Experimental investigation of heat transfer efficiency on the convex surface of the annular channel of varying geometry intensifiers

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Komov, A.T.^1 ; Varava, A.V.^1 ; Zakharenkov, A.V.^1 ; Dedov, A.V.^1 ; Boltenko, E.A.^2 ; Agishev, B.Y.^1

General Physics and Nuclear Fusion Department, National Research University, Moscow Power Engineering Institute, 14 Krasnokazarmennaya Street, Moscow, Russia^1

Physics Laboratory, Elektrogorsk Research Center on the Safety of Nuclear Power Plants, 6 St. Constantine Street, Elektrogorsk, Russia^2

关键词: Enhancement of heat transfer;    Experimental investigations;    Geometric characteristics;    Heat transfer efficiency;    Hydraulic resistances;    Maximum heat transfer;    Research universities;    Single-phase convections;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/11/112005/pdf
DOI  :  10.1088/1742-6596/754/11/112005

来源: IOP

【 摘 要 】

The work is a continuation of the experimental studies on the enhancement of heat transfer in the fuel assembly on the experimental stand in National Research University «Moscow Power Engineering Institute». The description of the experimental setup, construction and main geometrical parameters of intensifier are presented. The new experimental data on the pressure loss and heat transfer coefficient using an edge enhancer - twisted wire single-phase convection mode are presented. In the research, the range mode parameters and geometric characteristics of the intensifier were extended. The relation of the coefficients of hydraulic resistance and the Nusselt number of steps twist twisted wire was found, the effect of the ribs on the heat transfer coefficient was shown. It is found that for any twist pitch ranging from 20 to 100 mm corresponds to a maximum heat transfer rib height H = 0,35. An increase in the heat transfer coefficient in the convex heating surface was experimentally obtained.