Liquid-drop wall-impingement experimental device capable of correcting drop point drift

Abstract

The invention discloses a liquid-drop wall-impingement experimental device capable of correcting drop point drift, belongs to the technical field of liquid-drop wall-impingement experiment. The devicecomprises a gas path module, a gas flow acceleration control module, a windproof long pipe, a sliding guide rail, a supporting platform and a liquid-drop generation module; the gas path module is used for providing gas for driving the liquid-drop to accelerate and fall; the liquid-drop generation module is used for repeatedly generating a single liquid-drop; the gas flow acceleration control module is used for guiding gas flow of gas provided by the gas path module, eliminating turbulence, generating laminar flow and performing acceleration process on the liquid-drop through the laminar flow,so that the liquid-drop accelerates and fall and dripped on a testing plane; and the windproof long pipe is mounted on the sliding guide rail and is in a vertical state, wherein a gap is reserved between the bottom portion thereof and the testing plane and the top portion thereof is directly opposite to the liquid-drop outlet end of the gas flow acceleration control module. According to the liquid-drop wall-impingement experimental device, the drop point of the liquid-drop can be completely locked by adding a windproof long pipe with the inner diameter larger than the liquid-drop, thereby effectively solving the problem of drift of the liquid-drop caused by external air.

Description

technical field [0001] The invention belongs to the technical field of droplet collision experiments, and in particular relates to a droplet collision experiment device capable of correcting drop point drift. Background technique [0002] As the degree of strengthening of the engine continues to increase, an abnormal combustion phenomenon called "super knock" appears under low-speed and heavy-load conditions. The peak pressure in the cylinder can exceed 30MPa, and the pressure shock amplitude can exceed 20MPa. It is extremely destructive and can cause spark plug fracture, valve fusing or piston ablation. Pre-ignition refers to the phenomenon of ignition that occurs before spark ignition, and there is a close relationship between pre-ignition and superknock. Pre-ignition must have occurred before super-knock, and pre-ignition is a necessary but not sufficient condition for super-knock to occur. Therefore, an important way to suppress super knock is to prevent early combusti...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a liquid drop collision test device that can correct the drift of the drop point. By adding a long windproof tube with an inner diameter larger than the droplet, the drop point of the droplet can be completely locked, effectively solving the external problem. The problem of air-induced drift of droplets

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