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An aero-engine modeling method with a CDFS structure

A technology of aero-engine and modeling methods, applied in geometric CAD, computer-aided design, special data processing applications, etc., can solve problems such as different flow paths, complex configurations, inability to mix multiple flows in real-time calculations, etc.

Active Publication Date: 2019-04-26
AECC SHENYANG ENGINE RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] For an aero-engine with a CDFS (Core Driven Fan) structure, it can change the thermal cycle by changing the geometric shape, size, position, etc. Advanced but more complex configuration
For aero-engines with a CDFS (Core Driven Fan) structure, there is a bleed duct after the CDFS, but the existing engine real-time model does not have a corresponding component-level model; The flow path of the engine real-time model is different, and the existing engine real-time model cannot perform real-time calculation for multi-stream mixing

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  • An aero-engine modeling method with a CDFS structure
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[0039] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...

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Abstract

The invention belongs to the field of aero-engines, and particularly relates to an aero-engine modeling method with a CDFS structure. The method comprises the steps of 1, constructing a numerical model of the CDFS; 2, a numerical model of a front duct ejector is constructed according to the numerical model of the CDFS, and the front duct ejector is used for controlling the outlet area of the firstouter duct and the outlet area of the front mixing chamber; Step 3, constructing a balance equation when the selection valve is opened and closed; wherein when the selection valve is opened, a frontmixing chamber inlet airflow static pressure balance equation and a front mixing chamber airflow total pressure balance equation considering the volume effect are constructed, and opening and closingof the selection valve correspond to opening and closing of an inlet of the second outer culvert respectively. According to the invention, the numerical model of the CDFS and the numerical model of the CDFS post-deflation duct are constructed, and the real-time mixing condition of the multiple air flows of the aero-engine with the CDFS structure is calculated, so that the purpose of real-time numerical simulation is achieved.

Description

technical field [0001] The application belongs to the field of aero-engines, in particular to an aero-engine modeling method with a CDFS structure. Background technique [0002] The aero-engine model is an important means and tool used in the development of the engine. It can express the characteristics of the various parts of the engine in a mathematical manner, perform numerical simulation on the performance of the engine, and effectively reduce the cost of engine development and the risk of testing. It is very important for the development of the engine. significance. The real-time model is a mathematical model that can reflect the working state of the engine in real time. The model requires that the time for calculating various engine states in the computer is equal to the time for the real engine to work in the same state, and requires that the time for each step calculated by the real-time model is also the same as that of the real engine. same. The real-time model c...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 梁彩云张博文李睿隋岩峰阎巍张德志
Owner AECC SHENYANG ENGINE RES INST