Static pressure simulation model of axial-flow compressor leaf opex
A compressor and axial flow technology, which is applied in the field of compressor modeling and stability control, can solve the problems of difficult design of compressor stability controller, consuming manpower and material resources, etc., and achieve good signal restoration and high coincidence Effect
Inactive Publication Date: 2016-03-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
However, conducting a large number of compressor experiments not only consumes a lot of manpower and material resources, but also makes it difficult to design a stable and effective compressor stability controller.
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[0046] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0047] The static pressure signal of the compressor tip is a random pressure signal, and it has a large fluctuation with the stability of the compressor. It is difficult to directly model the static pressure signal of the compressor tip. Therefore, the present invention constructs compressor blade tip static pressure signal (C p m ) under steady conditions, and then establish the compressor tip static pressure signal (C p s ) stall pulsation mathematical model, and correct the model by stall damping (K m ) revise the mathematical model of the compressor stall pulsation according to its shortness of breath. At the same time, the phase model is established to ensure that the established three compressor sub-mathematical models maintain time-domain consistency. In particular, in the present invention, the pressure coefficient (C p ) is defined as fol...
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The invention discloses a static pressure simulation model of an axial-flow compressor leaf opex, and belongs to the technical field of compressor modeling and stability control. A static pressure model of the compressor leaf opex is constructed through four independent sub-models including a phase model, a static model of a blade path, a stall pulse model and a stall modified damping model. The static pressure model, which is established by the invention, of the compressor leaf opex exhibits a good signal reduction degree and can effectively simulate a dynamic static pressure signal of the static pressure of the compressor leaf opex under the stable working condition and the near surge working condition of the compressor. The static pressure model of the compressor leaf opex has a high matching degree with a practical situation, and an autocorrelation error between the static pressure model of the compressor leaf opex and real compressor experimental data can be guaranteed to be less than or equal to 5%.
Description
technical field [0001] The invention relates to a blade tip static pressure model of an axial flow compressor, which belongs to the technical field of compressor modeling and stability control. Background technique [0002] The stability of the compressor is a prerequisite for the stable operation of the aero-engine. Estimating the stability of the compressor and keeping the compressor away from the surge boundary are the basis for ensuring the stable operation of the engine. [0003] For compressor stability estimation, that is, estimation of compressor surge margin, NASA Research Center of the United States once proposed a distortion estimation system (DES) in the engine high stability control (HISTEC) program. Engine inlet parameters estimate compressor stability for design and implementation of Stability Management (SMC). The core of the HISTEC technical solution lies in the stability estimation, that is, the calculation of the compressor surge margin. However, its accu...
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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/367
Inventor 孙丰勇杜瑶缪丽祯郑前刚骆伟张海波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS