Ignition electrode gap adjustable constant-volume combustion device

Abstract

The invention discloses an ignition electrode gap adjustable constant-volume combustion device. The ignition electrode gap adjustable constant-volume combustion device comprises a bullet accommodating main body of a cylindrical structure, wherein the bullet accommodating main body is of a stepped structure with small middle inner diameter and large inner diameters at two ends; a small-inner-diameter cavity in the middle forms a combustion chamber, and large-inner-diameter cavities at two ends form end cover installation grooves; the outer wall of the combustion chamber is provided with accessory installation holes and a pair of electrode installation holes which are communicated with the outer wall of the combustion chamber; the pair of electrode installation holes is of a radial symmetrical arrangement structure, and is internally provided with electrode sleeves fixedly; the electrode sleeves are internally provided with ignition electrodes matched with the electrode sleeves in a threaded mode, so that the gap between a pair of ignition electrode is convenient to adjust; annular end covers are arranged at two ends of the bullet accommodating main body; end cover annular tables are arranged at the inner sides of the annular end covers; the end cover annular tables and the end cover installation grooves are matched in a sealed embedding mode, so that the annular end covers are fixed at two ends of the bullet accommodating main body; inner cavities of the end cover annular tables form glass installation grooves which are internally provided with transparent quartz glass blocks in a sealed embedding mode, so that the combustion situation in the bullet accommodating main body can be observed conveniently.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine combustion, in particular to an ignition electrode gap adjustable constant volume combustion device for studying flame ignition and propagation characteristics. The invention can be used to study the ignition and propagation characteristics of various fuels under different temperatures, pressures, equivalence ratios and ignition energies. Background technique [0002] With the increasingly prominent energy and environmental issues, the requirements for reducing the fuel consumption rate of internal combustion engines and controlling harmful emissions of internal combustion engines are getting higher and higher, so it is very important to strengthen the research on fuel combustion mechanism. [0003] For internal combustion engine researchers, it is important to obtain the premixed laminar combustion characteristics of fuel (including laminar combustion velocity, flame stretch, s...

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Problems solved by technology

[0006] Some existing constant-volume incendiary bombs fix the quartz glass window on the main body of the bomb through the bolts and the flanges at both ends of the main body of the bomb. Generally, the sealing surface of the bomb is sealed by pressing the sealing surface of glass and metal. This will lead to uneven stress on the glass, coupled with the violent expansion of the high-temperature and high-pressure gas in the body, which may cause the glass to break; The two ends of the main body, and then the glass is embedded in the flange. This structure is complicated and inconvenient to install. Moreover, because the flange needs to be arranged with through bolts, the outer diameter of the flange is larger than that of the main body of the bomb, which is not conducive to the arrangement of heating equipment. At the same time, the temperature at both ends of the bomb can not reach the set temperature, especially the temperature of the transparent quartz glass block of the visualization window can not meet the experimental requirements, and it will cause some gas inside the bomb to liquefy on the glass surface, which will cause great damage to the experiment. influences

Another point is that most of the constant volume bombs currently use a fixed ignition electrode design. Although this can be ignited, it is impossible to study the impact of the ignition gap and ignition energy on the combustion process, especially on the initial stage of flame propagation.

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