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.

该建议集中在轴流压缩机上，因为这些压缩机能够产生高的压缩效率。 高质量流率和压力比的压缩气体。轴流压缩机具有多个叶片排 或者是对流体做功以增加其总焓的翼型。由于旋转运动的不稳定湍流 产生可压缩流，这常常引起复杂的气动弹性现象， 影响引起翼型颤振的结构的动态行为。如果翼型结构没有设计 它可能会产生灾难性的后果。因此，重要的是要了解和量化颤振 现象具有安全、可靠和高效的设计。考虑到这一问题的多学科性质， 问题，它需要在有限元分析和计算流体力学技术的专业知识沿着高计算效率 算法和设施。在控制CFD网格时，需要流体-结构相互作用（FSI）模型 应该与计算结构力学（CSM）反应，以获得准确的结果。主要目的 提出的研究项目的目的是通过执行流体-结构 通过研究3.5级轴流压气机的颤振响应研究了其相互作用。一系列CFD和CSM分析 应在各种发动机运行条件下进行。生命预测技术公司（LPTi）应 提供压缩机的几何形状，并通过共享资源和知识与工作负载共享 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，商业求解器ANSYS的能力，这些结果应 然后与模拟输出进行比较。