Semi-underground large-size horizontal vacuum container for plume test

Abstract

The invention discloses a semi-underground large-size horizontal vacuum container for plume test research, which comprises a vacuum container, a vacuum acquiring system, a propellant supply system and a matching foundation, belongs to the field of brand-new tests, is different from the traditional ring die devices and is specially used for the plume effect test research of an engine. The semi-underground large-size horizontal vacuum container is designed into a semi-underground structure, the low-half part of the vacuum container is positioned below the horizontal plane, the vertical distance from the central axis of the vacuum container to the horizontal plane is 1.3m and is controlled to be within a range of the body height of an adult, and thus, a worker conveniently installs and maintains test devices such as an engine at the central axis in the vacuum container; and the diameter of a door is about 2.4m, the design difficulty of the door is lowered, the door is conveniently opened or closed, people enters or exits from the door, and thus, the demand of the flume test is met. The lower end of a rear saddle is fixed firmly by using a base plate and a rear bearing foundation, and thus, the radial movement of the vacuum container is avoided, and the height of the rear saddle can be regulated through the thickness of the base plate.

Description

technical field [0001] The invention belongs to the field of engine vacuum science and technology, and relates to a vacuum container used for experimental research, in particular to a semi-underground vacuum container used for engine plume experimental research. Background technique [0002] The attitude and orbit control engines widely used on artificial satellites, spacecraft, space stations, deep space probes, missiles and launch vehicles, when working in a high-altitude thin environment, their jets will expand freely to the external environment to form a vacuum plume. The plume will have plume effects such as plume pollution, plume disturbance force and plume thermal effect on the spacecraft. These effects can reduce the performance of working components at least, and lead to the failure of flight missions at worst. With the rapid development of the aerospace industry, the aerospace design department is paying more and more attention to the plume problem generated when ...

AI Technical Summary

Problems solved by technology

[0004] The STG vacuum plume test system has its own shortcomings, that is, the cabin volume is small and the plume test capability is limited. For the engine plume test with a flow rate greater than 2g / s, the dynamic vacuum degree cannot be maintained at 10 -3 Above Pa, it cannot reflect the real working conditions of the engine in vacuum, so there is an urgent need for a large-sized vacuum container specially used for the engine plume test

At the same time, in order to ensure the symmetry of the plume flow field during the plume test, the test equipment such as the engine must be installed at the central axis of the vacuum vessel. For a large-diameter vacuum vessel, the central axis of the vessel is much higher than the height of the human body, which is inconvenient. Operation requires staff to install the equipment in the cabin with the aid of ladders and other climbing equipment. Working at heights not only faces personal safety problems, but also the installation and maintenance of equipment is extremely inconvenient.

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