Published 1986
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A model of the fluid temperature field in a turbulent flow parallel to heated tube bundle
Description
Basic understanding of thermal-hydraulic phenomena is essential to achieving reactor fuel assembly performance analysis. In this paper, a dimensionless parameter - a normalized fluid temperature - is defined and applied to fluid temperature measurements at particular positions at the exit plane of a bank of nine heated tubes, under different transverse heat flux shapes. This parameter presents an asymptotic trend to equilibrium values, which depend upon considered positions and flux shapes, when increasing the bulk Reynolds Number. Proposed correlations underlie the present approach to predict the fluid temperature field within the tube bundle. (Author)
Abstract (Portuguese)
O conhecimento basico dos fenomenos termo-hidraulicos e fundamental na analise do desempenho dos feixes combustiveis nucleares. Neste trabalho, um parametro adimensional - uma temperatura normalizada de fluido - e definido e aplicado a valores medidos de temperatura em pontos caracteristicos, no plano de saida do refrigerante, de feixe de nove tubos aquecidos, submetidos a diferentes distribuicoes transversais de fluxo de calor. Este parametro apresenta tendencia assintotica a valores de equilibrio, os quais dependem da localizacao do ponto considerado e das formas de fluxo, quando se aumenta o Numero de Reynolds do escoamento. Correlacoes propostas constituem a base de aplicacao do modelo, permitindo a analise do campo de temperatura de fluido no feixe de tubos. (Autor)Files
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Additional details
Additional titles
- Original title (Portuguese)
- Um modelo de estudo de campo de temperatura de fluido em escoamento turbulentos paralelo a feixe de tubos aquecidos
Publishing Information
- Imprint Pagination
- 8 p.
- Report number
- NUCLEBRAS-CDTN--548
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 19032704
- Subject category
- S42: ENGINEERING;
- Descriptors DEI
- FUEL ASSEMBLIES; HEAT FLUX; MATHEMATICAL MODELS; TEMPERATURE DISTRIBUTION; TURBULENT FLOW
- Descriptors DEC
- FLUID FLOW