Planar Interferometric Tracking of droplets in evaporating conditions
Planar Interferometric Tracking of droplets in evaporating conditions
复制标题
蒸发条件下液滴的平面干涉跟踪
DOI：
10.1007/s00348-022-03507-5
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发表时间：
2022
影响因子：
2.4
通讯作者：
Davies H
中科院分区：
文献类型：
--
作者：
Davies H
提出了一种有效的拉格朗日平面干涉跟踪(PIT)处理器，用于跟踪由超声波雾化器在蒸发条件下产生的多个液滴的大小和路径，喷雾液滴的直径(20-150微米)和体积浓度(300滴/厘米)与工业应用一致。开发了一种测试设备，其中液滴暴露在同轴气流中的温度梯度中，其中外部气流被预热到所需的温度(288-550K)。PIT方法建立在TSI Global Size Velocimtery测量技术的基础上，允许检测、调整液滴的大小并跟踪液滴的路径，否则这些液滴会被商业软件丢弃或错误分析。该方法首先在非蒸发条件下进行了测试，确定了多种误差来源，其中一些是最常见的平面干涉技术，并评估了它们的量级和对最终液滴测量的影响。误差的主要来源与液滴的平面外运动和它们在测量体积上花费的时间有关。对于非蒸发条件，可以对测量数据进行处理，以滤除这种误差源。在蒸发条件下，定义了一种新的方法来评估测量误差对液滴蒸发和测量时间的影响。坑法可以跟踪加热到495K的气流中携带的单个甲醇液滴，并确定它们在蒸发条件下的尺寸减小。然后将测量的液滴蒸发率与迭代蒸发模型的预测值进行比较，发现模型预测值和实测值之间有很好的一致性。
An effective Lagrangian Planar Interferometric Tracking (PIT) processor is proposed to track the size and path of multiple droplets, with spray droplet diameters (20–150 µm) and volumetric concentrations (300 drops/cm) consistent with industrial applications, produced by an ultrasonic atomiser in evaporating conditions. A test facility was developed where liquid droplets are exposed to a temperature gradient in a co-axial air flow, where the outer stream is preheated to the desired temperature (288–550 K). The PIT method builds on a TSI Global Sizing Velocimtery measurement technique and allows to detect, size and follow the path of droplets which were otherwise discarded or mis-analysed by the commercial software. The methodology was first tested under non-evaporating conditions, and multiple sources of errors, some common to most planar interferometric techniques, were identified and their order of magnitude and impact on final droplet measurement assessed. The main source of error is related to the out-of-plane motion of the droplets and the time they spend in the measurement volume. For non-evaporating conditions, measured data can be processed to filter out this source of error. In evaporating conditions, a novel method for assessing the impact of measurement error with respect to droplet evaporation and measurement timescales is defined. The PIT method allowed tracking of individual methanol droplets entrained within an airflow heated to 495 K and determining their size reduction under evaporating conditions. Measured droplet evaporation rates were then compared against those predicted by an iterative evaporation model, and a very good agreement was found between the modelled and measured estimates.Graphical abstract
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影响因子：
2.4
作者：
N. Damaschke;H. Nobach;T. Nonn;Nikolay Semidetnov;C. Tropea
通讯作者：
N. Damaschke;H. Nobach;T. Nonn;Nikolay Semidetnov;C. Tropea
影响因子：
1.9
作者：
Z. Falgout;Yi Chen;D. Guildenbecher
通讯作者：
Z. Falgout;Yi Chen;D. Guildenbecher
影响因子：
3.7
作者：
Yarin, AL;Brenn, G;Tropea, C
通讯作者：
Tropea, C
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
A. Arce;A. Blanco;A. Soto;Isabel Vidal
通讯作者：
Isabel Vidal
DOI：
--
发表时间：
1970
期刊：
影响因子：
--
作者：
E. Stromsoe;H. Ronne;A. Lydersen
通讯作者：
A. Lydersen