Abstract Experimental measurements of bulk droplet evaporation within a shock-driven multiphase instability, or SDMI, were studied using advanced imaging diagnostics. Specifically, droplet evaporation was quantified by determining the rate of acetone vapor produced from liquid acetone droplets. The extent of the acetone vapor produced was measured using quantitative planar laser-induced fluorescence (Q-PLIF). In addition to vapor concentration, Q-PLIF also accounts for the effects of pressure and temperature on the fluoresced acetone. Concurrently performed with Q-PLIF were particle image velocimetry (PIV) measurements as the means to gather data on the acetone droplet’s velocities as well as the particle fields morphology throughout its development. By using these two diagnostic techniques, two successive data points of the acetone droplets evaporation rate throughout the development of the SDMI were obtained. Although these first two data sets were not adequate to fully prescribe an accurate evaporation rate model, they were a sufficient corrigendum to the commonly-utilized D-squared evaporation law. Overall, the previous techniques have been demonstrated that acetone droplet evaporation can be measured quantitatively, enabling prediction of evaporation enhancement due to the strong hydrodynamic mixing within the SDMI.

中文翻译：

---

一种在冲击驱动的多相不稳定性中测量液滴蒸发的方法

摘要 使用先进的成像诊断方法研究了冲击驱动的多相不稳定性或 SDMI 中大量液滴蒸发的实验测量。具体而言，通过确定从液态丙酮液滴产生的丙酮蒸气的速率来量化液滴蒸发。使用定量平面激光诱导荧光 (Q-PLIF) 测量产生的丙酮蒸汽的程度。除了蒸汽浓度之外，Q-PLIF 还考虑了压力和温度对发出荧光的丙酮的影响。与 Q-PLIF 同时进行的是粒子图像测速 (PIV) 测量，作为收集丙酮液滴速度以及整个发展过程中粒子场形态数据的手段。通过使用这两种诊断技术，获得了在 SDMI 开发过程中丙酮液滴蒸发率的两个连续数据点。尽管这前两个数据集不足以完全规定准确的蒸发率模型，但它们足以纠正常用的 D 平方蒸发定律。总体而言，先前的技术已经证明可以定量测量丙酮液滴蒸发，从而能够预测由于 SDMI 内的强流体动力混合而导致的蒸发增强。