Experimental Studies on Flow/Flame and Flame/Flame Interactions

这项研究的目的是通过实验模拟湍流燃烧中遇到的火焰-流动相互作用，其中仔细控制的旋转层流火焰经历不同程度的拉伸。由于相对射流和滞止点流动的可达性和二维性，因此选择了相反的射流和驻点流动。将在反应和未反应环境中测量温度、浓度和速度，并将探索由旋转引起的二次流的结构以及先前发现的共振现象。支持实验将在利弗莫尔的桑迪亚国家实验室的燃烧研究设施中进行。在实际应用的装置中，燃烧总是涉及到几何形状中的湍流，而不能对重要的标尺和速度场进行时间测量。系统性能的数值预测需要了解局部湍流结构内发生的火焰熄灭和传播过程。通过拟议的简单实验成功地模拟这一复杂现象将大大有助于我们的理解。

The objective of the research is to experimentally simulate the flame- flow interactions encountered in turbulent combustion with a carefully controlled, rotating laminar flame undergoing various degrees of stretch. Opposed jet and stagnation point flows have been chosen because of their accessibility and two-dimensionality. Temperature, concentration, and velocity will be measured in reacting and unreacting environments, and the structure of secondary flows induced by rotation as well as resonance phenomena previously identified will be explored. Supporting experiments will be performed at the Combustion Research Facility of the Sandia National Laboratory, Livermore. Combustion in devices of practical application invariably involves turbulent flow in geometries not amenable to temporal measurement of the important scaler and velocity fields. Numerical predictions of the system performance require an understanding of the flame quenching and propagation processes that occur within the localized turbulent structures. Successful simulation of this complex phenomena through the proposed simple experiments will substantially contribute to our understanding.