Collaborative Research: Fundamental Investigation of Turbulent Ablation

合作研究：湍流消融的基础研究

• 批准号: 0967224
• 负责人: Christopher White
• 金额: $ 19.51万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-15 至 2014-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0967224&HistoricalAwards=false
• 关键词: Collaborative; Research; Fundamental; Investigation; Turbulent

0967224WhiteThis research will aid development of the fundamental understanding necessary to determine how a turbulent flow interacts with an eroding or ablating surface. Specifically, the coherent structures within a turbulent boundary layer, for example, trigger and drive the growth of non-uniform surface topography. In turn, the evolving topography influences the coherent structures within the turbulent flow. The coupling between the flow and solid structures can exist under either isothermal or non-isothermal conditions involving heat transfer. Intellectual Merit: The research team includes investigators at the University of Vermont and the University of New Hampshire. The computational component of the research is aimed at developing a generalized algorithm to simulate the spatially-varying ablation of an initially-smooth surface under heated conditions. Corresponding experimentation will involve acquisition of detailed data to validate the computational model. The model will be based upon the direct numerical simulation methodology which is capable of predicting the fine detail of the flow field as well as the potentially complex surface shape evolution. Correspondingly, the experimental program will utilize, for example, particle image velocimetry to measure the detail of the flow structure, as well as optical methods to capture the surface shape evolution. Both isothermal and non-isothermal conditions will be considered.Broader Impacts: The coupled dynamics of turbulent flow and surface erosion or ablation is important in applications ranging from high speed flight to latent energy storage. Additional applications include erosion and movement of sand or soil around bridge pilings, and beach erosion. The research will involve a diverse cadre of undergraduate students while a special topics graduate course will address the integration of experiment and computation.

0967224 WHITESHIS研究将有助于开发确定湍流如何与侵蚀或消融表面相互作用所必需的基本理解。具体而言，例如，湍流边界层内的相干结构，例如触发并驱动不均匀的表面形貌的生长。反过来，不断发展的地形会影响湍流中的相干结构。在涉及传热的等温或非等热条件下，流量和固体之间的耦合可以存在。知识分子优点：研究团队包括佛蒙特大学和新罕布什尔大学的研究人员。研究的计算成分旨在开发一种广义算法，以模拟在加热条件下最初平滑表面的空间变化消融。相应的实验将涉及获取详细数据以验证计算模型。该模型将基于直接的数值模拟方法，该方法能够预测流场的细节以及潜在的复杂表面形状演化。相应地，实验程序将利用例如粒子图像速度法来测量流动结构的细节，以及捕获表面形状演化的光学方法。将考虑等温条件和非等温条件。Boader的影响：湍流和表面侵蚀或消融的耦合动力学在从高速飞行到潜在的储能储存范围内至关重要。其他应用包括桥梁桩周围的沙子或土壤的侵蚀和运动以及海滩侵蚀。这项研究将涉及多样化的本科生干部，而专门的研究生课程将解决实验和计算的整合。