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Gas turbine dynamic working condition database sample point selection method

A gas turbine and sample point technology, applied in the direction of internal combustion engine testing, etc., can solve the problems of many sample points, large workload, complex structure, etc., and achieve the effect of reducing the range of values, reducing the workload, and reducing the sample size.

Active Publication Date: 2017-06-13
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

However, for the three-shaft gas turbine with adjustable guide vanes in the power turbine, due to the complex structure and many variables, the direct establishment of the dynamic working condition database faces the problems of too many sample points, a huge database, and a large workload

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention cover such modifications and variations as come within the scope of the...

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Abstract

The invention relates to a gas turbine dynamic working condition database sample point selection method. A gas turbine is a three-shaft type gas turbine with an adjustable power turbine guide vane. The gas turbine adopted in the method is structurally characterized in that the power turbine inlet guide vane is adjustable, and the gas turbine is provided with a high pressure shaft, a low pressure shaft and a power turbine shaft to form the three-shaft type structure. The method comprises the steps of calculating and analyzing the influence caused by turbine rotating speed on the gas turbine, calculating and analyzing the correspondence of rotating speeds of the high and low pressure shafts corresponding to the guide vane angles under the steady-state condition, calculating the changing range of the low pressure shaft rotating speed in the acceleration and deceleration process, according to the calculation result, selecting sample points, utilizing a gas turbine simulation model for obtaining sample points, forming a gas turbine dynamic working condition database and the like. According to the gas turbine dynamic working condition database sample point selection method, the power turbine guide vane angle changing phenomenon is considered by means of operating characteristics of the gas turbine, the sample point valuing range is reasonable reduced, the sample scale is greatly reduced, and workloads are reduced.

Description

technical field [0001] The invention relates to the field of calculation of the overall performance of gas turbines, and more specifically relates to a method for selecting sample points of a dynamic working condition database of a three-shaft gas turbine with adjustable guide vanes of a power turbine. Background technique [0002] In the process of gas turbine semi-physical simulation experiments and gas turbine control law research, it is necessary to calculate the unsteady working conditions of the gas turbine. The gas turbine dynamic working condition database is established through model calculation or bench test, and the gas turbine working condition can be calculated in real time by system identification. However, for the three-shaft gas turbine with adjustable guide vanes, due to the complex structure and many variables, the direct establishment of the dynamic working condition database faces the problems of too many sample points, a huge database, and a large worklo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/05
CPCG01M15/05
Inventor 谭春青王涛田拥胜高庆尹钊赵洪雷
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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