Flutter analysis of multistage compressor of gas turbine engine using fluid-structure interaction (FSI)

使用流固耦合 (FSI) 进行燃气涡轮发动机多级压缩机颤振分析

• 批准号: 488717-2015
• 负责人: Bhat, Rama
• 金额: $ 1.82万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586380
• 关键词: Flutter; analysis; multistage; compressor; gas

This proposal is focused on the axial compressor since these compressors are capable of producing highly compressed gas with high mass flow rates and pressure ratios. Axial compressors possess multiple blade rows or airfoils that work on the fluid to increase its total enthalpy. Due to the rotary motion unsteady turbulent compressible flow is generated which often gives rise to complex aeroelasticity phenomena that further influence the dynamic behavior of the structure causing airfoil flutter. If the airfoil structure is not designed adequately, it can have catastrophic consequences. It is thus important to understand and quantify the flutter phenomena to have a safe, reliable and an efficient design. Considering the multidisciplinary nature of this problem, it requires expertise in both FEA and CFD techniques along with high computational efficiency algorithms and facilities. The Fluid-Structure Interaction (FSI) models are required where governing CFD grid should react with Computational Structural Mechanics (CSM) for obtaining accurate results. The primary aim of the proposed research project is to approach and solve this problem by performing the Fluid -Structure Interaction on a 3.5 stage axial compressor by studying its flutter response. A series of CFD and CSM analyses shall be performed at various engine operating conditions. Life Prediction Technologies Inc. (LPTi) shall provide the geometry of the compressor and share with the work load by sharing their resources and knowledge in FEA and CFD simulations. In the proposed research project, the first step shall include validating the capability of the commercial solver ANSYS by running known experimental test cases and these results shall in turn be compared with the simulation output.

该提案主要针对轴流式压缩机，因为这些压缩机能够产生高 具有高质量流量和压力比的压缩气体。轴流压缩机拥有多排叶片 或对流体起作用以增加其总焓的翼型件。由于旋转运动不稳定湍流 产生可压缩流，这通常会引起复杂的气动弹性现象，从而进一步 影响导致翼型颤振的结构的动态行为。如果没有设计翼型结构 如果足够的话，它可能会带来灾难性的后果。因此，理解和量化颤振非常重要 现象，以实现安全、可靠和高效的设计。考虑到该学科的多学科性质 问题，它需要 FEA 和 CFD 技术方面的专业知识以及高计算效率 算法和设施。管理 CFD 网格时需要流固耦合 (FSI) 模型 应与计算结构力学（CSM）反应以获得准确的结果。主要目标 拟议研究项目的目的是通过执行流体结构来处理和解决这个问题 通过研究 3.5 级轴流压缩机的颤振响应来了解其相互作用。一系列 CFD 和 CSM 分析 应在不同的发动机工况下进行。 Life Prediction Technologies Inc. (LPTi) 应 提供压缩机的几何形状并通过共享资源和知识来共享工作负载 在 FEA 和 CFD 模拟中。在拟议的研究项目中，第一步应包括验证 通过运行已知的实验测试用例来验证商业求解器 ANSYS 的能力，这些结果应 依次与模拟输出进行比较。