A Constant Volume Projectile Used in Diesel Spray and Combustion Visualization Test

Abstract

The invention provides a constant volume bomb for a diesel spraying and burning visualization experiment. The constant volume bomb comprises a constant volume bomb body. The constant volume bomb body uses the circular-cake-shaped structure, the interior is hollow and used for forming the visualization experiment area, two sides of the circular cake are opened with visualization window holes and the end faces of the windows are pressed by sealing cover plates for sealing. The quartz glass is clamped between the body and the sealing cover plates. The upper end face is opened with a positioning hole for an oil sprayer installing base, and the unique design is suitable for use of various oil sprayers. The lower end face is opened with a positioning threaded hole for fixing the position of the constant volume bomb. The constant volume bomb body is radially opened with various installing through holes for installing various data collecting devices. The visualization spraying constant volume napalm bomb has the characteristics of simple structure, wide experiment area and transparent light path, and is capable of observing and measuring the spraying and burning processes through cooperating the schlieren method and the laser-induced fluorescence technology, remarkably improving the experiment efficiency, performing the spraying feature test to different oil sprayers and improving the adaptability of the spraying constant volume test bomb.

Description

technical field [0001] The invention relates to a constant-volume projectile used for diesel spray and combustion visualization tests, and belongs to the technical field of internal combustion engines. Background technique [0002] Various thermal parameters (pressure, temperature, ignition parameters) of the diesel engine have a significant impact on the combustion process of the diesel engine. Simulating the combustion performance of diesel engines under various conditions is of great significance for the development of engine combustion systems. The constant volume bomb is an engine combustion simulation experimental device, which can efficiently simulate the temperature and pressure of the diesel engine at each crank angle and the combustion situation in the combustion chamber, and can accurately control a variety of thermodynamic parameters to quantitatively study the impact of each parameter on the spray characteristics of the engine injector. Impact. [0003] As the...

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Problems solved by technology

Chinese patent CN 101943097 A discloses a constant-volume projectile for spray testing, which has openings in the circumferential direction of the projectile, and each opening position is fixed with a piece of quartz glass by a quartz flange, and the upper cover of the projectile body, the lower cover of the projectile body and the projectile body pass through bolts Connected together, the circumferential opening of this invention can flexibly arrange the test optical path and has universal applicability, but the shape of the test cavity inside the constant volume bomb is irregular, which cannot meet the requirements of the test for heat dissipation calculation

Chinese patent CN 103926196 A discloses a spherical multifunctional constant volume bomb, which is shaped like a sphere and has more than two visualization windows. It is more difficult to meet the high pressure requirements of the experiment

Deng Peng and others from Huazhong University of Science and Technology published a constant volume incendiary bomb in the article "Research and Development of a Premixed Combustion Heating Type Constant Volume Incendiary Bomb". Based on its size, sensors, spark plugs, intake and exhaust The holes are all arranged on 8 corners, which makes the structure more compact, and the positions of various instruments and equipment are fixed, which is not suitable for this experiment and does not meet the requirements of this experiment for the flexible arrangement of various instruments and equipment. Our requirements for high-pressure, large-volume spray simulation experiments of marine diesel engines

Yao Chunde of Tianjin University and others published a constant-volume incendiary bomb in the article "A Test Device for Researching Diesel-Methanol Dual-Fuel Constant-Volume Incendiary Bomb". , the requirements of large oil spray simulation experiments

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