A Combined Computational and Experimental Investigation of Swirling Jets

摘要 提案编号：CTS-9523291 PI：Maxworthy 这是一个全面的和仔细集成的计算和实验研究的旋转射流的演变。 这些流动在广泛的应用中具有实际意义。 尽管这一实际意义，这些流量的时空动态管理机制知之甚少。 旋转射流受到剪切和离心不稳定性，因此表现出丰富多样的扰动模式。 这些机制的产生、存在和相互作用尚未得到详细研究。 预计通过涡动力学和直接Navier-Stokes模拟以及实验DPIV测量来识别、量化和最终控制支配结构将显著推进各种推进、燃烧和混合应用中的最新技术水平。

ABSTRACT Proposal Number: CTS-9523291 PI: Maxworthy This is a comprehensive and carefully integrated computational and experimental investigation of the evolution of swirling jets. These flows are of practical significance in a broad range of applications. In spite of this practical significance, the mechanisms that govern their spatio-temporal dynamics of these flows are poorly understood. Swirling jets are subjected to both shear and centrifugal instabilities and therefore exhibit a rich and varied set of disturbance modes. The generation, existence, and interaction of these mechanisms has not been investigated in any detail. It is expected that the identification, quantification, and eventual control of the governing structures by means of vortex dynamics and direct Navier-Stokes simulations, as well as experimental DPIV measurements will significantly advance the state of the art in a variety of propulsion, combustion and mixing applications.