WR21 marine gas turbine thermodynamic simulator for ship propulsion studies

U. Campora
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Abstract

An original modular mathematical model, based on physical laws, for steady state and dynamics performance simulation of the WR21 gas turbine is presented in the paper. The model, developed in Matlab-Simulink language, is organized in modular form. Each gas turbine component (i.e. compressor, turbine, combustor, heat exchanger) is modelled in a specific simulator block, that simulates the performance of its pertinent component by means of steady state performance maps and/or correlations, time dependent momentum, energy and mass equations, nonlinear algebraic equations. The great application flexibility of the component simulator modules, allows to modelling any gas turbine layout (i.e. axial or radial flow compressor and turbine, rotating shafts number, heat exchangers). The WR21gas turbine, developed mainly for marine propulsion application, is a three shafts gas turbine with thermal regeneration. It is characterized by a high thermodynamic efficiency, which remains high up to 30% of the design power. The WR21 simulator results are validated by comparison with manufacturer or literature data. The WR21 gas turbine main performances are compared to those of the LM 2500 gas turbine, obtained by a previously author paper. The LM 2500 is the gas turbine currently most used in naval propulsion plants. In the article, a comparison between the steady state working data of the two gas turbines is reported in tabular and graphical form and commented.
用于船舶推进研究的 WR21 船用燃气轮机热力学模拟器
本文介绍了一个基于物理定律的原创模块化数学模型,用于 WR21 燃气轮机的稳态和动态性能仿真。该模型采用 Matlab-Simulink 语言开发,以模块化形式组织。每个燃气轮机组件(即压缩机、涡轮机、燃烧器、热交换器)都在一个特定的模拟器模块中建模,该模块通过稳态性能图和/或相关性、与时间相关的动量、能量和质量方程以及非线性代数方程来模拟相关组件的性能。组件模拟器模块具有极大的应用灵活性,可对任何燃气轮机布局(即轴向或径向流压缩机和涡轮机、旋转轴数、热交换器)进行建模。WR21 燃气轮机主要为船舶推进应用而开发,是一种带热再生功能的三轴燃气轮机。它的特点是热动力效率高,在设计功率的 30% 以下仍保持很高的效率。WR21 模拟器的结果通过与制造商或文献数据的比较进行了验证。WR21 燃气轮机的主要性能与 LM 2500 燃气轮机的性能进行了比较,LM 2500 燃气轮机的性能是由作者之前的一篇论文获得的。LM 2500 是目前海军推进装置中使用最多的燃气轮机。文章以表格和图表的形式对两台燃气轮机的稳态工作数据进行了比较,并给出了评论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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