GEOMETRIC SENSITIVITY OF THREE-DIMENSIONAL SEPARATED FLOWS

三维分离流的几何敏感性

• 批准号: 8169841
• 负责人: Erica Cherry
• 金额: $ 1.85万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8169841
• 关键词: Air; Computer Retrieval of Information on Scientific Projects Database; Coupled; Data; Data Set; Funding; Grant; Institution; Location; Modeling; Pump; Research; Research Personnel; Resources; Source; System; United States National Institutes of Health; design; pressure; programs; research study; simulation

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Flows including strong adverse pressure gradient and boundary layer separation from a smooth wall (as opposed to separation fixed at a geometric discontinuity) are among the most challenging high-Reynolds number flows to model. Accurate prediction of the separation point puts great demands on turbulence models, and small errors in separation location can produce large errors in the overall velocity and pressure distribution. The end result is that CFD has not yet made significant inroads into the design of systems like highly loaded pumps and air/hydrofoils operating at far-off-design conditions. The objective of this research is to provide a detailed data set for a three-dimensional, closed separation bubble formed on a smooth wall in a geometrically-simple diffuser geometry. In addition, the experimental program is coupled to a modeling effort. By doing the experiments and simulations in parallel, we can assure that the most detailed data are supplied in the flow regions causing the most difficulties for simulations.

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 包括强逆压梯度和光滑壁面边界层分离的流动（与 固定在几何不连续处的分离）是对模型最具挑战性的高雷诺数流动之一。 分离点的准确预报对湍流模型提出了很高的要求， 位置可能在总速度和压力分布中产生大的误差。 最终的结果是，CFD还没有 在高负荷泵和远距离运行的空气/水翼等系统的设计方面取得了重大进展 条件本研究的目的是提供一个详细的数据集的三维，封闭的分离气泡 以几何简单的扩散器几何形状形成在光滑壁上。 此外，该实验方案还与 做模特的努力 通过并行进行实验和模拟，我们可以确保最详细的数据是 在流动区域中供应，导致模拟的最大困难。