Shadow imaging system for multi-spraying-hole spraying measurement

Abstract

The invention belongs to the field of visualized measurement based on shadow-method imaging and in particular relates to a shadow imaging system for multi-spraying-hole spraying measurement. According to the shadow imaging system for the multi-spraying-hole spraying measurement, light penetrates through a semi-reflecting and semi-transmitting mirror and is irradiated into a combustion chamber; the light is reflected by the semi-reflecting and semi-transmitting mirror and is irradiated to a focusing mirror in a direction vertical to an original direction; the light is gathered through the focusing mirror and is reflected through a second plane mirror and then finally enters a high-speed photographic camera; an image file is stored in a computer. A multi-spraying-hole oil spraying device is mounted on a wall surface at the opposite side of a visualized window and mirror-surface treatment is carried out on the wall surface, which is provided with the oil spraying device, of the combustion chamber; direction selectivity of light transmission of the semi-reflecting and semi-transmitting mirror is combined and the semi-reflecting and semi-transmitting mirror is placed in a manner of forming an angle of 45 degrees with a horizontal direction, so that a plurality of beams of sprayed mist, which are sprayed by the oil spraying device, are observed from a front surface, and furthermore, the shadow imaging system can be applied to the multi-spraying-hole oil spraying device and the aim of observing multi-spraying-hole oil spraying at the same time is realized.

Description

technical field

[0001] The invention belongs to the field of visualization measurement based on shadow method imaging, in particular to a shadow imaging system for multi-nozzle spray measurement. Background technique

[0002] The characteristics of diesel engine spray have an important impact on the economy and emissions of diesel engines, so the research on diesel engine spray is a very active field in the research of diesel engine combustion. As a traditional optical test method for spray penetration and spray cone angle, the existing shadow test system has two common optical path arrangements: reflective and transmissive. In the transmissive optical path system, the light source, lens, combustion chamber, and high-speed camera are on the same straight line, and the light emitted from the light source becomes parallel light after passing through the collimating lens, passes through the measured flow field, and then enters through the focusing lens. High speed camera. In ...

Images