List of publications on a keyword: «capillary»


Физика

Publication date: 05.12.2018
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Haydarov Gennadiy Gasimovich , candidate of technical sciences , associate professor
Haydarov Andrey Gennadyevich , candidate of technical sciences , associate professor
St. Petersburg State Technological Institute (Technological University) , Санкт-Петербург г

«Representation of capillary phenomena from the physical model of unpacking a liquid»

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Based on the physical model of «unpacking» a fluid, published in 1983 to explain the physical nature of surface tension, an explanation of capillary phenomena was proposed. The unified physical nature of the condensation process and the processes in the capillaries expressed in terms of the surface tension of the liquid is proved. To prove the applicability of the «unpacking» model for capillary phenomena, an empirical Borelli-Jurin formula for determining the height of fluid lifting in capillaries was theoretically derived depending on the magnitude of the surface tension. The assumptions under which the formula is obtained are indicated. In addition, the article proposes a new formula for determining the maximum height of liquid lift in the capillaries, depending on the critical temperature of the liquid and the molecular weight of the liquid.

Технические науки

Publication date: 13.03.2018
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Kozhemiachenko Aleksandr Vasilevich , doctor of technical sciences , профессор
Petrosov Sergei Petrovich , doctor of technical sciences, professor , профессор, заведующий кафедрой
Maslov Oleg Sergeevich , студент
Nikishin Vladislav Viktorovich , студент
Institute of Service Industry and Business (Brunch) FSFEI of HE "Donsk State Technical University" , Ростовская обл

«Hermetic refrigerant compressor with increased cooling capacity and test bench for its operational reliability»

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The article presents the design of the refrigerant compressor characterized in that, in order to improve performance and operational reliability, each silencer is equipped with a cooling casing connected to the cooling jacket of the cylinder by means of a capillary tube, and the inlet pipe of the cooling medium is connected to the cooling housings. The article also presents the design of the stand for testing the proposed cold-rolled compressor for operational reliability with enhanced functionality.