A cylinder head and method for visualizing flow field in a large diesel engine

Abstract

The invention discloses a cylinder head and a method for visualizing the flow field in a cylinder of a large diesel engine. The cylinder head has an annular inner edge; a plurality of pairs of through holes are arranged radially and symmetrically on the peripheral wall of the annular inner edge, and one of the through holes A laser light source is installed. The laser light source is used to collect the information of the in-cylinder flow field during the fuel injection process. A CCD image sensor is installed in the through hole opposite to the laser light source. The CCD image sensor is used to receive the in-cylinder flow information sent by the laser light source. flow field information, and transmit the information to an external CCD image processing device for processing; on the opposite side where the laser light source is placed, one or two (or more) through holes with different angles can be arbitrarily selected to place the CCD image sensor, so that the CCD image sensor can be placed from The flow field in the cylinder can be observed from multiple angles to improve the accuracy of the analysis. For other through-holes that are not used temporarily, seal and fill them with metal plugging parts to prevent impact on fuel combustion.

Description

technical field [0001] The invention relates to the observation of the flow field in the cylinder of a diesel engine, in particular to a cylinder head and a method for visualizing the flow field in the cylinder of a large diesel engine. Background technique [0002] In recent years, diesel engines have been widely used due to their high power and high efficiency, especially in the field of nautical ships, and have made great contributions to the development of human society and the progress of navigation. During the working process of the diesel engine, the fuel is actually sprayed and diffused in the combustion chamber to generate power. The atomization process of fuel depends not only on the interaction between the gas outside the injection hole and the oil beam, but also on the condition of the flow field in the cylinder and the flow state of the fuel in the injection hole. During the fuel atomization combustion process, due to the influence of many factors, it has varia...

AI Technical Summary

Problems solved by technology

For the diesel engine experiment platform, the optical engine is usually modified or a constant volume incendiary bomb is used to conduct experiments in combination with the optical path system and data acquisition and control system. For the optical engine modification, an extended body is usually added between the body and the cylinder head And the extended piston, a transparent window as large as possible is designed on the upper part of the extended piston, so as to observe the fuel spray, mixing, ignition and combustion process. This modification method is obviously not easy to realize for large diesel engines

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