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Design method of grooved annular treatment casing of ship gas turbine compressor

A technology for dealing with casings and gas turbines, applied in design optimization/simulation, geometric CAD, etc., to achieve the effect of improving surge margin index, excellent stability expansion effect, 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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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a method for designing a marine gas turbine compressor with a grooved annular processing casing that solves the design problem of a marine gas turbine compressor with a grooved annular processing casing

Method used

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  • Design method of grooved annular treatment casing of ship gas turbine compressor
  • Design method of grooved annular treatment casing of ship gas turbine compressor
  • Design method of grooved annular treatment casing of ship gas turbine compressor

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Embodiment Construction

[0030] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0031] to combine Figure 1-3 , a kind of marine gas turbine compressor band slot annular processing case design method of the present invention is realized through the following steps:

[0032] Step 1: Select the typical working conditions for the design of the grooved ring-type handling casing. 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;

[0033] 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. Since the principle of expanding the st...

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Abstract

The invention aims to provide a method for designing a grooved ring type processing casing of a ship gas turbine compressor, which comprises the following steps of: selecting a typical working condition, and obtaining an axial characteristic position of the grooved ring type processing casing by analyzing pneumatic parameter distribution of a flow field close to a surge point under the typical working condition; 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 the grooved ring; determining the lengths of the chamber 1 and the chamber 2 of the grooved ring processing casing; selecting three influence factors including the slotting radius, the slotting length and the slotting number of the slotted ring to design a structural scheme; performing 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. 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): G06F30/15G06F30/23
Inventor 张舟王琦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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