密封丝对航空发动机涡轮叶片非线性动力学的影响

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Mertol Tufekci, Fadi El-Haddad, Loic Salles, Richard Setchfield, Ludovic Renson
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引用次数: 0

摘要

众所周知,由多个组件组成的复杂系统很难建模,因为它们的解决方案即使在最微小的条件变化下也会发生巨大变化。飞机发动机包含如此复杂的系统,飞机发动机涡轮中的某些部件可能会导致系统整体响应的重大变化。因此,本研究的重点是研究航空发动机涡轮叶片的性能,以及叶片与密封丝的接触对叶盘系统动力学的影响。研究通过各种时间和频率域的数值模拟进行。在静、模态和频域强迫响应分析中,采用锁紧板和密封丝施加循环对称边界条件,对叶片盘的一个扇形进行了有限元建模。在时域分析中,用简化的位移限制边界条件代替循环对称。时域分析包含了系统的稳态强迫响应。结果表明,与密封丝的接触不是非线性和阻尼的主要来源。与锁紧板的接触比密封丝对减振的贡献更大。然而,与叶片根部的接触相比,这两个分量在摩擦阻尼和非线性方面仍然不太重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of the Seal Wire On the Nonlinear Dynamics of the Aircraft Engine Turbine Blades
Abstract Complicated systems made of multiple components are known to be difficult to model, considering their solutions can change dramatically even with the slightest variations in conditions. Aircraft engines contain such complicated systems, and some components in aircraft engines' turbines can cause significant changes in the system's overall response. Hence, this study is focused on investigating the behavior of a turbine blade of an aircraft engine and the effects of the contact between the blade and the seal wire on the dynamics of the blade-disk system. The investigation is performed via various numerical simulations in time and frequency domains. One sector of the bladed disk is modeled using the finite element method with the lock plate and the seal wire imposing cyclic symmetry boundary conditions in the static, modal, and frequency domain forced response analyses. In time domain analyses, the cyclic symmetry is replaced with simplified displacement restricting boundary conditions. The time domain analysis contains steady-state forced responses of the system. The results show that contact with the seal wire is not a major source of nonlinearity and damping. The contacts with the lock plate contribute more to the vibration damping than the seal wire. However, compared to the contacts at the root of the blade, both components remain less significant with regard to frictional damping and nonlinearity.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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