Engine in-cylinder space and near-wall surface visualization air passage steady flow experiment table and experiment method

Abstract

The invention discloses an engine in-cylinder space and near-wall surface visualization air passage steady flow experiment table and an experiment method, which belong to the technical field of air inlet passage testing of automobile engines. A cylinder A and a cylinder B which are completely the same are arranged on an air flow pressure stabilizing box of the experiment table to test a steady flow field in an engine cylinder; visualization of the air cylinder is achieved through the arrangement of the transparent cylinder sleeve, and in the air cylinder B, by means of the characteristic thatsoft silk threads arranged in the transparent cylinder sleeve present different swing forms in an air inlet flow field, the air inlet flow field in the cylinder is tested in combination with the principle that two-dimensional shot pictures of a camera are synthesized into a three-dimensional space graph. And in the cylinder A, an impeller anemograph kit composed of multiple layers of impellers andcorresponding tachometers is used for measuring the vortex ratio of each height in the cylinder. Compared with the prior art, the experiment table provided by the invention has the advantages of simple overall structure, low technical requirements on each test device, low cost for constructing the experiment table, simple test process, the requirement for specialty of testers is not high, the feedback speed of test results is high, and the optimization design of the airway structure can be achieved within a short period.

Description

technical field [0001] The invention relates to the technical field of engine intake passage testing, in particular to a visual airway steady flow experiment platform and an experiment method for the space in the engine cylinder and near the wall surface. Background technique [0002] During the working process of the vehicle engine, it needs to consume fuel and inhale air, and the movement form of the air entering the cylinder and combustion chamber through the engine intake port has a great impact on the flow field in the cylinder, and will directly affect the flow field in the cylinder. Combustion characteristics, and then affect the power and economy of the engine. Therefore, it is necessary to conduct targeted research on the intake motion characteristics of the engine intake port. According to the difference in the use and performance of the car, the structure of the engine intake port of the vehicle on the existing market is also designed in a variety of ways. From t...

AI Technical Summary

Problems solved by technology

Most of these test methods can only reflect the two-dimensional static image of the flow field in the cylinder, and cannot provide more detailed flow field information; while the 3D-PIV system can obtain the three-dimensional flow field velocity slice of the air flow in the cylinder, but the test method The cost of the test is expensive, the operation is complicated, and the data processing is cumbersome, which greatly limits its application range.

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