In acoustic droplet vaporization (ADV), a cavitated bubble grows and collapses depending on the pressure amplitude of the acoustic pulse. During the bubble collapse, the surrounding liquid is compressed to high pressure, and liquid compressibility can have a significant impact on bubble behavior and ADV threshold. In this work, a one-dimensional numerical model considering liquid compressibility is presented for ADV of a volatile microdroplet, extending our previous Rayleigh-Plesset based model [Ultrason. Chem. 71 (2021) 105361]. The numerical results for bubble motion and liquid energy change in ADV show that the liquid compressibility highly inhibits bubble growth during bubble collapse and rebound, especially under high acoustic frequency conditions. The liquid compressibility effect on the ADV threshold is quantified with varying acoustic frequencies and amplitudes.

在声学液滴汽化 (ADV) 中，空化气泡根据声脉冲的压力幅度生长和破裂。在气泡破裂过程中，周围的液体被压缩到高压，液体可压缩性会对气泡行为和 ADV 阈值产生重大影响。在这项工作中，针对挥发性微滴的 ADV 提出了考虑液体压缩性的一维数值模型，扩展了我们之前基于瑞利-普莱塞特的模型 [Ultrason. 化学 71 (2021) 105361]。ADV 中气泡运动和液体能量变化的数值结果表明，液体可压缩性在气泡坍塌和回弹过程中高度抑制了气泡的生长，尤其是在高声频条件下。