Engine cylinder cover water chamber flow field visualization test method

Abstract

The invention relates to an engine cylinder cover water chamber flow field visualization test method, which comprises the following steps of: preparing an engine cylinder cover test model; arranging an observation window in a flowing area on a cylinder cover; arranging a metal wire and a diode illuminating lamp which are insulated from the metallic cylinder cover at the upstream of a flow field area; running a water circulating system, discharging impurities in the water circulating system, running a water pump and adjusting flow to 0.5m/s to 1m/s; turning on a switch of a direct-current power supply with voltage being 10 to 100V and current being 0 to 1A, electrifying the metal wire to electrolyze water to generate hydrogen bubbles on the metal wire which is connected with the cathode by taking the metal wire as a cathode and the cylinder cover as an anode, and using the hydrogen bubbles as trace particles to flow and rotate with water; and illuminating the internal part of the cylinder cover by using the diode illuminating lamp, using a camera with a microspur function to capture the trace particles and recording the trajectory of the hydrogen bubbles generated by electrolyzed water in the flow field to obtain the motion trajectory of water molecules in the flow field of the cylinder cover. The engine cylinder cover water chamber flow field visualization test method has the advantages that the flowing situation of cooling water in the water chamber of the engine cylinder cover can be intuitively judged and the flowing dead zone in the water chamber of the cylinder cover is eliminated.

Description

technical field [0001] The invention belongs to a flow field display test method, in particular to a flow field display test method of an engine cylinder head water cavity. Background technique [0002] The engine cylinder head is an important part of the engine. It is used to close the top of the cylinder and form the combustion chamber. It supports the camshaft, the rocker shaft and the intake and exhaust valves to form the intake and exhaust passages. When the air is sucked into the cylinder, the spark plug ignites the combustible mixed gas, drives the piston to do work, and finally the exhaust gas after combustion is discharged from the exhaust pipe through the exhaust valve and the exhaust port. As a complex part, the cylinder head has complex processing methods, especially for the structure of the water cavity inside the cylinder head, which is difficult to observe and display, which brings great technical difficulties to the heat transfer research of the cylinder head...

AI Technical Summary

Problems solved by technology

As a complex part, the cylinder head has complicated processing methods, especially the structure of the water cavity inside the cylinder head