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Lunar surface working medium discharge equivalent test device and method

A test method and test device technology, applied in the field of working fluid discharge of lunar probes, can solve problems such as inaccurate calculation, difficult calculation, complex working medium discharge, etc., and achieve the effect of ensuring effectiveness

Active Publication Date: 2021-07-09
BEIJING INST OF SPACECRAFT SYST ENG
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  • 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

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  • Lunar surface working medium discharge equivalent test device and method
  • Lunar surface working medium discharge equivalent test device and method

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiments of the present invention provide an equivalent test method for lunar surface working fluid discharge, such as figure 1 shown, including the following steps:

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

Embodiment 2

[0066] The embodiment of the present invention also provides an equivalent test device for the discharge of working fluid on the lunar surface, such as image 3 As shown in the structure, it includes conduit 1, valve, working fluid, flow resistance simulation valve 2, pressure sensor and vacuum tank 3 for simulating the vacuum environment of the lunar surface; 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 surface fluid circuit system in the orbit state; the outlet 5 of the fluid circuit forms a working medium discharge port 6 and communicates with the vacuum tank 3 . The va...

specific Embodiment approach

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

[0068] according to figure 2 As shown in the structure, DN8 transparent PVC (Polyvinyl chloride) hose is used to form a closed fluid circuit, and the pump valve assembly, cold plate, and compensator are replaced with pipe lengths of equal quality, and the length of the pipe is longer than the actual fluid circuit. length; 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 circulatory system is connected to the circuit. When the working fluid is flowing, adjust the flow...

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Abstract

The invention discloses a lunar surface working medium discharge equivalent test device and method, and the method comprises the following steps: dividing a working medium discharge process into an internal pressure driven discharge stage, a gravity driven discharge stage and an evaporation driven discharge stage according to the driving pressure and the physical characteristics of a working medium and the internal and external environments of working medium discharge; determining main influence factors of all discharge stages, and establishing an analysis model between the working medium discharge influence factors and the working medium discharge rate; based on the analysis model, constructing an equivalent test device for simulating working medium discharge in the lunar surface environment; and adopting an equivalent test device to simulate an actual on-orbit state, a thermal boundary and a working medium emission initial state. According to the method, equivalent working medium discharge simulation under the 1g / 6 gravity environment of the lunar surface under the 1g gravity environment of the ground can be realized through 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 tight in terms of weight resources. After the life of the thermal control fluid circuit on the lunar probe is over, the working fluid in the pipeline must be discharged to reduce the weight of the lunar ascender. , saving resource requirements for the detector system. [0003] The lunar surface working fluid emission process is a complex mixed process of multiphase flow, continuous flow, and discontinuous flow. It is difficult to accurately obtain the emission level through calculation methods with the flash evaporation of the working fluid and the heat absorption of phase change. Difficulty in designing for mass emissions. The system on the discharge of w...

Claims

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Application Information

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Patent Type & Authority Applications(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
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