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Method for designing spoiler type processing casing of return cavity of gas compressor of ship gas turbine

A gas turbine and casing processing technology, which is applied in design optimization/simulation and other directions to achieve the effect of improving surge margin indicators, reducing resource and time consumption, and simplifying the workload of designers

Active 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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Problems solved by technology

[0004] The object of the present invention is to provide a design method for a ship gas turbine compressor return cavity-spoiler type processing casing that solves the design problem of the ship gas turbine compressor return cavity-spoiler type processing casing

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  • Method for designing spoiler type processing casing of return cavity of gas compressor of ship gas turbine
  • Method for designing spoiler type processing casing of return cavity of gas compressor of ship gas turbine
  • Method for designing spoiler type processing casing of return cavity 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] to combine Figure 1-3 According to the present invention, a specific embodiment of the design method of the gas turbine compressor return cavity of the ship-spoiler type processing casing is realized by the following steps:

[0034] Step 1: Select the typical working conditions of the return chamber-spoiler type 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 meridi...

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Abstract

The invention aims to provide a method for designing a spoiler type processing casing of a return cavity 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 determining an axial characteristic position of the spoiler type processing casing of the return cavity; extracting an inlet absolute airflow angle and an inlet relative airflow angle at the blade top of the movable blade at the feature position so as to determine an air inlet radial angle and an air outlet radial angle of the spoiler; selecting three influence factors including the outer diameter of the spoiler, the length of the spoiler and the number of the spoilers to design a structural scheme; respectively carrying out numerical calculation on different structural design schemes to determine an optimal scheme; and 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 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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IPC IPC(8): G06F30/23G06F30/28
Inventor 张舟王琦洪青松金鹏王廷万新超张亮
Owner 中国船舶重工集团公司第七0三研究所
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