Porous simple-component fast-response pressure-sensitive coating formula and preparation method

Abstract

The invention belongs to a pressure testing technique, and particularly relates to a porous simple-component fast-response pressure-sensitive coating and a preparation method of the coating. The porous simple-component fast-response pressure-sensitive coating comprises an active layer coating and a shielding layer coating, wherein the active layer coating is prepared from a pressure-sensitive probe and an organic solvent at a certain ratio; and the shielding layer coating is prepared by mixing a macromolecular adhesive, a filler and a solvent at a certain ratio. In a using process, the shielding layer coating is sprayed and then the active layer coating is sprayed on the shielding layer coating to obtain the porous simple-component fast-response pressure-sensitive coating. The porous simple-component fast-response pressure-sensitive coating obtained by specific proportioning is applicable to a dynamic pressure measurement test on high- and low-speed wind tunnels with measurement frequency not greater than 20kHz (or under other high- and low-speed operating conditions), fills in a gap of a domestic fast-response pressure-sensitive coating, is simple, convenient and quick in proportioning and low in cost, and has a larger practical application value.

Description

technical field [0001] The invention belongs to pressure measurement technology, in particular to a formula of porous single-component fast-response pressure-sensitive paint and a preparation method thereof. Background technique [0002] In the wind tunnel test technology, the pressure measurement of the pressure hole is a conventional pressure measurement technology, but this pressure measurement technology cannot obtain high-resolution continuous model surface friction distribution information, and the traditional dynamic pressure measurement technology can only Relying on dynamic pressure sensors, such sensors are expensive, difficult to install, and inconvenient to operate, which is very unfavorable for aerodynamic researchers to analyze the aerodynamic state of the model. [0003] By analyzing the pressure distribution on the surface of the model, aerodynamic researchers can gain an in-depth understanding of the nature and mechanism of flow phenomena, determine where th...

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Problems solved by technology

[0005] However, the cost of existing pressure-sensitive coatings is high, and it is difficult to obtain through public channels, especially its formula is more difficult to determine, which cannot meet the gradually expanding demand for pressure-sensitive coatings in China.