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Stator blade pressure pulsation measuring device

A pressure pulsation, measurement device technology, applied in the measurement of properties of piezoelectric devices, components of pumping devices for elastic fluids, machines/engines, etc. The number of problems is limited, and the effect of high spatial resolution, small flow field influence, and easy installation is achieved.

Inactive Publication Date: 2020-08-25
AECC SHENYANG ENGINE RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the measurement technology based on pressure sensors is used. However, the installation of dynamic pressure sensors such as Kulite needs to destroy the blade structure, which will affect the actual distribution of the flow field, and is limited by space, resulting in the arrangement of sensors. The number is very limited, making it ineffective for describing the pressure field across the blade

Method used

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  • Stator blade pressure pulsation measuring device
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  • Stator blade pressure pulsation measuring device

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Embodiment Construction

[0033] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment 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 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 embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...

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Abstract

The invention belongs to the technical field of aviation fanjet blower noise measurement, and particularly relates to a stator blade pressure pulsation measuring device. The stator blade pressure pulsation measuring device comprises a blade base, PVDF piezoelectric film sensors, a testing lead and a data collector. The blade base is provided with an upper flanged plate, a lower flanged plate and ablade. A thinned area is arranged on a blade basin and / or a blade back of the blade, and a lead groove is formed in the upper flanged plate. The PVDF piezoelectric film sensor is laid in the thinnedarea. One end of the testing lead penetrates through the lead groove to be connected with the PVDF piezoelectric film sensor on the corresponding side, and the data collector is connected to the otherend of the testing lead through a charge amplifier or a current amplifier. According to the stator blade pressure pulsation measuring device, the blade is easy to mount, the spatial resolution is higher, the influence on the flow field is small, and the array covering area and the number of the sensors capable of being arranged in the space are both superior to an existing measuring system.

Description

technical field [0001] The application belongs to the technical field of fan noise measurement of aviation turbofan engines, and in particular relates to a pressure pulsation measurement device for stator blades. Background technique [0002] Modern aviation turbofan engines with high bypass ratio are generally composed of fans, supercharging stages, high-pressure compressors, combustion chambers, high-pressure turbines, and low-pressure turbines. Fan noise has become one of the main noise sources of civil aircraft, and static interference noise is also is the main component of fan noise. [0003] The main source of rotor / stator interference noise is the unsteady pressure pulsation generated by the wake impacting the stator blades when the rotor rotates. Through the pressure pulsation on the blade surface, clarifying the coupling relationship between the rotor / stator interference noise is of great significance for improving fan noise. Although the unsteady pressure fluctuat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/54F04D27/00F04D29/64G01L1/16
CPCF04D27/001F04D29/544F04D29/646F05D2220/36G01L1/16
Inventor 白志刚印雪梅张岩蒋永松郑文涛
Owner AECC SHENYANG ENGINE RES INST
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