Visual test device for liquid drop collision high-temperature wall surface and heating system thereof

Abstract

The invention discloses a visual test device for a liquid drop collision high-temperature wall surface. The visual test device comprises a liquid drop injection system, a glass wall surface and a visual system. The device further comprises a heating system. The heating heat source of the heating system is annular. The annular heating heat source is in contact with a glass wall surface. The glass wall surface area of the annular heating heat source is adopted as a liquid drop test area on the wall surface. Matched with a circumferential distribution type light source, the visual system can be used for shooting the liquid drop wall collision test process from the bottom of the glass wall surface or at any angle of the upper part of the glass wall surface. The invention further discloses a heating system applied to the above test device. The visual test device provided by the invention adopts the novel glass wall surface heating method, so that the change of liquid drops during the wall collision process at different temperatures can be clearly observed. The phenomenon of liquid drop wall collision can be better and more comprehensively studied.

Description

technical field [0001] The invention relates to a visual testing device and a heating system for liquid droplets colliding with a high-temperature wall. Background technique [0002] For in-cylinder direct injection engines, with the development of small structure, high supercharging and high injection pressure, the fuel is easy to hit and adhere to the cylinder wall and piston wall to form a wall oil film due to the limited evaporation time, etc. Cause real fuel loss and reduce engine economy. At the same time, because the oil film evaporation in the cycle is very small, it will also affect the formation of the mixture gas in the subsequent working cycle of the engine. With the continuous accumulation of the wall oil film, a fuel-rich area will be formed locally, resulting in a significant increase in the emission of soot particles and the formation of carbon deposits. Carbon deposits are equivalent to hot spots one by one. When the temperature in the cylinder is high, it...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no liquid collision solution that can combine the advantages of metal walls and glass walls, and can clearly observe the droplet shape changes during the collision process at different temperatures, thus helping to better study the phenomenon of droplet collision

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