Analysis of Flow Field Distortion in Ship Inlet System and Its Effect on Compressor Performance

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-02-01 DOI:10.47176/jafm.17.02.2101

Z. Y. Wang, †. C.X.He, Y. Qu

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引用次数: 0

Abstract

Intake system structure design is categorized under gas turbine marine technology, and its performance affects the inlet flow field of the compressor, thereby impacting the overall operation stability of the gas turbine. Therefore, this study analyses the structural characteristics of various types of intake systems and establishes a computational domain model. Numerical simulation methods are used to systematically study the internal and external flow fields of the intake system. By varying the structure of the intake system, we compare and study the distribution form of the flow field inside and outside the intake system, velocity and total pressure distribution of the compressor inlet section, and flow loss inside the intake system. The speed and total pressure distortion of the compressor inlet section are analysed quantitatively. It was concluded that inlet distortion causes the leakage flow from some channels to spill into adjacent blade channels at the leading edge of the higher span, resulting in an early compressor stall. Specifically, the compressor stall and working flow margins are reduced by 2.51% and 2.76%, respectively.

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船舶进气系统中的流场畸变及其对压缩机性能的影响分析

进气系统结构设计属于燃气轮机船用技术范畴，其性能会影响压缩机的进气流场，从而影响燃气轮机的整体运行稳定性。因此，本研究分析了各类进气系统的结构特征，并建立了计算域模型。采用数值模拟方法系统地研究了进气系统的内部和外部流场。通过改变进气系统的结构，比较并研究了进气系统内外流场的分布形式、压缩机入口段的速度和总压分布以及进气系统内部的流动损失。对压缩机入口段的速度和总压畸变进行了定量分析。结果表明，入口变形会导致一些通道的泄漏流溢出到较高跨度前缘的相邻叶片通道，从而导致压缩机提前失速。具体来说，压缩机失速和工作流量裕度分别降低了 2.51% 和 2.76%。

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

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .