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Transition state engine simulation modeling method

A simulation modeling and engine technology, which is applied in the aviation field, can solve the problems that the simulation period is as long as several seconds and cannot meet the real-time simulation, and achieve the effects of short modeling period, wide applicability and high calculation accuracy

Inactive Publication Date: 2015-03-04
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

[0005] The engine simulation model established by this method has high simulation accuracy, but the simulation cycle is as long as several seconds, which cannot meet the requirements of real-time simulation

Method used

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  • Transition state engine simulation modeling method
  • Transition state engine simulation modeling method
  • Transition state engine simulation modeling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Embodiment: This example is an American F404 turbofan engine. The engine steady-state performance model is constructed by using the modeling method combining the component method and the interpolation method. Combined with the engine dynamic response model obtained from the statistics of the engine transition state test data, the transition state engine simulation is carried out. Model modeling.

[0043] Specific steps are as follows:

[0044] 1) Construct the engine component level model, see figure 1 , according to the selected F404 turbofan engine, its published component characteristics are obtained as follows:

[0045] The total pressure recovery coefficient of the characteristic data of the inlet port is 0.99;

[0046] Compressor efficiency 0.98; compressor boost ratio 21;

[0047] The combustion efficiency of the combustion chamber is 0.88; the total pressure loss of the combustion chamber is 0.12;

[0048] Turbo expansion ratio 2.1; Turbine efficiency 0.89; ...

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Abstract

The invention belongs to power plant systems in the aeronautic technology field, and relates to a transition state engine simulation modeling method. The transition state engine simulation modeling method includes: 1.1) performing a component characteristic test of all components of an engine so as to obtain component characteristics; 1.2) building a component level model of the engine; 1.3) building a steady state performance database of the engine; 1.4) using an interpolation method for modeling; 1.5) building a dynamic characteristic database of the engine; 1.6) using a two dimension interpolation method to build a dynamic response model of the engine; 1.7) completing the modeling of a transition state engine simulation model. The transition state engine simulation modeling method is wide in simulation range, high in computation accuracy, easy to implement and good in engineering applicability, and achieving real time simulation.

Description

technical field [0001] The invention belongs to the power plant system in the technical field of aviation, and relates to a simulation modeling method of a transition state engine. Background technique [0002] In aircraft design, engine simulation models are often used to carry out aircraft simulation verification based on performance simulation results. Engine simulation model modeling includes steady-state performance model and dynamic response model modeling. [0003] The existing engine steady-state performance model is modeled by the component method, which is characterized in that the characteristics of each component are known, the control scheme is selected, the common working point is determined according to the common working conditions of each component, and then the engine thrust and fuel consumption rate are calculated. Due to the complex mutual constraints among the various components of the engine, it is necessary to repeatedly iterate the values ​​of multip...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 刁科锋李大珩于新李吉阳田野
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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