High-Speed Irregular Particle Flow Diagnostic System

所要求的系统“高速不规则颗粒流动诊断系统”将能够确定不规则形状颗粒在湍流中的完整的三维行为。对流动中颗粒动力学的了解对于成功设计和确定众多工业应用的最佳操作条件非常重要，例如气力输送、旋风分离器、流态化床、除尘器和煤粉燃烧器等等。到目前为止，大多数关于气粒流动的研究都假定颗粒是完美的球体。这种假设非常方便，但在大多数情况下是不现实的。预测一般非球形粒子的运动是一项不平凡的任务，非球形粒子离散的时间和强烈的非线性性质以及与流体相相互作用的复杂性质加剧了这一任务。因此，关于非球形粒子行为的理论研究很少。申请人(B.范·瓦赫姆教授)开创了在复杂和现实情况下不规则形状颗粒行为的研究工作。目前还没有关于流动中非球形颗粒的三维行为的实验研究。所要求的系统将是此类系统中的第一个，将用于：a)验证理论框架，b)对不规则形状颗粒在流体流动中的行为获得新的见解，以及c)研究其他多相系统，如下降的液膜。该系统将成为马格德堡OvGU一个装备精良的现代化实验室的一部分。

The requested system „High­Speed Irregular Particle Flow Diagnostics System“ will enable to determine the complete, three­dimensional behaviour of irregularly shaped particles in turbulent flows. Knowledge of the dynamics of particles in flows has a great importance for the successful design and determining the optimum operating conditions of numerous industrial applications, e.g. pneumatic transport, cyclone separators, fluidised beds, dust collectors, and pulverised­coal combustors to name a few. So far, the majority of studies involving gas­particle flows assume that particles are perfect spheres. This assumption is very convenient, but in most cases unrealistic. Predicting the motion of general non­spherical particles is a non-trivial task that is exacerbated by the discrete temporal and strongly non-linear nature of non­spherical particles and the complex nature of the interaction with the fluid phase. Hence, there are a very few theoretical studies on the behaviour of non­spherical particles. The applicant (Prof. B. van Wachem) has pioneered research work on the behaviour of irregularly shaped particles in complex and realistic situations. There are currently no experimental studies elucidating the three­dimensional behaviour of non­spherical particles in flows. The requested system will be the first in its kind and will be used to: a) validate the theoretical frameworks, b) gain new insights in the behaviour of irregularly shaped particles in fluid flow, and c) study other multiphase systems, such as falling liquid films. The system will be part of a highly equipped and modern laboratory at OVGU in Magdeburg.