Northwestern Polytechnical University

Ning Ge

Limin Gao

Lei Wang

Bo Ouyang

Xiangfu Lei

Heng Jiang

Guanhua Yang

Tianyu Gao

The disclosure discloses a global pressure acquisition system for a rotating model, including a CCD camera, a signal generator, a stroboscopic pulse LED light source, a photoelectric sensor, a preset counter, and a controller. The disclosure further discloses a global pressure acquisition method for a rotating model. The disclosure has the beneficial effects that, by using the non-contact measuring method disclosed by the present disclosure, a measured model and a flow field are not damaged, a submillimeter-level spatial resolution is achieved, it is ensured that the acquired PSP image of the rotating model is clear, and the signal to noise ratio of the image is increased.

Global pressure acquisition system and method for rotating model

The disclosure discloses a measuring device for dynamic characteristics of pressure sensitive paint, including a PSP sample wafer, a dynamic pressure sensor, an oscilloscope, a light source, a photomultiplier tube, a bandpass filter, a loudspeaker, a power amplifier, and a signal generator. The disclosure further discloses a measuring method for dynamic characteristics of pressure sensitive paint. The disclosure has the following beneficial effects: by using the measuring device disclosed by the present disclosure, the continuous sinusoidal pressure wave with any frequency can be generated, and has the frequency precision that does not exceed 0.01 Hz, an optical path is not shielded, high stability is achieved, and the amplitude and phase characteristics of the pressure frequency of the PSP can be precisely captured.

Measuring device and method for dynamic characteristics of pressure sensitive paint

Surface pressure measurements on rotating models are important for flow phenomenon identification, understanding flow mechanisms and model aerodynamic design. The disclosure discloses a periodic pressure field measurement system based on the superposed lifetime of pressure sensitive paint, including pressure sensitive paint, a pulse light source, a camera, a synchronizer and a computer. A lifetime superposition method is disclosed in the disclosure for measuring periodic pressure fields of pressure sensitive paint. The disclosure has the beneficial effects: the disclosure acquires, on the basis of a relationship between the fluorescence lifetime of the pressure sensitive paint and the pressure, fluorescence image pair sequence of the pressure sensitive paint with a high signal to noise ratio under a high-frequency pulsating pressure through the strobe light source and the low-frame-rate CCD camera, and obtains the global dynamic pressure distribution according to the measurement principle of the lifetime method, which can effectively reduce system errors.

Periodic pressure field measurement system and method based on superposed lifetime of pressure sensitive paint

A dual-purpose calibration system for an optical pressure sensitive paint considering static and sinusoidal pressure changes, and a calibration method, in which a dual-purpose calibration tube is used in common, are provided. In the dual-purpose calibration system, a dynamic adapter and a static adapter are replaced with each other to achieve switching between dynamic calibration and static calibration, so that two calibration methods, one static and the other dynamic, can be implemented by the dual-purpose calibration system. The switching between the dynamic calibration and the static calibration includes changing between the dynamic adapter and static adapter, and setting a sound source corresponding to the dynamic adapter or setting a gas source corresponding to the static adapter.

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Shaanxi, China

Ning Ge