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Low-working-condition interstage deflation anti-surge method for low-pressure compressor of marine gas turbine

A technology of gas turbines and compressors, applied in the direction of machines/engines, mechanical equipment, computer-aided design, etc., can solve problems such as insufficient surge margin, improve design efficiency, expand the working range of efficient and stable operation, and shorten the design cycle Effect

Pending Publication Date: 2021-12-14
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 method for anti-surge prevention between stages of a low-pressure compressor of a marine gas turbine low-pressure compressor that can solve problems such as insufficient surge margin

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  • Low-working-condition interstage deflation anti-surge method for low-pressure compressor of marine gas turbine

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Embodiment Construction

[0023] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0024] combine figure 1 , the present invention a kind of marine gas turbine low-pressure compressor low working condition inter-stage deflation anti-breathing design method is realized by the following steps:

[0025] Step 1: Three-dimensional CFD calculation and analysis of the low-pressure compressor. Through three-dimensional CFD calculation, the characteristic curve of the compressor and the position of the stall area at the boundary point of surge under low operating conditions are obtained. Usually, on the basis of a given compressor speed, total inlet temperature and total pressure, the characteristic curve of the compressor at this speed is obtained by changing the static pressure value of the compressor outlet, and the divergence point of the numerical calculation of the compressor is found, and the critical divergence is taken. The point is used as th...

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Abstract

The invention aims to provide a low-working-condition interstage deflation anti-surge method for a low-pressure compressor of a marine gas turbine, which comprises the following steps: obtaining a characteristic curve of a low-pressure compressor and a stall area position at a low-working-condition surge boundary point through three-dimensional CFD calculation, carrying out simulation analysis on the overall performance of the whole machine, according to the stall area position, obtained through three-dimensional CFD calculation, of the low-pressure compressor under the low working condition when the low-pressure compressor is close to a surge point, preliminarily determining a low-pressure compressor interstage deflation position scheme, performing permutation and combination according to the preliminarily determined deflation amount and deflation position, screening a sample scheme out, and determining a final low-pressure compressor interstage deflation scheme. While the surge margin is improved, the influence of interstage deflation on internal flow of the compressor is reduced to the minimum, and the efficient and stable operation working range of the low-pressure compressor is effectively expanded.

Description

technical field [0001] The invention relates to a gas turbine control method, in particular to a compressor anti-surge method. Background technique [0002] As one of the three core components of the marine gas turbine, the performance, reliability and stability of the compressor directly affect the realization of the safety, technical and economic indicators of the marine gas turbine. For marine gas turbines, in order to adapt to the technical requirements of the ship during navigation, the unit must ensure the performance of high working conditions, and at the same time, pay special attention to the stable operation of the margin under low working conditions. The operating characteristics of marine gas turbines with a wide range of variable working conditions make the stability of their compressors, especially low-pressure compressors, very prominent. Therefore, in order to make the marine gas turbine have a wider stable working range and better performance under variable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28F04D27/02G06F113/08G06F119/14
CPCG06F30/28F04D27/0207G06F2113/08G06F2119/14Y02T90/00
Inventor 王琦肖舒宁张舟洪青松吴思宇
Owner 中国船舶重工集团公司第七0三研究所
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