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Device and method for realizing turbulent flame and shock wave visual constant volume combustion test

A technology of constant volume combustion and test device, which is used in internal combustion engine testing, chemical analysis using combustion, etc., can solve the problem of little research on gas spontaneous combustion and detonation at the end of the interaction between turbulent flame and shock wave, and achieves simple structure and low cost. Effect

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

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Problems solved by technology

However, little research has been done on the interaction of turbulent flames and shock waves, spontaneous combustion of terminal gases, and detonation.

Method used

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  • Device and method for realizing turbulent flame and shock wave visual constant volume combustion test
  • Device and method for realizing turbulent flame and shock wave visual constant volume combustion test
  • Device and method for realizing turbulent flame and shock wave visual constant volume combustion test

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Embodiment

[0050] Such as figure 1 As shown, this embodiment discloses a visual constant volume combustion test device that realizes flame-shock wave interaction, the main combustion device, orifice plate, fuel supply system, heating system, ignition system, high-speed photography system, intake and exhaust system, It is composed of in-cylinder pressure acquisition system and synchronous controller. The light emitted from the light source 100 passes through the slit 102 after being focused by the first focusing lens 101, then passes through the reflection of the first plane mirror 103 and the first concave mirror 104 and irradiates the incendiary bomb body 4, and then passes through the front window and the rear window in turn to leave After burning the projectile 4, the reflection of the second concave mirror 105 and the second plane mirror 106 is tangent to the knife edge 107, and is finally focused by the second focusing lens 108 and irradiated to the camera lens 109.

[0051] Such a...

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Abstract

The invention discloses a device for realizing a turbulent flame and shock wave visual constant volume combustion test. The device comprises a firebomb body, a fuel supply system, a heating system, an igniting system, a high-speed photography system, an air inlet and outlet system, a pressure acquisition system, a synchronous controller and a single-chip microcomputer control system. The device also comprises orifice plates with different amounts of porosity and aperture sizes. In each test, the cross section of the firebomb body is provided with one of the orifice plates through an orifice plate slot. The method utilizes hydrogen as fuel. Through use of the orifice plates with different amounts of porosity and aperture sizes, turbulent flame with different intensities is obtained and visible shock wave is produced. The invention researches interaction of reflection shock wave and flame and interaction-caused influence on pressure fluctuation in a cylinder. The method and device provide theoretical thinking for pressure fluctuation phenomenon in an enclosed space and knocking of a small reinforced gasoline engine. The device and method realize full transparent visualization of the whole combustion chamber and clear and visual shooting of the whole flame development process.

Description

technical field [0001] The invention belongs to the technical field of turbulent combustion and internal combustion engine combustion, and in particular relates to a test device for studying the interaction between turbulent flame and shock wave and the spontaneous combustion of terminal gas induced by shock wave. Induced terminal gas spontaneous combustion and its effect on in-cylinder pressure fluctuations. Background technique [0002] In order to further improve the engine efficiency, economical performance and power performance, it is widely used to realize engine miniaturization and enhancement by supercharging, increasing compression ratio and other means. Engine knocking is the main bottleneck restricting engine small-scale strengthening technology. The knocking will cause the pressure in the engine cylinder to oscillate greatly, reduce the output power and thermal efficiency, greatly reduce the economy and power of the engine, and even damage the engine. [0003] I...

Claims

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Application Information

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IPC IPC(8): G01N31/12G01M15/04
CPCG01M15/04G01N31/12
Inventor 卫海桥赵健福高东志周磊李楠
Owner TIANJIN UNIV
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