An energy-to-mass ratio solution method for the heat dissipation performance of a fluid loop radiator

Abstract

The invention discloses an energy-mass ratio method for solving heat dissipation of a radiator in a fluid loop. The energy-mass ratio method comprises the following steps: firstly, establishing an energy equation in the heat transfer process of the radiator; secondly, according to the energy equation, obtaining a fitting relational expression of the rib root temperature of the radiator and the working medium temperature; thirdly, giving an infinitesimal energy-mass ratio expression of the radiator, and solving infinitesimal energy-mass ratios of the radiator at various working medium temperatures so as to obtain a relation curve of the infinitesimal energy-mass ratios of the radiator in the fluid loop relative to the working medium temperatures; and finally, fitting the relation curve of the energy-mass ratios relative to the temperatures to obtain a fitted relational expression of the infinitesimal energy-mass ratios relative to the working medium temperatures, and establishing a relational expression in the heat transfer process for the heat exchange of the radiator so as to solve the outlet temperature of the fluid loop and ultimately obtain the heat dissipation of the radiator. The energy-mass ratio method is quick and convenient; through comparison and verification with correlated experimental data, an accuracy requirement is met; and the energy-mass ratio method has very high application value in engineering.

Description

technical field [0001] The invention relates to a method for solving the energy-to-mass ratio of the heat dissipation performance of a fluid circuit radiator, belonging to the field of spacecraft thermal control design. Background technique [0002] With the development of manned spaceflight technology, the thermal control system of spacecraft is becoming more and more complex. Space radiators are an important part of thermal control systems. High-power spacecraft, especially manned spacecraft, use fluid circuit radiators. The analysis and design of radiators is an important task in thermal control design. [0003] Due to the complex structure of the fluid circuit radiator, the heat dissipation performance analysis is a difficult point in radiator design. At present, there are mainly the following methods for analyzing the heat dissipation performance of fluid circuit radiators: [0004] (1) Determine the heat dissipation performance of the radiator through a thermal test,...

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Problems solved by technology

[0004] (1) Determine the heat dissipation performance of the radiator through a thermal test, but the cost is large and the cycle is long;

[0005] (2) The software simulation method requires high modeling accuracy;

[0006] (3) Full-scale programming calculation analysis is equivalent to software simulation, which is more difficult

[0007] The tube-fin type is a common structure for fluid circuit radiators. The difficulty of heat dissipation analysis is that the heat dissipation process is the coupling effect of convection, heat conduction and radiation, and the structure is relatively complicated. Therefore, the above three radiator analysis methods all have complicated research processes.

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