A type selecting method of a starter used for a turbofan engine

A turbofan and engine technology, which is applied in the starting of the engine, the starting of the turbine/propulsion device, and the engine components, etc., can solve the problem that there is no effective method for the selection of the engine starter, the design of the starting process of the aviation turbofan engine is difficult, and the engine starting many factors, etc.

Active Publication Date: 2015-07-01
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many and complex factors affecting engine starting, and the wide operating range of aviation turbofan engines brings difficulties to the design of the starting process
At present, there is no special definition method for starter power

Method used

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  • A type selecting method of a starter used for a turbofan engine
  • A type selecting method of a starter used for a turbofan engine
  • A type selecting method of a starter used for a turbofan engine

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Embodiment Construction

[0079] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0080] like figure 1 As shown, the entire starting process of the turbofan engine provided by the present invention is generally divided into the first starting phase A, the second starting phase B and the third starting phase C, a total of three starting phases, in order to facilitate the display of starter torque characteristics and engine The size relationship of resistance characteristics, in figure 1 The two are compared in absolute value.

[0081] The first starting sta...

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Abstract

The invention relates to a type selecting method of a starter used for a turbofan engine. The method includes following steps: 10) selecting a starter as a preset starter; 20) dividing the revolving speed of a high-pressure rotor of the turbofan engine into a plurality of speed sections from zero to the idle speed, calculating unbalanced moments of two revolving speed nodes in each speed section, further calculating the average unbalanced moment and a starting time which are corresponding to each speed section, and adding the starting time of each speed section to obtain the starting time needed for the preset starter; and 30) comparing the starting time needed for the preset starter with a starting time range needed for the turbofan engine, wherein if the starting time needed for the preset starter is in the starting time range needed for the turbofan engine, starter type selecting is finished, and the maximum output power of the selected starter is outputted; and otherwise, a starter is selected again by combination of the maximum output power of the preset starter.

Description

technical field [0001] The invention relates to the field of engines, in particular to a method for selecting a starter used in a turbofan engine. Background technique [0002] The quality of the starting system has a direct impact on flight safety, engine reliability and service life, so special consideration should be given when designing the engine. There are many and complex factors affecting engine starting, and the wide operating range of aviation turbofan engines brings difficulties to the design of the starting process. At present, there is no special definition method for starter power in China. Some empirical formulas are mainly used for preliminary evaluation when designing the engine starting system. There is no effective method, and some existing methods will increase the iterative process and prolong the design cycle. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to propose a method for selecting a...

Claims

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Application Information

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IPC IPC(8): F02C7/26
Inventor 邓潇陈秋宏邱建易海云
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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