An Approximate Method to Obtain Thermodynamic Gas Properties for Use in Gas Turbines
An Approximate Method to Obtain Thermodynamic Gas Properties for Use in Gas Turbines
复制标题
获得燃气轮机使用的热力学气体特性的近似方法
DOI：
10.1115/gt2014-26205
复制
发表时间：
2014
影响因子：
1.7
通讯作者：
A. Marquis
中科院分区：
文献类型：
--
作者：
N. Cumpsty;A. Marquis
燃气轮机、涡轮增压器、压气机和涡轮机的性能计算需要气体的热力学性质。存在有效精确的属性表，但使用这些表是乏味的，并且在基于计算机的计算中远远不实用。用多项式近似表示列表结果是不方便的，并且在实现中容易出错。为了教学和简单的计算，有时使用简单的近似值，例如未燃烧空气的γ = 1.4，燃烧产物的γ = 1.3，但这远远不能完全令人满意。本文描述并讨论了一种简单的经验方法，该方法可以为许多目的提供足够的准确性，但也足够简单，可以作为教育课程的一部分。
The calculation of the performance of gas turbines, turbochargers, compressors and turbines requires the thermodynamic properties of the gases. Tables of properties exist which are effectively exact, but using these tables is tedious and far from practical in computer-based calculations. Representing tabulated results with polynomial approximations is inconvenient and prone to error in implementation. For teaching and simple calculations simple approximations, such as γ = 1.4 for unburned air and γ = 1.3 for combustion products, are sometimes used, but this is far from wholly satisfactory. This paper describes and discusses a simple empirical approach which will give adequate accuracy for many purposes but is simple enough to be used as part of an educational course.© 2014 ASME