东北大学学报(自然科学版) ›› 2023, Vol. 44 ›› Issue (11): 1584-1590.DOI: 10.12068/j.issn.1005-3026.2023.11.010

• 材料与冶金 • 上一篇    下一篇

25%K2O-30%Na2O-45%SiO2熔渣中超声空化行为的数值模拟

焦石岩1,2, 廖相巍3, 闵义1,2,3, 刘承军1,2   

  1. (1. 东北大学 多金属共生矿生态化冶金教育部重点实验室, 辽宁 沈阳110819; 2. 东北大学 冶金学院, 辽宁 沈阳110819; 3. 海洋装备用金属材料及其应用国家重点实验室, 辽宁 鞍山114021)
  • 发布日期:2023-12-05
  • 通讯作者: 焦石岩
  • 作者简介:焦石岩(1997- ),男,河北石家庄人,东北大学博士研究生; 闵义(1972- ),男,辽宁海城人,东北大学教授,博士生导师; 刘承军(1974- ),男,河南获嘉人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51974075); 海洋装备用金属材料及其应用国家重点实验室开放基金资助项目(SKLMEA-K202001).

Numerical Simulation of Ultrasonic Cavitation Behavior in 25%K2O-30%Na2O-45%SiO2 Slag

JIAO Shi-yan1,2, LIAO Xiang-wei3, MIN Yi1,2,3, LIU Cheng-jun1,2   

  1. 1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral
  • Published:2023-12-05
  • Contact: MIN Yi
  • About author:-
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摘要: 为了明晰熔渣体系中超声的空化行为,应用Rayleigh-Plesset方程模拟1020℃条件下25%K2O-30%Na2O-45%SiO2熔渣中空化泡的运动行为.结果表明,在空化核尺寸15μm,声压振幅3.039MPa的条件下,空化泡在频率25kHz由一次振荡溃灭变为多次振荡才溃灭的瞬态空化,36kHz变为无周期稳态空化,63kHz变成周期稳态空化,呈现振幅降低和溃灭时间变长的特点.在空化核尺寸15μm,频率20kHz 的条件下,空化泡在声压2.4MPa处由稳态空化变为一次振荡溃灭的瞬态空化,17MPa处变为2次振荡溃灭的瞬态空化, 170MPa处变为多次振荡才溃灭的瞬态空化,呈现振幅增大和溃灭时间变长的特点.在声压振幅3.039MPa,频率20kHz的条件下,空化泡在空化核2μm由稳态空化变为一次振荡溃灭空化,21μm 变为多次振荡才溃灭的空化,33μm变为非周期稳态空化,呈现振幅降低和溃灭时间变长的特点.

关键词: 熔渣;超声;空化;数值模拟

Abstract: To clarify the cavitation behavior of ultrasonic in the slag system, the Rayleigh-Plesset equation was applied to simulate the motion behavior of cavitation bubbles in the 25% K2O-30% Na2O-45% SiO2 slag at 1020℃. The results show that at the cavitation nucleus of 15μm and the sound pressure of 3.039MPa, the cavitation bubbles change from one oscillation collapse to transient cavitation with multiple oscillations before collapse at 25kHz, to acyclic steady-state cavitation at 36kHz, and to periodic steady-state cavitation at 63kHz, showing an overall decrease in vibration amplitude and increase in collapse time. At cavitation nucleus of 15μm and frequency of 20kHz, the cavitation bubble changes from steady-state cavitation to one-oscillation collapse transient cavitation at 2.4MPa, to two-oscillation collapse transient cavitation at 17MPa, and to multi-oscillation collapse transient cavitation at 170MPa, showing an overall increase in vibration amplitude and collapse time. At sound pressure of 3.039MPa and frequency of 20kHz, the cavitation bubble changed from periodic steady-state cavitation to one-oscillation collapse transient cavitation at 2μm, then to multi-oscillation collapse transient cavitation at 21μm, and finally to acyclic steady-state cavitation at 33μm, showing an overall decrease in vibration amplitude and an increase in collapse time.

Key words: metallurgical slag; ultrasound; cavitation; numerical simulation

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