Design and computational fluid dynamics analysis of the last stage of innovative gas-steam turbine

IF 0.8 Q4 THERMODYNAMICS

Archives of Thermodynamics Pub Date : 2023-07-20 DOI:10.24425/ATHER.2021.XXXXXX

S. Głuch, P. Ziółkowski, Ł. Witanowski, J. Badur

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引用次数: 4

Abstract

Research regarding blade design and analysis of flow has been attracting interest for over a century. Meanwhile new concepts and design approaches were created and improved. Advancements in information technologies allowed to introduce computational fluid dynamics and computational flow mechanics. Currently a combination of mentioned methods is used for the design of turbine blades. These methods enabled us to improve flow efficiency and strength of turbine blades. This paper relates to a new type turbine which is in the phase of theoretical analysis, because the working fluid is a mixture of steam and gas generated in a wet combustion chamber. The main aim of this paper is to design and analyze the flow characteristics of the last stage of gas-steam turbine. When creating the spatial model, the atlas of profiles of reaction turbine steps was used. Results of computational fluid dynamics simulations of twisting of the last stage are presented. Blades geometry and the computational mesh are also presented. Velocity vectors, for selected dividing sections that the velocity along the pitch diameter varies greatly. The blade has the shape of its cross-section similar to action type blades near the root and to reaction type blades near the tip. Velocity fields and pressure fields show the flow characteristics of the last stage of gas-steam turbine. The net efficiency of the cycle is equal to 52.61%.

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新型燃气轮机末级的设计与计算流体动力学分析

一个多世纪以来，关于叶片设计和流动分析的研究一直引起人们的兴趣。同时，新的概念和设计方法被创造和改进。信息技术的进步使得计算流体力学和计算流动力学得以引入。目前，上述方法的组合用于涡轮叶片的设计。这些方法使我们能够提高涡轮叶片的流动效率和强度。本文涉及一种新型涡轮，由于其工作流体是在湿式燃烧室中产生的蒸汽和气体的混合物，因此处于理论分析阶段。本文的主要目的是对燃气轮机末级的流动特性进行设计和分析。在建立空间模型时，采用了反应涡轮台阶剖面图谱。给出了最后一级扭转的计算流体力学模拟结果。给出了叶片的几何形状和计算网格。速度矢量，对于沿节径方向速度变化较大的选定分段。叶片的横截面形状在根部附近类似于作用型叶片，在尖端附近类似于反应型叶片。速度场和压力场反映了燃气轮机末级的流动特性。该循环的净效率为52.61%。

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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来源期刊

Archives of Thermodynamics THERMODYNAMICS-

CiteScore

1.80

自引率

22.20%

发文量

期刊介绍： The aim of the Archives of Thermodynamics is to disseminate knowledge between scientists and engineers interested in thermodynamics and heat transfer and to provide a forum for original research conducted in Central and Eastern Europe, as well as all over the world. The journal encompass all aspect of the field, ranging from classical thermodynamics, through conduction heat transfer to thermodynamic aspects of multiphase flow. Both theoretical and applied contributions are welcome. Only original papers written in English are consider for publication.