Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A lunar surface working medium emission equivalent test device and method

A test method and test device technology, which are applied in the field of working fluid emission of lunar probes, can solve the problems of inaccurate calculation, difficult calculation, complicated working fluid discharge, etc., and achieve the effect of ensuring effectiveness

Active Publication Date: 2022-07-29
BEIJING INST OF SPACECRAFT SYST ENG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the vacuum environment on the lunar surface makes the discharge of working fluid very complicated, involving the flow of rarefied gas. Based on the current theory of computational fluid dynamics, it is very difficult or impossible to calculate the discontinuous flow with Kn (Knudsen number) greater than 0.01. Accurate, especially for complex detector pipeline systems, it is impossible to use numerical simulation to obtain the discharge process of working fluid

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A lunar surface working medium emission equivalent test device and method
  • A lunar surface working medium emission equivalent test device and method
  • A lunar surface working medium emission equivalent test device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The embodiment of the present invention provides an equivalent test method for the emission of working fluid on the lunar surface, such as figure 1 shown, including the following steps:

[0047] Step S100, according to the physical characteristics of the working medium and the internal and external environment of the working medium discharge, the working medium discharge process is divided into an internal pressure driven discharge stage, a gravity driven discharge stage and an evaporation driven discharge stage according to the driving pressure; the working medium may be liquid fluorine Carbon working medium; in the lunar surface 1g / 6 gravity vacuum environment, the discharge of working medium involves complex processes such as liquid flash evaporation and gas-liquid two-phase critical flow; the external environment of working medium discharge port 6 is the lunar surface 1g / 6 gravity environment, The moon surface is a vacuum; the working medium discharge port 6 is a pu...

Embodiment 2

[0066] The embodiment of the present invention also provides a lunar surface working medium emission equivalent test device, such as image 3 As shown in the structure, it includes a conduit 1, a valve, a working medium, a flow resistance simulation valve 2, a pressure sensor, and a vacuum tank 3 for simulating the lunar vacuum environment; such as figure 2 As shown in the structure, the conduit 1 is connected to form a fluid circuit; the working medium is filled in the fluid circuit; the valve is installed at the inlet 4 and the outlet 5 of the fluid circuit; the flow resistance simulation valve 2 and the pressure sensor are installed in the fluid circuit, and the flow resistance simulation valve 2 The flow resistance used to adjust the fluid circuit is equal to the flow resistance of the lunar fluid circuit system in the on-orbit state; the outlet 5 of the fluid circuit forms the working medium discharge port 6 and communicates with the vacuum tank 3 . The valves may includ...

specific Embodiment approach

[0067] In the above-mentioned equivalent experimental device, the actual on-orbit equipment is equivalent to the corresponding length l of the conduit 1 and the height h relative to the discharge port according to the included work quality and installation position. The specific implementation is as follows:

[0068] according to figure 2 As shown in the structure, a DN8 transparent PVC (polyvinyl chloride, Polyvinyl chloride) hose is used to form a closed fluid circuit. The pump valve assembly, cold plate, and compensator are replaced with pipe lengths of equal quality, and the pipe length is longer than the actual fluid circuit. Long; the vertical height H of the fluid circuit is 1 / 6 of the actual fluid circuit height, taking the working medium discharge port 6 as the reference point, the height of each pipeline relative to the working medium discharge port 6 is 1 / 6 of the actual relative height; The circulation system is connected to the loop. When the working medium is f...

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

No PUM Login to View More

Abstract

The invention discloses a lunar surface working medium discharge equivalent test device and method. The equivalent test method includes the following steps: according to the physical characteristics of the working medium and the internal and external environment of the working medium discharge, the working medium discharge process is driven according to the driving The pressure is divided into the internal pressure driven discharge stage, the gravity driven discharge stage and the evaporation driven discharge stage; the main influencing factors of each discharge stage are determined, and the analytical model between the influencing factors of the working fluid discharge and the working fluid discharge rate is established; Equivalent test device for simulating working fluid emission in the lunar environment; the equivalent test device is used to simulate the actual on-orbit state, thermal boundary and initial state of working fluid emissions. The above method can realize the equivalent working medium emission simulation under the 1g / 6 gravity environment of the lunar surface under the ground gravity environment of 1g through the equivalent simulation of the equivalent test device.

Description

technical field [0001] The invention relates to the technical field of lunar probe working medium discharge, in particular to a lunar surface working medium discharge equivalent test device and method. Background technique [0002] At present, due to the limitation of carrying capacity, deep space probes are particularly limited in terms of weight resources. After the end of life of the thermal control fluid circuit on the lunar probe, the working fluid in the pipeline must be discharged to reduce the weight of the lunar surface ascender. , saving resource requirements for the detector system. [0003] The lunar surface working fluid emission process is a complex mixing process of multiphase flow, continuous flow, and discontinuous flow. It is difficult to accurately obtain the emission degree through calculation methods with the flashing of the working medium and the endothermic process of phase change. The design of mass emissions brings difficulties. The ground system f...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00B64G7/00
CPCG01M99/005B64G7/00
Inventor 徐侃宁献文张高蒋凡王玉莹张栋薛淑艳苏若曦周晓伶
Owner BEIJING INST OF SPACECRAFT SYST ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com