メカニズムが明らかになりました.
科学分野:
- 材料科学
- 流体力学
- 機械工学
背景:
- カビテーションの侵食は,水力機械の材料の損失と構造的な損傷を引き起こす.
- この劣化は,機器の動作と効率に影響します.
研究 の 目的:
- カビテーションフィールド内のギャップのためのカビテーション侵食距離モデルを確立する.
- 不鋼 (06Cr16Ni5Mo),炭素鋼 (45#),およびQ355Bの材料損傷に対するカビテーション侵食距離の影響を調査する.
主な方法:
- 高速カメラを用いて,様々な穴の浸食距離での泡の分布を記録した.
- 画像解析でカビテーションの強度分布を分析した.
- 損傷の進行と故障のメカニズムを明らかにするために,包括的な金属学分析を行った.
主要な成果:
- すべての試験材料の最大空洞化強度と累積体重減少は,空洞化侵食距離1mmで発生した.
- Q355B,45#,06Cr16Ni5Mo 体重減少順番は最高から最低まで
- 06Cr16Ni5Moはプラスチックの変形を示し,45#とQ355Bは脆い分裂を示した.
結論:
- カビテーション侵食距離は,水力機械の材料損傷に影響を与える重要な要因です.
- この距離に依存する効果と故障メカニズムの理解は,水力タービンの材料の空洞化抵抗を改善するのに役立ちます.
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