Научная электронная библиотека ULRICH'S Periodicals Directory

Сибирский государственный университет
науки и технологий имени академика М.Ф. Решетнева

Сибирский аэрокосмический журнал
ISSN 2712-8970 (Print) ISSN 2782-5760 (on-line)

Сведения об образовательной организации

UDK 536.2 Doi: 10.31772/2587-6066-2020-21-2-226-232
CALCULATION OF HEAT TRANSFER CHARACTERISTICS OF A FINNED WALL
E. N. Vasil'ev
Institute of Computational Modelling SB RAS; 50/44, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
The reliability and resource of the radio-electronic equipment of the spacecraft is increased by ensuring op-timal temperature conditions. Thermal control systems maintain the set temperature mode and heat removal from the onboard equipment to the surrounding space. Finned heat exchangers are an important element of the de-sign of thermal control systems, which allows intensifying the heat transfer process. The calculation of the char-acteristics of finned heat exchangers must be carried out taking into account their parameters and the physical properties of the heat transfer agent. The organic liquid LZ-TK-2, which has a very low freezing point and other useful performance characteristics, is considered as a heat transfer agent. The dependences of the local heat transfer coefficient of the LZ-TK-2 heat transfer agent on the wall temperature are calculated using criteria equations. Based on the numerical solution of the two-dimensional problem of thermal conductivity, the tempera-ture fields in finned walls of various configurations are determined. Calculations of the heat transfer coefficient of the finned wall of the heat exchanger were made in two model approximations, the error of using a simplified approximation that does not take into account the temperature dependence of the local heat transfer coefficient was determined.
Keywords: thermal control system, heat transfer coefficient, finned wall, heat exchanger, heat transfer agent LZ-TK-2.
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Vasil’ev Evgenii Nikolaevich – Cand. Sc., Senior Researcher; Federal research center “Krasnoyarsk Science Centre
of the Siberian Branch of Russian Academy of Science”, Institute of Computational Modelling of the Siberian Branch
of Russian Academy of Science. E-mail: ven@icm.krasn.ru.  


  CALCULATION OF HEAT TRANSFER CHARACTERISTICS OF A FINNED WALL