SGER: Feasibility Study of a Molecular Based Approach for the Plannar Mapping of the Pressure Field within Flows

项目编号：CTS-0649744项目调查员：M.KOOCHESFAHANIINSTUTION：密歇根州立大学这是一个探索性的研究项目，旨在开发一种基于分子的方法来绘制气体流动中的压力场的平面全场图。该方法建立在使用磷光分子示踪剂的分子标记测速(MTV)背后的概念上。在MTV应用中，我们没有避免氧的有害猝灭效应，而是利用它来确定氧浓度，从而确定含氧气流中的局部压力。被称为分子标记测压(MTM)的压力测量方法的工作原理与压敏涂料(PSP)的工作原理非常相似，即被氧猝灭的磷光。在PSP中，磷光分子(即发光体)被嵌入到涂在目标表面上的涂层中。然而，在MTM中，浮光体预混合在流体本身中，其被氧气淬灭导致一个程序来绘制流动中的压力场。建立了该方法的基本理论框架。然而，该方法的基本实验并发症和局限性是完全未知的，也很难预测。因此，勘探工作有一定的风险。如果这一项目取得成功，它对该领域潜在的更广泛影响可能是巨大的。它将提供一种捕捉流动体内全场压力分布的方法，这一能力到目前为止仍然难以捉摸。

ABSTRACTPROPOSAL NO.: CTS-0649744PRINCIPAL INVESTIGATORS: M. KOOCHESFAHANIINSTITUTION: MICHIGAN STATE UNIVERSITYThis is an exploratory research project aimed at development of a molecular-based approach for planar, whole-field mapping of the pressure field in gas flows. The method is built on concepts behind Molecular Tagging Velocimetry (MTV) using phosphorescent molecular tracers. Instead of avoiding the detrimental quenching effects of oxygen in MTV applications, we take advantage of it in order to determine the oxygen concentration and, therefore, the local pressure in oxygen-containing gas flows. The working principle of the proposed pressure measurement approach, referred to as Molecular Tagging Manometry (MTM), is quite similar to that of pressure sensitive paints (PSP), i.e. the quenching of phosphorescence by oxygen. In PSP, the phosphorescent molecule (i.e. lumophore) is embedded in a coating that is painted on the surface of interest. In MTM, however, the lumophore is premixed in the fluid itself and its quenching by oxygen leads to a procedure to map the pressure field in the flow. The basic theoretical framework for the method is developed. However, the essential experimental complications and limitations of the approach are completely unknown and difficult to predict. As such, the exploratory work is somewhat risky. Should this project meet with success, its potential broader impact on the field can be significant. It will offer a methodology for capturing the whole-field pressure distribution within the body of a flow, a capability that has so far remained elusive.