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Compressor characteristic prediction method based on modified gas seal leakage amount influence numerical model

A numerical model and characteristic prediction technology, applied in jet engine testing, gas turbine engine testing, prediction, etc., can solve problems such as gas leakage, compressor performance prediction result deviation, etc., to achieve reduced deviation, good numerical calculation convergence, and reduced Computational resource and time consumption effects

Active Publication Date: 2019-08-02
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

[0005] The purpose of the present invention is to solve the problem of deviation of compressor performance prediction results caused by the gas leakage of the gas seal structure in the flow part of the compressor during the characteristic prediction process, and to provide a compressor characteristic prediction based on the numerical model of the influence of the corrected gas seal leakage method

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  • Compressor characteristic prediction method based on modified gas seal leakage amount influence numerical model
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  • Compressor characteristic prediction method based on modified gas seal leakage amount influence numerical model

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specific Embodiment approach 1

[0028] Specific implementation mode one: combine figure 1 , figure 2 To describe this embodiment, the method for predicting the characteristics of a compressor based on the numerical model of the influence of the corrected gas seal leakage amount given in this embodiment specifically includes the following steps:

[0029] Step 1: Carry out air seal structure processing according to the meridian flow diagram of the compressor, and establish a meridian flow model of the air seal structure of the flow part located at the root of the stator blade (such as figure 2 As shown), the meridional flow model of the gas seal structure of the flow part has the required section for the definition of leakage;

[0030] Step 2. Import the established meridional flow model of the gas seal structure of the flow part into the grid division tool, and create radial lines of the meridian flow of the compressor at each inlet and outlet positions of the gas seal structure to realize the air seal str...

specific Embodiment approach 2

[0048] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the step 1 is performed in the IGG module of NUMECAFine / Turbo (a high-performance kinetic analysis software launched by NUMECA Company) software.

[0049] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0050] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the AutoGrid5 module in the NUMECA Fine / Turbo software is used as the grid division tool in Step 2 and Step 3.

[0051] Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention provides a compressor characteristic prediction method based on a modified air seal leakage amount influence numerical model, and belongs to the technical field of compressor pneumatic design and computational analysis. The objective of the invention is to solve the problem of compressor performance prediction result deviation caused by gas leakage of a through-flow part gas seal structure in a characteristic prediction process of a compressor. The method comprises the following steps: firstly, simplifying a through-flow part air seal structure, establishing a meridian through-flow model of the air seal structure, and completing grid dispersion of a whole compressor through-flow part fluid domain; adding a correction numerical model of the gas seal leakage rate to a corresponding position of a through-flow part of the gas compressor during calculation pretreatment, and completing specific numerical definition of the gas seal structure leakage rate on an interface; and carrying out three-dimensional steady viscosity numerical solution on the whole through-flow part fluid domain of the gas compressor to obtain a gas compressor performance prediction result after the through-flow gas seal leakage amount is corrected. The method is suitable for the performance prediction process of similar impeller machinery such as an industrial compressor with an air seal structure.

Description

technical field [0001] The invention relates to a method for predicting characteristics of a compressor, belonging to the technical field of compressor aerodynamic design and calculation analysis. Background technique [0002] As one of the three core components of a gas turbine, the performance of the compressor plays a decisive role in the power, efficiency and reliability of the entire gas turbine system. With the continuous improvement of gas turbine performance indicators, modern compressors are developing in the direction of high pressure ratio, high efficiency, and large surge margin, which puts forward higher requirements for the aerodynamic design of the compressor. As one of the key technologies in its aerodynamic design system, compressor characteristic prediction plays a vital role in the design and development of high-performance advanced compressors. The ability to accurately predict the characteristics of the designed compressor is the decisive factor for the...

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04G01M15/14
CPCG06Q10/04G01M15/14G06F2111/10G06F30/17G06F30/20Y02T90/00
Inventor 王琦王廷张舟洪青松朱晓明汪作心
Owner 中国船舶重工集团公司第七0三研究所
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