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首页> 外文期刊>Journal of the American Helicopter Society >Performance Characterization of Turboshaft Engines Using Work Potential Methods
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Performance Characterization of Turboshaft Engines Using Work Potential Methods

机译：利用工作势法表征涡轮轴发动机的性能

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摘要

This paper develops and describes work potential analysis methods applicable to turboshaft engine flow-fields. These methods are based on the second-law of thermodynamics and enable a unified, comprehensive assessment of engine performance at the part, component, and system levels. The focus herein is on using gas specific power as a work and loss figure of merit for analyzing turboshaft engines. This is shown to be a useful tool for assessing local performance potential in a gas turbine flow-field. The fundamental relationships between heat, work, and irreversibility in turboshaft engines are then developed and the relationship of flow irreversibility to engine performance losses is discussed. These theoretical ideas are formulated in a method that enables characterization of performance losses in terms of engine spatial location and loss mechanism. This method is then demonstrated at the engine system level via cycle analysis, at the component level via quasi 1-D analysis, and at the part level via a stator row multi-dimensional computational fluid dynamics simulation analyzed in terms of irreversible entropy production.
机译：本文开发并描述了适用于涡轮轴发动机流场的工作潜力分析方法。这些方法基于热力学第二定律，可以在零件，组件和系统级别对发动机性能进行统一，全面的评估。本文的重点在于使用气体比功率作为分析涡轮轴发动机的功和损耗因数。已显示这是评估燃气轮机流场中局部性能潜力的有用工具。然后发展了涡轮轴发动机中热量，功和不可逆性之间的基本关系，并讨论了流量不可逆性与发动机性能损失之间的关系。这些理论思想是用一种方法来制定的，该方法能够根据发动机的空间位置和损失机理来表征性能损失。然后，通过循环分析在发动机系统级别，通过准一维分析在组件级别，在零件级别通过通过不可逆熵产生进行分析的定子行多维计算流体动力学仿真，证明了该方法。

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