Method for designing circumferential groove type processing casing of gas compressor of ship gas turbine

A technology for processing casings and gas turbines, applied in computer-aided design, electrical digital data processing, design optimization/simulation, etc., to achieve the effect of excellent stability expansion, simplifying the workload of designers, and improving surge margin indicators

Inactive Publication Date: 2021-04-20
中国船舶重工集团公司第七0三研究所
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a design method for the circumferential groove treatment casing of the gas turbine compressor of the ship which solves the design problem of the circumferential groove treatment casing of the gas turbine compressor of the ship

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  • Method for designing circumferential groove type processing casing of gas compressor of ship gas turbine
  • Method for designing circumferential groove type processing casing of gas compressor of ship gas turbine
  • Method for designing circumferential groove type processing casing of gas compressor of ship gas turbine

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Embodiment Construction

[0032] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0033] combine Figure 1-3 , a kind of marine gas turbine compressor circumferential groove type processing case design method of the present invention is realized through the following steps:

[0034] Step 1: Select the typical working conditions of the circumferential groove processing casing design. According to the aerodynamic design results of the compressor, the working condition with the smallest surge margin in each working condition is selected as the typical working condition, and the general typical working condition is selected near the low speed working condition of the compressor;

[0035] Step 2: Analyze the distribution of aerodynamic parameters of the flow field near the puff point under typical working conditions, including the relative total pressure and relative Mach number distribution on the meridian plane. The radial velocity induced by th...

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Abstract

The invention aims to provide a method for designing a circumferential groove type processing casing of a gas compressor of a ship gas turbine, which comprises the following steps of: selecting a typical working condition according to a pneumatic design result of the gas compressor, and obtaining an axial characteristic position of the circumferential groove type processing casing; extracting an inlet absolute airflow angle and an inlet relative airflow angle at the top of the moving blade at the axial characteristic position close to the surge point under a typical working condition so as to determine a slotting angle of a circumferential slot; determining a gap value between the circumferential grooves; selecting three influence factors including the circumferential groove depth, the circumferential groove width and the circumferential groove number to perform structural scheme design; respectively carrying out numerical calculation on different structural design schemes to determine an optimal scheme; and finally, performing performance analysis on the optimal scheme under the design working condition, and judging whether the design point performance of the scheme reaches the standard or not. The method is not only limited to a ship gas turbine axial flow compressor, but also suitable for the processing casing design process of various industrial gas turbine axial flow compressors with processing casings and aero-engine axial flow compressors.

Description

technical field [0001] The invention relates to a gas turbine design method, in particular to a compressor design method. Background technique [0002] As one of the three most important core components of a marine gas turbine, the compressor's technical performance and reliability directly affect the realization of the safety and economic indicators of a marine gas turbine. The marine gas turbine shall, while ensuring the performance of the design point, pay special attention to the margin and efficient operation under low working conditions. The operating characteristics under such a wide range of variable working conditions make the stability of gas turbines in low working conditions very prominent when they are used as propulsion or power generation in ship power systems, and often become the limiting bottleneck of unit performance, which has great impact on ship gas turbine compressors The performance and stability under non-design conditions put forward higher require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14
Inventor 王琦张舟潘宏伟金鹏洪青松王廷万新超张亮
Owner 中国船舶重工集团公司第七0三研究所
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