A Visual Experimental Device for Boiling in the Nose Bridge Area of ​​Internal Combustion Engine Cylinder Head

Abstract

The invention provides a visible boiling experiment device for a ridge area of a cylinder cover of an internal combustion engine. The device comprises a constant-temperature water batch box tank, an electric water pump, a flow meter, an internal combustion engine body cylinder cover assembly, a controllable heater, a high-speed endoscope shooting device, and image acquiring system and computer; an input pipeline and an output pipeline are connected between the constant-temperature water bath tank and the internal combustion engine body cylinder cover assembly; the electric water pump and the flow meter are sequentially arranged on the input pipeline; a first flow control valve is arranged between the constant-temperature water bath tank and the electric water pump; the internal combustion engine body cylinder cover assembly comprises a simulating machine body and a cylinder cover; the controllable heater is in close contact with a thermal surface of a bottom plate of the cylinder cover; a through hole is formed close to the ridge area of the cylinder cover; the high-speed endoscope shooting device which is in sealing fit with the through hole is connected with the image acquiring system and computer. With the adoption of the visible boiling experiment device, the heat transfer in boiling of the ridge area of the cylinder cover of the internal combustion engine is visible, and therefore, the basis is provided to build a boiling heat transfer theoretical model and improve the structure of a cooling water cavity.

Description

technical field [0001] The invention relates to a boiling visualization experiment device in the nose bridge area of ​​an internal combustion engine cylinder head, and belongs to the technical field of boiling phase change enhanced heat transfer in an internal combustion engine cooling system. Background technique [0002] The transfer process of "heat" and "mass" in the cooling system of the internal combustion engine directly affects the heat distribution and energy utilization of the internal combustion engine. At the same time, it serves as the boundary basis of the combustion hot atmosphere and is an element of timely regulation of combustion and emissions. Therefore, the flow and heat transfer behavior in the cooling system is one of the key elements for energy saving and emission reduction of internal combustion engines. In order to meet the realistic desire of "high efficiency, energy saving and ultra-low emission", a large number of advanced technologies such as mul...

AI Technical Summary

Problems solved by technology

At present, most of the experimental devices used to study boiling heat transfer in internal combustion engines measure physical quantities such as temperature, heat flux density, and pressure. The kinetic characteristics of boiling bubble size, motion, nucleation density, detachment frequency, and boiling state lead to simplification and too many assumptions in existing theories and models. The parameter determination in the model is too far-fetched and the applicable range is narrow, which greatly restrict Research and Application of Boiling Heat Transfer in Internal Combustion Engine Cooling System

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