Dynamic impact behavior during bubble collapsing
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摘要: 在電脈沖空蝕實驗裝置上,設計加裝了壓電傳感系統,成功地監測記錄了空泡潰滅對金屬表面的作用力,對氣泡的潰滅過程進行了描述和解釋,驗證了氣泡的二次潰滅理論.計算了兩次潰滅過程中沖擊能量變化情況.測量了氣泡在距離金屬表面不同距離時,空泡潰滅作用于金屬表面壓強和沖量的大小,兩者的變化規律對比分析表明:脈沖放電產生的沖擊壓和沖量隨距金屬表面的不同距離而表現出的規律不一致.Abstract: A new designed piezoelectricity sensor system was equipped to detect the impact pressure of collapsing cavitation bubbles induced by a spark-generated system for understanding the dynamic of collapsing bubbles on metal surface. The bubble collapsing process was described and analyzed, and the second bubble collapse theory was verified. The dynamic energy of the two stages of bubble collapse was given. More important, the impact pressure and the impulse were determined and calculated at different distances between the collapsing bubble and the metal surface, and the two characteristics were compared.
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Key words:
- cavitation /
- bubble collapse /
- material damage /
- piezoelectric sense /
- cavitation erosion mechanism
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