Experimental device for measuring low-temperature foam breaking characteristic of porous metal screen
A technology of porous metal and experimental device, applied in measurement device, measurement of fluid pressure, pressure difference measurement between multiple valves, etc., can solve the limitations of low-temperature propulsion system PMD design optimization and on-orbit mature application, unable to form efficient and reliable The problems of low temperature propellant space gas-liquid management scheme, transient characteristics, influencing factors and performance improvement strategies are not clear, etc.
Active Publication Date: 2020-10-30
XI AN JIAOTONG UNIV
View PDF8 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, due to the fact that the surface tension of cryogenic fluid is much smaller than that of normal temperature fluid, the bubble burst pressure of the metal screen is significantly attenuated in the low temperature region, and it is still impossible to form an efficient and reliable gas-liquid management solution for cryogenic propellant space
At present, this technology is still at the stage of ground laboratory research, especially for the core parameter of PMD, the screen bubble burst pressure, which still lacks sufficient low-temperature test data. Factors and performance improvement strategies are still unclear, which greatly limits the design optimization and in-orbit mature application of cryogenic propulsion system PMD
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.
[0023] refer to figure 1 , an experimental device for measuring the low-temperature bubble breaking characteristics of a porous metal screen, comprising a vacuum insulating glass Dewar 1, a booster chamber 11, a filling / discharging system, a pressure regulating system, and a data acquisition system;
[0024] The material of the vacuum insulating glass Dewar 1 is high borosilicate glass (colorless and transparent); refer to figure 2 , the main body of the vacuum insulating glass Dewar 1 is a double wall structure with a vacuum interlayer, and the interior of the vacuum interlayer is less than 1.0×11 -4 In the high-vacuum environment of Pa, the vacuum insulation technology is used to reduce the thermal influence of the external thermal environment on the low-temperature inner cavity; the inner wall surface of the vacuum interlayer is plate...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an experimental device for measuring the low-temperature foam breaking characteristic of a porous metal screen. The experimental device comprises a vacuum heat insulated glassDewar, a pressurizing cavity, a filling / discharging system, a pressure regulating system and a data acquisition system, the vacuum heat insulation glass Dewar is of a double-layer structure, and a high-vacuum heat insulation assisted silver plating radiation heat insulation mode is adopted. The top of the vacuum insulation glass Dewar is subjected to end sealing through a metal flange sealing cover, and the temperature of the metal flange sealing cover is prevented from being too low while the low-temperature environment of the lower side experiment area is maintained through a heat preservation plug structure; a gas and low-temperature liquid filling / discharging system is controlled through a low-temperature stop valve; pressure adjustment of the pressurizing cavity is achieved by controlling the opening degree of the low-temperature adjusting needle valve. According to the invention, gas-liquid distribution of the experimental area and the foam breaking process of a screen sample aredirectly observed through a visual observation window, the low-temperature foam breaking characteristic of the screen sample is reflected through the differential pressure measurement method, and a simple, convenient and reliable experimental means is provided for researching the low-temperature bubble breaking characteristic of the porous screen.
Description
technical field [0001] The invention relates to the technical field of gas-liquid management in a low-temperature propellant space, in particular to an experimental device for measuring the low-temperature bubble-breaking characteristics of a porous metal screen. Background technique [0002] With the widespread application of cryogenic propellants such as liquid hydrogen and liquid oxygen in launch vehicle systems, the development of cryogenic propellant space management technology has attracted much attention. Cryogenic propellants have special characteristics such as low temperature, low boiling point, and low surface tension. Realizing stable and efficient gas-liquid management of low-temperature propellants under microgravity conditions is the core basic technology that needs to be solved urgently. In the existing gas-liquid management technology, the propellant management device (PMD) based on the metal screen, such as the starting blue, the storage well, and the chann...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01L13/00
CPCG01L13/00G01N33/00
Inventor 马原厉彦忠谢福寿王磊李剑
Owner XI AN JIAOTONG UNIV