A device and method for simultaneously measuring diesel fuel spray structure and combustion characteristics

Abstract

The invention belongs to the diesel spray and combustion visualization research field and discloses a measurement apparatus capable of simultaneously measuring a diesel spray structure and a combustion characteristic based on a laser diagnosis technology and a method thereof. In the past, test researches of a diesel spray characteristic and the combustion characteristic can not be performed simultaneously. In the invention, through using a Mie scattering technology of a laser and a laser induced fluorescence technology (OH-PLIF), the spray structure and the combustion characteristic during diesel combustion can be simultaneously measured and researched. The corresponding apparatus comprises a laser system, a constant volume combustion bomb system, a fuel oil supply system, a signal synchronization system and a signal acquisition system. The test apparatus can simultaneously carry out test researches of a liquid phase length of diesel spray and OH-PLIF distribution under a combustion condition, simultaneously can indicate a liquid phase area in a diesel combustion OH-PLIF distribution map and solves an interference problem of a liquid phase signal to a laser-induced fluorescence signal.

Description

technical field [0001] The invention belongs to the research field of diesel spray and combustion visualization, and especially refers to the use of laser Mie scattering technology to measure the spray liquid phase in the case of combustion, and the use of laser-induced fluorescence technology (OH-PLIF) to realize OH-PLIF during diesel combustion Experimental device and method for simultaneous measurement of distributions. Background technique [0002] In order to protect the environment and facilitate people's lives, the spray, combustion and emission characteristics of internal combustion engines continue to receive the attention of researchers. Spray combustion is an important link in the working cycle of internal combustion engines. Spraying and combustion is also one of the most complex processes in contemporary direct injection diesel engines. In order to study the spray combustion characteristics of the internal combustion engine, improve the performance of the inte...

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Problems solved by technology

The researchers used the laser Mie scattering technology with a wavelength of 532nm to study the characteristics of diesel spray and the laser-induced OH fluorescence (OH-PLIF) technology to study the OH distribution of diesel spray combustion, but under the combustion conditions due to The brightness of the glow generated when the flame burns is too strong, which will interfere with the Mie scattering signal of the laser, resulting in indistinguishability between the liquid phase distribution and the flame distribution during combustion. The interference of the distribution measurement also causes the interference signal of the liquid phase in the distribution of the OH-PLIF signal

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