EDN: SQDUIX
Authors & Affiliations
Levchenko V.A.1, Kascheev M.V.1, Aksenov I.A.2
1 The Limited Liability Company “Simulation Systems Ltd.”, Obninsk, Russia
2 Branch Centeratomtechenergo JSC Atomtechenergo, Moscow, Russia
Levchenko V.A. – Director, Cand. Sci. (Tech.).
Kascheev M.V. – Chief Researcher, Dr. Sci. (Tech.). Contacts: 133, Lenin st., Obninsk, Kaluga region, Russia, 249035. Tel.: +7 (48439) 6-03-61; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Aksenov I.A. – Еngineer of the 2d Category.
Abstract
The article is devoted to determining the effect of energy release in a straight fin of a rectangular profile on its characteristics by a two-dimensional stationary model and comparing the characteristics of the fin obtained using one-dimensional and two-dimensional stationary models. An analytical solution of a two-dimensional stationary problem of heat conduction in a straight fin with a rectangular profile and continuously operating heat sources is obtained by applying the method of finite integral transformations. The efficiency of the fin and the heat flow through the base of the fin are determined. The energy release in the fin increases its efficiency in comparison with the efficiency of the fin in the absence of energy release, and also reduces the heat flow. The restriction by the values of energy release in the fin is found as condition for the applicability of the finning. The linear heat flow through the base of the fin must be greater than zero. If the linear heat flow is less than zero, the fin plays the opposite role: the flow is directed in the reverse side. In the article, an expression is obtained for the surface build-up coefficient kb. When calculating the heating (cooling) of a body with a finned surface, the heat transfer coefficient should be increased by kb times. The calculations performed in the article demonstrated the effect of energy release on the characteristics of the fin. The efficiency of the fin, the linear heat flow through the base of the fin and the surface build-up coefficient obtained from the two-dimensional model differ downward from the corresponding characteristics calculated by the one-dimensional model, with the same initial data.
Keywords
surface finning, fins with energy release, extended surface, straight fin of the rectangular profile, the efficiency of the fin, heat flow, two-dimensional stationary problem of heat conduction for a fin, method of finite integral transformations
Article Text (PDF, in Russian)
References
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UDC 536.21
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2023, no. 4, 1:18
