SGER: Interaction between Near-Wall Turbulent Flows and Compliant Surfaces with Shear-Stress Coupling

建议没有。本文将采用分析和直接数值模拟的方法研究壁面湍流与复杂柔面之间的相互作用。这种相互作用是否可能的问题是一个长期存在且尚未解决的问题。其中一个主要目标是设计出能够最大限度地减少湍流声音产生和湍流阻力的柔性壁。主要目标之一是提高对在这种情况下起作用的动力机制的理解。最终，这种理解将被用于操纵湍流，使其某些特性以理想的方式改变。这样做的目的是为了减少这种边界层产生的湍流阻力，同时也为了减弱湍流产生的噪声。如果所提出的柔顺壁面设计能够成功地减少湍流阻力，这些发现将促进经济上有吸引力的方法，以提高大量技术系统的效率。最有希望的候选者将是依赖或受稠密流体湍流影响的设备，如水、石油或其他液体。船舶和潜艇有可能大幅减少阻力，也有可能减少管道的压力损失。此外，研究生将接受湍流研究和湍流数值模拟领域的培训，并能够将在此过程中获得的知识应用于各种技术应用。

PROPOSAL NO.: CTS-0330320PRINCIPAL INVESTIGATORS: DIETMAR REMPFERINSTITUTION: ILLINOIS INSTITUTE OF TECHNOLOGY INTERACTION BETWEEN NEAR-WALL TURBULENT FLOWS AND COMPLIANT SURFACES WITH SHEAR-STRESS COUPLINGResearch will be conducted concerning the interaction between wall-generated turbulence and complex compliant surfaces using analysis and direct numerical simulation. The question of whether such interactions are possible is a long-standing and as of yet unresolved issue. One of the main goals is to achieve the ability to design compliant walls that can optimally reduce turbulent sound production and turbulent drag. One of the main objectives is an improved understanding of the dynamical mechanisms at work in such a situation. Ultimately, this understanding then will be used to manipulate the turbulent flow such that some of its characteristics are altered in a desirable way. The goals are to reduce the turbulent drag generated by such boundary layers, and also to attenuate the noise that is generated by the turbulent flow.If the design of a compliant wall as proposed can successfully reduce turbulent drag, these findings will facilitate economically attractive methods for improving the efficiency of a large number of technical systems. The most promising candidates would be devices that depend on or are affected by turbulent flow of dense fluids, like water, petroleum, or other liquids. It could be possible to achieve substantial drag reduction for ships and submarines, and it may also be possible to reduce pressure losses in pipelines. In addition, a graduate student will be trained in the field of turbulent research and numerical simulation of turbulent flows, and who will be able to apply the knowledge gained in the process to a wide variety of applications in technology.