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 th

Method used

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

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Example Embodiment

[0028] Specific embodiment one: combination figure 1 , figure 2 To explain this embodiment, the compressor characteristic prediction method based on the numerical model of the modified air seal leakage influence numerical model given in this embodiment specifically includes the following steps:

[0029] Step 1. Carry out the air seal structure treatment for the compressor meridian flow diagram, and establish the meridian flow model of the air seal structure of the flow part at the root of the stationary blade (such as figure 2 (Shown), the meridian flow model of the air seal structure of the flow part has a profile required for the definition of leakage;

[0030] Step 2: Import the established meridian flow model of the air seal structure of the flow part into the grid division tool, and create the radial line of the meridian flow of the compressor at the inlet and outlet positions of the air seal structure to realize the air seal structure and compressor Completely matched connec...

Example Embodiment

[0048] Specific embodiment two: this embodiment is different from specific embodiment one in that the step one is performed in the IGG module of the NUMECAFine / Turbo (high-performance kinetic analysis software launched by NUMECA) software.

[0049] The other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0050] Specific embodiment three: this embodiment is different from specific embodiment two in that in step two and step three, the AutoGrid5 module in the NUMECA Fine / Turbo software is used as a meshing tool.

[0051] The 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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