CAREER: Bridging Geometric Design and Aerodynamic Simulation of Turbomachinery: An Integrative Design-Through-Analysis Framework Enabled by Embedded Domain Methods

职业：桥接涡轮机械的几何设计和空气动力仿真：嵌入式域方法支持的集成设计分析框架

• 批准号: 1651577
• 负责人: Dominik Schillinger
• 金额: $ 50万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-02-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651577&HistoricalAwards=false
• 关键词: CAREER; Bridging; Geometric; Design; Aerodynamic

The transfer from computer-aided geometric design to physics-based computer simulation requires geometry processing and mesh generation procedures, which often constitute significant barriers to creating rapid design-through-analysis workflows. The objective of this project within the Faculty Early Career Development (CAREER) Program is to remove these barriers by developing new computational methodologies that enable seamless integration and automation. Turbomachinery is a key enabling energy technology, e.g., for electricity production and air transport. The new design-through-analysis methodologies envisioned in this project aims to fundamentally facilitate simulation-based turbomachinery design and optimization. These can lead to critical improvements in design procedures that serve the national interest, promote national prosperity, and enable unconventional turbomachinery designs that improve sustainability and energy efficiency. The project results also promote the progress of computational science, in particular by contributing significant methodological advances to the current drive towards unsteady full-wheel simulations. The project includes an education component that combines a new summer camp with research internship opportunities for high school and undergraduate students. It provides opportunities for energizing K-12 and undergraduate experiences that motivate participants to join advanced degree programs in engineering, with particular emphasis on minorities and underrepresented groups. This will directly strengthen the infrastructure for STEM outreach at the University of Minnesota and contribute to developing and maintaining a well-trained STEM workforce, which is important for the future competitiveness of related industries in the United States.The research approach revolves around the idea of combining parametric geometry modeling with new embedded domain finite element methods for integrated computational aerodynamics. While parametric modeling techniques are available in commercial design tools, embedded domain methods remain plagued by serious technology gaps that prevent their application for high-fidelity aerodynamics. Examples include the detrimental impact of elements with small cuts on conditioning and time step size, low-order accuracy of quadrature rules in cut elements, and algorithms that are unsuitable for emerging heterogeneous computing architectures. The research approach focuses on devising new techniques that effectively close these gaps, incorporate key computational aerodynamics paradigms such as the Discontinuous Galerkin concept and the variational multiscale method for large eddy turbulence modeling, and enable high-order accuracy beyond established second-order codes. The superior design-through-analysis capabilities are demonstrated for multistage unsteady aerodynamic simulations of turbine components, involving complex blade geometries, turbulent high-Reynolds-number flows and moving fluid domains.

从计算机辅助几何设计到基于物理的计算机模拟的转变需要几何处理和网格生成程序，这通常对创建快速设计到分析工作流程构成重大障碍。 该项目属于教师早期职业发展（CAREER）计划，其目标是通过开发新的计算方法来消除这些障碍，从而实现无缝集成和自动化。 涡轮机械是一项关键的能源技术，例如电力生产和航空运输。 该项目设想的全新设计分析方法旨在从根本上促进基于仿真的涡轮机械设计和优化。 这些可以导致设计程序的重大改进，从而服务于国家利益，促进国家繁荣，并实现提高可持续性和能源效率的非常规涡轮机械设计。 该项目的结果还促进了计算科学的进步，特别是为当前非定常全轮模拟的发展做出了重大的方法论进步。 该项目包括一个教育部分，将新的夏令营与高中生和本科生的研究实习机会结合起来。 它提供了激发 K-12 和本科生体验的机会，激励参与者参加工程学高级学位课程，特别关注少数族裔和代表性不足的群体。 这将直接加强明尼苏达大学 STEM 推广的基础设施，并有助于发展和维持一支训练有素的 STEM 劳动力队伍，这对于美国相关行业的未来竞争力非常重要。该研究方法围绕将参数几何建模与用于集成计算空气动力学的新嵌入式域有限元方法相结合的想法。 虽然参数化建模技术可用于商业设计工具，但嵌入式领域方法仍然受到严重的技术差距的困扰，阻碍了其在高保真空气动力学中的应用。 示例包括小切割元素对条件和时间步长的不利影响、切割元素中正交规则的低阶精度以及不适合新兴异构计算架构的算法。 研究方法的重点是设计有效缩小这些差距的新技术，结合关键的计算空气动力学范式，例如不连续伽辽金概念和用于大涡流建模的变分多尺度方法，并实现超越已建立的二阶代码的高阶精度。 涡轮机部件的多级非定常空气动力仿真（涉及复杂的叶片几何形状、湍流高雷诺数流和移动流体域）展示了卓越的从设计到分析的能力。

项目成果

The multiscale finite element method for nonlinear continuum localization problems at full fine-scale fidelity, illustrated through phase-field fracture and plasticity

• DOI: 10.1016/j.jcp.2019.06.058
• 发表时间: 2019-11
• 期刊: J. Comput. Phys.
• 作者: L. H. Nguyen;D. Schillinger

Residual-Based Variational Multiscale Modeling in a Discontinuous Galerkin Framework

• DOI: 10.1137/17m1147044
• 发表时间: 2017-09
• 期刊: Multiscale Model. Simul.
• 作者: S. Stoter;S. Turteltaub;S. Hulshoff;D. Schillinger

Consistent discretization of higher-order interface models for thin layers and elastic material surfaces, enabled by isogeometric cut-cell methods

• DOI: 10.1016/j.cma.2019.03.010
• 发表时间: 2019-06
• 期刊: Computer Methods in Applied Mechanics and Engineering
• 影响因子: 7.2
• 作者: Z. Han;S. Stoter;Chien-Ting Wu;Changzheng Cheng;Angelos Mantzaflaris;S. Mogilevskaya;D. Schillinger

A residual-driven local iterative corrector scheme for the multiscale finite element method

• DOI: 10.1016/j.jcp.2018.10.030
• 发表时间: 2019-01
• 期刊: J. Comput. Phys.
• 作者: L. H. Nguyen;D. Schillinger