Measuring system for pressure response time of pressure-sensitive paint and temperature response time of temperature-sensitive paint

A technology of pressure-sensitive coatings and response time, applied in material excitation analysis, fluorescence/phosphorescence, etc., can solve the problem that slow pressure-sensitive coatings can only be applied

Inactive Publication Date: 2013-04-03
AVIC SHENYANG AERODYNAMICS RES INST
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AI Technical Summary

Problems solved by technology

Pressure-sensitive coatings that respond slowly to pressure changes can only be applied to pressure measurement tests in a steady state, and temperature-sensitive coatings that respond slowly to temperature changes can only be used in temperature measurement tests in a steady state. Under unste

Method used

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  • Measuring system for pressure response time of pressure-sensitive paint and temperature response time of temperature-sensitive paint
  • Measuring system for pressure response time of pressure-sensitive paint and temperature response time of temperature-sensitive paint
  • Measuring system for pressure response time of pressure-sensitive paint and temperature response time of temperature-sensitive paint

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Embodiment Construction

[0035] Pressure-sensitive paint pressure response time and temperature-sensitive paint temperature response time measurement system, including fixed workbench 8, sliding workbench 7, shock wave tube 1 for generating shock wave, shock tube test wall plate 2 for spraying pressure-sensitive paint 3. Dynamic pressure sensor used to monitor the shock wave sweeping through the shock tube test area 3. LED light source used to generate excitation light 4. Photomultiplier tube used to collect pressure-sensitive paint fluorescence intensity signals 5. As the shock tube optical test window Quartz optical glass windows6. The sliding table 7 is slidably connected to the fixed table 8, the shock tube 1 is fixedly connected to the sliding table 7 with the shock tube driving section 9, and the shock tube test section is placed on the fixed table 8, and the quartz optical glass The window 6 is arranged on the shock tube 1, and the quartz optical glass window is the optical channel of the measu...

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Abstract

The invention discloses a measuring system for pressure response time of a pressure-sensitive paint and temperature response time of a temperature-sensitive paint. The measuring device comprises a shock tube, a shock tube test wall plate, a dynamic pressure sensor, an LED (light-emitting diode) light source, a photomultiplier and an optic quartz glass window. The measuring method comprises the following steps: adjusting the LED light source and the photomultiplier, pressurizing the high-pressure section of the shock tube by the photomultiplier to the default pressure; analyzing the time that shock wave S arrives at the test location, which is recorded by the dynamic pressure sensor; analyzing the tested paint fluorescence intensity data curve recorded by the photomultiplier; determining the time that the shock wave S sweeps through the paint fluorescence intensity and achieves 90% of the standing state, and obtaining the pressure/temperature response time of the tested paint. The measuring device is simple and reliable, and can be used for determining the pressure/temperature-sensitive paint response time which is smaller than ms magnitude.

Description

technical field [0001] The invention relates to a wind tunnel test pressure-sensitive coating / temperature-sensitive coating performance measurement technology, in particular to a shock wave method pressure-sensitive coating pressure response time / temperature-sensitive coating temperature response time measuring device and method. Background technique [0002] Wind tunnel pressure-sensitive paint test technology is a new type of wind tunnel test technology developed in the 1980s. It uses the fluorescence quenching effect of oxygen molecules on probe molecules (active components in pressure-sensitive paints) The lifetime or intensity of the fluorescence emitted by the excited probe molecules is used to obtain the local environmental pressure. Because it is a "non-intrusive" wind tunnel test technology, it has little disturbance to the flow field, short test period, significant economic benefits and wide application, so it has received extensive attention. [0003] The tempera...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 尚金奎马晓光衷洪杰赵民王鹏孙鹏飞
Owner AVIC SHENYANG AERODYNAMICS RES INST
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