A system and method for simultaneously measuring spray macroscopic morphology and microscopic characteristics

Abstract

The invention discloses a system and method for synchronously measuring spraying macromorphology and microscope properties. The system comprises a constant-volume combustion device, a fuel supply system, an LED (light emitting diode) lamp, a high-speed camera, a digital delay generator and a phase Doppler particle analyzer, wherein the fuel supply system is provided with a controller; the constant-volume combustion device consists of a box body and a combustion projectile body; the combustion projectile body is provided with four observation holes in the shape like a through hole; the axial lines of the observation holes are on the same horizontal plane; the angle between the axial lines of the two observation holes is 180 degrees; the included angle between the axial lines of the other two observation holes is 160 degrees; an optical observation window is arranged in each observation hole; the constant-volume combustion device is communicated with the fuel supply system; the controller is connected with the digital delay generator; the digital delay generator is connected with the phase Doppler particle analyzer and the high-speed camera. By the measuring method using the measuring system, the goal of synchronously measuring the spraying macromorphology and the microscope properties in the constant-volume combustion device is realized.

Description

technical field [0001] The invention relates to the field of constant-volume combustion devices, and more specifically, relates to a system and method for synchronously measuring the macroscopic appearance and microscopic characteristics of a spray. Background technique [0002] In the field of internal combustion engines, the atomization process of fuel directly affects the combustion and emission performance, thereby contributing to the alleviation of energy and environmental problems. Therefore, for internal combustion engine researchers, it is necessary to obtain fuel spray characteristics (jet breakage length, spray cone angle, oil droplet size and velocity, etc.) and its relationship with surrounding environmental parameters (pressure, temperature, ambient gas type and density, etc.) , and then establish the kinetic mechanism of fuel atomization reaction, and finally provide basic data for engine spray simulation and optimization, which is the main purpose of fuel inje...

AI Technical Summary

Problems solved by technology

[0004] Some existing spray characteristic measurement systems and methods can only measure the macroscopic or microscopic characteristics of the spray in an open space, or can only measure the macroscopic shape of the spray in a constant volume combustion device, and cannot cooperate with advanced optical measuring instruments. Measurement of microscopic characteristics (including particle size distribution information and velocity distribution information of spray particles), let alone simultaneous measurement of spray macroscopic morphology and microscopic characteristics in a constant volume combustion device

Therefore, such systems and methods are far from meeting the requirements of the test

This limitation severely hinders the study of the broken atomization depth of fuel

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