Humidity Effects on Experimental Compressor Performance-Corrected Conditions for Real Gases
Humidity Effects on Experimental Compressor Performance-Corrected Conditions for Real Gases
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DOI：
10.1115/1.4028356
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发表时间：
2015-03-01
影响因子：
1.7
通讯作者：
Key, Nicole L.
中科院分区：
文献类型：
--
作者：
Berdanier, Reid A.;Smith, Natalie R.;Key, Nicole L.
本文研究了湿空气对多级研究用压气机性能的影响，并提出了新的湿度计算方法，以确保性能参数的适当表示。涡轮机教科书提出了使用理想气体假设来校正速度和质量流率的方法，但是当在绝对湿度可能变化的气候中使用未经调节的空气时，这些方法可能降低实现可重复的压缩机性能的能力。取而代之的是，引入了一种新的方法，该方法将湿空气建模为真实的气体，并避免了在校正过程中需要的假设。在压气机研究领域，测量性能参数的微小变化并确保可重复结果的能力至关重要。使用理想气体假设来计算校正速度可能会导致超过0.5%的误差，这可能会导致超出测量不确定性的错误表示的性能参数。乘法校正因子的分析数据的基础上，也被引入作为一种替代方法，适用于新的真实气体方法，这些校正因子相比，以前的作者适用于理想气体方法的湿度会计。这是首次在公开文献中，一个燃气涡轮机发动机的一个组成部分的实验结果比较湿空气校正方法与传统的校正方法。
The effects of humid air on the performance of a multistage research compressor and new methods of humidity accounting to ensure appropriate representation of performance parameters are investigated in this paper. Turbomachinery textbooks present methods of correcting speed and mass flow rate using perfect gas assumptions, but these methods can reduce the ability to achieve repeatable compressor performance when using unconditioned air in a climate where absolute humidity may vary. Instead, a new method is introduced, which models humid air as a real gas and circumvents the need for assumptions in the correction process. In the area of compressor research, the ability to measure small changes in performance parameters and ensure repeatable results is essential. Errors of more than 0.5% can result from using perfect gas assumptions to calculate corrected speed, which can lead to misrepresented performance parameters beyond the uncertainty of the measurements. Multiplicative correction factors based on analytical data are also introduced as an alternate method of applying the new real-gas method, and these correction factors are compared to those derived by previous authors applying ideal gas methods for humidity accounting. This is the first time in open literature that experimental results for a component of a gas turbine engine are presented comparing a humid air correction method with traditional correction methods.