Combustion chamber outlet temperature evaluation method under complete engine condition
A technology of outlet temperature and engine, applied in computer-aided design, special data processing applications, geometric CAD, etc., can solve problems such as large deviation of actual results, inability to accurately determine air flow, and inability to realize engineering applications well
Pending Publication Date: 2021-09-07
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
The engine heat balance method is used to calculate the outlet temperature of the combustion chamber. Since parameters such as the inlet flow rate of the compressor and the total temperature and pressure at the outlet of the high-vortex turbine cannot be measured under the condition of the whole machine, it is impossible to accurately determine the air flow rate participating in the combustion. The combustion chamber is calculated by the heat balance method. The outlet temperature will get multiple sets of results, which deviate greatly from the actual results, and cannot be well implemented in engineering applications at the technical level.
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[0033] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes 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 present 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 implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...
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The invention belongs to the technical field of aero-engine tests, and particularly relates to a combustion chamber outlet temperature evaluation method under the complete engine condition. The method comprises the steps that S1, the initial value of the high-pressure compressor inlet conversion flow is given; S2, the outlet temperature of a main combustion chamber and the high-pressure turbine throat conversion flow are sequentially calculated; S3, the measured high-pressure turbine throat conversion flow is obtained and compared with the high-pressure turbine throat conversion flow calculated in the step S2, and a relative error is determined; and S4, if the relative error is larger than a preset value, the high-pressure compressor inlet conversion flow is corrected according to the calculated and measured high-pressure turbine throat conversion flow, new high-pressure compressor inlet conversion flow is formed, and iterative calculation is conducted till the main combustion chamber outlet temperature is determined. The initial value of the inlet flow of the gas compressor is given, the outlet temperature of the combustion chamber in the whole engine state is iteratively solved, and the outlet temperature of the main combustion chamber is accurately evaluated.
Description
technical field [0001] The application belongs to the technical field of aero-engine testing, and in particular relates to a method for evaluating the outlet temperature of a combustion chamber under the condition of a complete engine. Background technique [0002] At present, parameters such as the rotational speed and the total temperature of the inlet and outlet of the fan compressor can be directly measured in the complete state of the dual-rotor turbofan engine, but the outlet temperature of the combustion chamber cannot be measured, mainly because the outlet temperature of the combustion chamber is often as high as 1800-2000K under the condition of the complete engine. Some temperature sensors cannot directly and reliably measure the temperature, resulting in the inability to accurately evaluate the engine state, and problems such as over-temperature ablation may occur. [0003] The current method is to use the overall performance simulation model of the engine to calc...
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IPC IPC(8): G06F30/17G06F119/08
CPCG06F30/17G06F2119/08
Inventor 张雪冬张志舒陈仲光好毕斯嘎拉图贾琳渊阮文博邴连喜杨大军
Owner AECC SHENYANG ENGINE RES INST