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Engine cylinder's inner near-wall flow field testing device

An engine cylinder and testing device technology, which is applied in the direction of measuring device, machine/structural component testing, internal combustion engine testing, etc., can solve the problems of difficult to obtain the flow field in the blind zone in the cylinder and the small area of ​​the piston top window, and achieves compact structure and operation. simple effect

Active Publication Date: 2017-02-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a test device for the flow field near the wall in the engine cylinder to solve the problem that the flow field in the blind area in the cylinder is difficult to obtain due to the small window area of ​​the piston top

Method used

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  • Engine cylinder's inner near-wall flow field testing device
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  • Engine cylinder's inner near-wall flow field testing device

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Embodiment Construction

[0011] The principle and structure of the device of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0012] The test device for the flow field near the wall in the engine cylinder is composed of: the quartz glass cylinder liner 2 is sequentially assembled with the piston top cover plate 3, the extended piston 4, and the reflector 5, and the quartz glass cylinder liner is equipped with a laser device 1 respectively. With optical camera 6, reflector support 7 is installed on the surface of bottom plate of extension body 8 and stretches in the extension piston. The bolt 9 passes through the screw hole on the back of the swivel frame 10 and is connected with the reflector support shaft, the reflector is mounted on the swivel frame, and the angle of the reflector can be adjusted freely within the range of -45° to +45°. The top of the extended piston has a window hole 4-1 and is provided with a stop 4-2, and quartz g...

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Abstract

The invention discloses an engine cylinder's inner near-wall flow field testing device. According to the invention, the reflector support is installed on the surface of the lower plate of a lengthened body and extends to the inner part of a lengthened piston. The rotation support is connected to the shaft of the deflector support; the reflector is mounted on the rotation support, and the angle of the reflector can be freely adjusted in the range of from minus 45 degrees to positive 45 degrees. The top part of the lengthened piston is provided with a glass window. The lengthened piston is fixedly connected with the top cover plate of the piston. The reflector receives the information of the cylinder's inner flow field through the visible window. According to the invention, the problem is resolved that the information of the cylinder's near-wall flow on its cross section is difficult to obtain as the visible window at the top part of the piston is usually small due to the restriction of a mechanical structure. Through the control of a laser source to cooperate with the reflector angle, the optical photographing area can be expanded to the cylinder's inner near-wall; and through the control of angle over the positioning of a ruler, it is possible to accurately control the rotation angle of the reflector and to adjust the angle in real time. The testing device, in need of no other external aiding devices, is compact in structure and is simple to operate.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to a testing device for a flow field in an engine cylinder. Background technique [0002] In the combustion analysis experiment of the engine cylinder, the traditional intrusive measurement method will interfere with the flow field in the cylinder, and is also limited in terms of temporal and spatial resolution. Since the 1970s, on the visual engine experiment platform, optical diagnostic technology has been gradually applied to the research of engine cylinder flow, mixture formation and combustion. The visual monitoring of the engine is achieved through the use of quartz glass cylinder liners and the installation of quartz windows on the top of the piston. Through the quartz glass cylinder liner and a window on the top of the extended piston, the flow and combustion conditions at different horizontal cross-sectional positions in the cylinder can be directly obse...

Claims

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Application Information

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IPC IPC(8): G01M9/00G01M15/04
CPCG01M9/00G01M15/04
Inventor 王天友孙彦哲孙凯
Owner TIANJIN UNIV
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