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Starting modeling method of a gas turbine engine

A technology of engine starting and modeling method, applied in instrument, geometric CAD, calculation, etc., can solve problems such as high test cost and long cycle

Active Publication Date: 2019-02-22
BEIJING POWER MACHINERY INST
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Problems solved by technology

If the traditional mechanism modeling method is used, it is necessary to accurately measure the characteristics of aerodynamic components, combustion efficiency characteristics, windmill characteristics, and internal and external content matching characteristics during the start-up process through experiments, which requires special test equipment, high test costs and long time. For many small engines, the above test conditions are simply not available

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  • Starting modeling method of a gas turbine engine
  • Starting modeling method of a gas turbine engine
  • Starting modeling method of a gas turbine engine

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Embodiment Construction

[0085] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0086] The embodiment of the present invention takes a turbofan engine as an example, and proposes a gas turbine start-up modeling method based on similarity theory, including the following steps:

[0087] Step 1. Extract the high turning acceleration according to the engine test data Variation gauge (equivalent to standard atmospheric conditions).

[0088] high turning acceleration is the function of the high-turn converted speed N2c and the converted fuel flow Wfc, that is, For i=1,2,3...n trials, where j=1,2,3...m is recorded in the i-th trial i The data at sampling time (m i is the total number of sampling moments in the i-th trial), and the sampling interval is dt. For the j-th sampling instant in the i-th...

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Abstract

The invention relates to a starting modeling method of a gas turbine engine, which relates to the technical field of modeling and simulation of the gas turbine engine. The invention provides a starting modeling method of a gas turbine engine based on a similarity theory. The method comprises the following steps: a calculation method of a high-rotation acceleration, a high-rotation speed, a low-rotation speed and a high-pressure compressor outlet pressure based on the similarity theory; and a method for calculating the turbine interstage temperature according to the aerothermodynamic process ofthe core engine using the above calculation results. This method can simulate the main parameters of engine starting process with high precision, and only based on engine test data to establish engine starting model. It has the advantages of simple method, small calculation amount, low requirement for modeling prerequisite conditions, and the model accuracy can meet the needs of engineering application.

Description

technical field [0001] The invention relates to the technical field of gas turbine engine modeling and simulation, in particular to a gas turbine engine starting modeling method. Background technique [0002] In the design and development process of aviation gas turbine engine starting control law and control algorithm, a more accurate engine starting model is needed. If the traditional mechanism modeling method is used, it is necessary to accurately measure the characteristics of aerodynamic components, combustion efficiency characteristics, windmill characteristics, and internal and external content matching characteristics during the start-up process through experiments, which requires special test equipment, high test costs and long time. For many small engines, the above test conditions are not available at all. Contents of the invention [0003] (1) Technical problems to be solved [0004] The technical problem to be solved by the present invention is: how to desig...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 苏承毅王明杰刘丹李岩卜贤坤邵伏永
Owner BEIJING POWER MACHINERY INST
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