Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Combined numerical and experimental researches of temperature pulsations of collector unit fragment of heat exchanger clean-up and cooldown power nuclear unit systems

4/04/2015 2015 - #01 Modelling processes at nuclear facilities

Dmitriev S.M. Ryazapov R.R. Sobornov A.E. Kotin A.V. Mamaev A.V.

DOI: https://doi.org/10.26583/npe.2015.1.10

UDC: 621.039

An experimental model of collector unit fragment of heat-exchanger clean-up and cooldown power nuclear unit systems has been designed and manufactured. Experimental researches of temperature state have been carried out with the use of a given experimental model.

Experimental temperature dispersions in characteristic zones of collector unit under investigation have been obtained. Most thermally high-stress zones of heat-exchange surface have been determined.

Researches of intensity temperature pulsations of heat-exchange surface and coolant flow in different zones has been carried out. Static and spectral characteristics of temperature pulsations have been presented. Solutions focused on degradation of intensity temperature pulsations have been proposed.

Computation model of collector unit fragment of heat=exchanger has beendeveloped. Computation models construction recommendations have been given. Results of numerical simulation transient temperature state and characteristics of temperature pulsations at the different regimes of flow of model using CFD= code ANSYS CFX 14. 0. have been presented.

Comparative analysis of experimental and computation data has been carried out. It has demonstrated that computation data are as experimental data with adequate accuracy that allows to use constructed computation data at a further substantiation heat-exchanger construction.

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heat-exchange temperature state temperature pulsations coolant collector unit CFD