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首页> 外文期刊>Thermal engineering >Calculation of Gas Temperature at the Outlet of the Combustion Chamber and in the Air-Gas Channel of a Gas-Turbine Unit by Data of Acceptance Tests in Accordance with ISO
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Calculation of Gas Temperature at the Outlet of the Combustion Chamber and in the Air-Gas Channel of a Gas-Turbine Unit by Data of Acceptance Tests in Accordance with ISO

机译：根据ISO的验收数据计算燃气轮机燃烧室出口和燃气通道的气体温度。

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摘要

This article describes a high accuracy method enabling performance of the calculation of real values of the initial temperature of a gas turbine unit (GTU), i.e., the gas temperature at the outlet of the combustion chamber, in a situation where manufacturers do not disclose this information. The features of the definition of the initial temperature of the GTU according to ISO standards were analyzed. It is noted that the true temperatures for high-temperature GTUs is significantly higher than values determined according to ISO standards. A computational procedure for the determination of gas temperatures in the air-gas channel of the gas turbine and cooling air consumptions over blade rims is proposed. As starting equations, the heat balance equation and the flow mixing equation for the combustion chamber are assumed. Results of acceptance GTU tests according to ISO standards and statistical dependencies of required cooling air consumptions on the gas temperature and the blade metal are also used for calculations. An example of the calculation is given for one of the units. Using a developed computer program, the temperatures in the air-gas channel of certain GTUs are calculated, taking into account their design features. These calculations are performed on the previously published procedure for the detailed calculation of the cooled gas turbine subject to additional losses arising because of the presence of the cooling system. The accuracy of calculations by the computer program is confirmed by conducting verification calculations forthe GTU of the Mitsubishi Comp. and comparing results with published data of the company. Calculation data for temperatures were compared with the experimental data and the characteristics of the GTU, and the error of the proposed method is estimated.
机译：本文介绍了一种高精度方法，该方法可以在制造商未公开此信息的情况下，执行燃气轮机单元（GTU）初始温度（即燃烧室出口处的气体温度）实际值的计算。信息。分析了根据ISO标准定义的GTU初始温度的特征。请注意，高温GTU的真实温度明显高于根据ISO标准确定的值。提出了一种确定燃气轮机的空气通道中的气体温度以及叶片轮缘上的冷却空气消耗量的计算程序。作为开始方程式，假设燃烧室的热平衡方程式和流动混合方程式。根据ISO标准进行的GTU验收结果以及所需冷却空气消耗对气体温度和叶片金属的统计依赖性也用于计算。给出了其中一个单位的计算示例。使用开发的计算机程序，考虑到某些GTU的设计特征，可以计算出它们在空气通道中的温度。这些计算是根据先前发布的程序进行的，用于详细计算冷却的燃气轮机，但会由于存在冷却系统而产生额外的损失。通过对Mitsubishi Comp的GTU进行验证计算，可以确认计算机程序的计算准确性。并将结果与​​公司发布的数据进行比较。将温度计算数据与实验数据和GTU的特性进行了比较，并估计了该方法的误差。

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