Spherical multifunctional constant volume bomb

Abstract

The invention discloses a spherical multifunctional constant volume bomb. The spherical multifunctional constant volume bomb comprises a body with a spherical shape and more than two window holes in the spherical body, wherein the axes of the window holes are intersected at the sphere center of the body; the area close to the sphere center is a hollow test area; a through hole pointing to the test area is reserved between the window holes. The spherical multifunctional constant volume bomb is simple in structure, convenient to machine, compact in structure and light in bomb body weight, and can bear high strength; the temperature field of the test area is uniform; all sealing pieces of a volume bomb adopt non-cooling sealing; the internal temperature and the pressure are easily controlled; continuous test at a high temperature and a high temperature can be realized; an optical system and an injector are arranged flexibly; the test range is wide; a plurality of test methods, such as planar laser-induced fluorescence, a laser absorption and scattering method, a Phase Doppler method, a schlieren method and Mie scattering, combination of various test methods and simultaneous measurement can be realized for spraying, evaporating, mixing, combusting, soot forming and the like; a testing optical circuit can be arranged at any angle; the spherical multifunctional constant volume bomb has universality.

Description

technical field [0001] The invention belongs to the technical field of heat engines, and relates to a constant-volume container for fuel spray and combustion testing, in particular to a device capable of generating a gas environment (pressure, temperature, composition) similar to a heat engine combustion chamber, suitable for fuel spray The process of atomization, evaporation, mixed gas formation, combustion and other optical tests and experiments of its various characteristics. Background technique [0002] The fuel spray characteristics of a thermal engine are one of the most important factors affecting engine performance, and for high-pressure direct injection gasoline engines, diesel engines, liquid fuel ramjet engines, gas turbines, etc., the atomization characteristics, evaporation characteristics, and mixing characteristics of fuel almost determine Engine ignition, combustion and emissions and other important performance. Therefore, obtaining and mastering the charac...

AI Technical Summary

Problems solved by technology

Constant volume bombs with this structure are mostly equipped with internal heating components, and the target temperature and its uniformity are difficult to control

And there will be an interval between the two experiments, which requires repeated cycles of inflation-heating-deflation-reinflation-reheating, the experiment takes a long time and the experiment efficiency is low

[0013] The second is that the constant-volume projectile has a complex and heavy structure, but its bearing strength is not high. For example, when the diesel engine is near the top dead center, the pressure in the combustion chamber can reach about 10MPa. Also complex and bulky, inconvenient to process

[0014] Third, the scope of testing is not wide enough

However, since the bomb-container body still adopts the conventional orthogonal polyhedron design, the angle between the axes of each window is limited to 90° or 180°, and it is difficult to realize the optical path arrangement at any angle. Dependency measurement of particle size; the phase Doppler (PDI / PDA) analyzer mentioned in the patent is used to test the droplet size (requiring that the incident light and the camera axis form an angle of 150°) is also based on the Due to the light guide groove and chamfer structure on the glass holder, the measurement range is limited, and at this time, the incident light and the outgoing light do not pass through the quartz glass vertically, and the refraction of light in the glass will cause certain errors in the test.

Furthermore, under a certain visualization window size and the strength to withstand high temperature and high pressure, the structural design of the orthogonal polyhedron will make the body structure bulky (detailed below)

Images