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首页> 外文期刊>Journal of Engineering for Gas Turbines and Power >A New Analysis Tool Assessment for Rotordynamic Modeling of Gas Foil Bearings
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A New Analysis Tool Assessment for Rotordynamic Modeling of Gas Foil Bearings

机译：翼型轴承转子动力学建模的新分析工具评估

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Gas foil bearings offer several advantages over traditional bearing types that make them attractive for use in high-speed turbomachinery. They can operate at very high temperatures, require no lubrication supply (oil pumps, seals, etc.), exhibit very long life with no maintenance, and once operating airborne, have very low power loss. The use of gas foil bearings in high-speed turbomachinery has been accelerating in recent years although the pace has been slow. One of the contributing factors to the slow growth has been a lack of analysis tools, benchmarked to measurements, to predict gas foil bearing behavior in rotating machinery. To address this shortcoming, NASA Glenn Research Center (GRC) has supported the development of analytical tools to predict gas foil bearing performance. One of the codes has the capability to predict rotordynamic coefficients, power loss, film thickness, structural deformation, and more. The current paper presents an assessment of the predictive capability of the code named XLGFBTH. A test rig at GRC is used as a simulated case study to compare rotordynamic analysis using output from the code to actual rotor response as measured in the test rig. The test rig rotor is supported on two gas foil journal bearings manufactured at GRC with all pertinent geometry disclosed. The resulting comparison shows that the rotordynamic coefficients calculated using XLGFBTH represent the dynamics of the system reasonably well especially as they pertain to predicting critical speeds.
机译：气箔轴承与传统轴承类型相比具有许多优势，这使其在高速涡轮机械中具有吸引力。它们可以在非常高的温度下运行，不需要润滑（油泵，密封件等），使用寿命长，无需维护，并且在机载运行时，功率损耗非常低。近年来，尽管速度缓慢，但在高速涡轮机械中气体箔轴承的使用仍在加速发展。导致缓慢增长的因素之一是缺乏以测量为基准的分析工具来预测旋转机械中的气箔轴承行为。为了解决这一缺点，美国宇航局格伦研究中心（GRC）支持开发可预测气箔轴承性能的分析工具。其中一种代码具有预测转子动力系数，功率损耗，薄膜厚度，结构变形等的能力。当前论文提出了对名为XLGFBTH的代码的预测能力的评估。 GRC的测试台被用作模拟案例研究，以比较使用代码输出的转子动力学分析与测试台中测得的实际转子响应。试验装置的转子支撑在两个由GRC生产的气箔轴颈轴承上，公开了所有相关的几何形状。比较结果表明，使用XLGFBTH计算的转子动力学系数可以很好地表示系统的动力学特性，尤其是在预测临界转速方面。

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