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Characteristic parameter design method of two-phase fluid system capable of inhibiting gravity influence

A fluid system and characteristic parameter technology, applied in the field of spacecraft thermal control, can solve problems such as simulating 1/6g or microgravity environment difficulties

Pending Publication Date: 2019-06-07
BEIJING INST OF SPACECRAFT SYST ENG
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the ground verification test, it is difficult to simulate 1 / 6g or microgravity environment

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  • Characteristic parameter design method of two-phase fluid system capable of inhibiting gravity influence
  • Characteristic parameter design method of two-phase fluid system capable of inhibiting gravity influence
  • Characteristic parameter design method of two-phase fluid system capable of inhibiting gravity influence

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Embodiment Construction

[0063] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0064] This embodiment provides a method for designing characteristic parameters of a two-phase fluid system that can suppress the influence of gravity. In the two-phase fluid system, the five dimensionless parameters that characterize the characteristics of the two-phase fluid system and gravity are respectively the Bond number (Bond German number) Bo, Froude number (Froude number) Fr, Grashof number (Grashoff number) Gr, Reynolds number (Reynolds number) Re and Rayleigh number (Rayleigh number) Ra; where Bo number represents the buoyancy in the fluid The ratio of surface tension to surface tension, the Fr number represents the ratio of inertial force to gravity (buoyancy) in the fluid, the Gr number represents the ratio of buoyancy to viscous force caused by temperature changes in the fluid, and the Re number represents the ratio of inertial force to visc...

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Abstract

The invention discloses a characteristic parameter design method of a two-phase fluid system capable of inhibiting gravity influence, and belongs to the technical field of thermal control of spacecrafts and comprises the following specific steps of: step 1, determining a working mode of the two-phase fluid system according to the characteristics of gas-liquid flow and gas-liquid distribution in the two-phase fluid system; step 2, according to the working mode of the two-phase fluid system, analyzing the influence of buoyancy and viscous force caused by buoyancy, surface tension, inertia force,gravity (buoyancy) and temperature change on the two-phase fluid under the condition of 1g of gravity, and calculating to obtain the value range of the characteristic parameter d. According to the method, by analyzing the influence of gravity conditions on working medium flow heat exchange in the phase change working process, the characteristic parameter selection criteria irrelevant to the gravity of the two-phase fluid system under the conditions of 1g and 0g (gm (1g) are obtained.

Description

technical field [0001] The invention belongs to the technical field of spacecraft thermal control, and in particular relates to a method for designing characteristic parameters of a two-phase fluid system capable of suppressing the influence of gravity. Background technique [0002] Space two-phase thermal management technology uses two-phase phase change latent heat to achieve efficient heat transfer, which is an effective technical means to solve high-power heat transfer and heat dissipation of space spacecraft. Typical two-phase heat transfer and heat dissipation technologies used in space include loop heat pipes, lunar 1 / 6g gravity-driven two-phase fluid circuits, variable heat conduction heat pipes, water sublimators, evaporators, etc. Among them, the loop heat pipe, the lunar 1 / 6g gravity-driven two-phase fluid circuit, and the variable heat conduction heat pipe belong to the high-efficiency two-phase heat transfer technology, and the water sublimator and evaporator be...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 李劲东王玉莹钟奇宁献文吕巍李享苗建印
Owner BEIJING INST OF SPACECRAFT SYST ENG