TY - CHAP
T1 - STIN special report 1
T2 - Loading to structures due to thermal stratification in a T-joint of hot and cold pipes
AU - Pättikangas, Timo
AU - Puustinen, Markku
AU - Purhonen, Heikki
AU - Calonius, Kim
AU - Saarenheimo, Arja
PY - 2000
Y1 - 2000
N2 - Thermal stratification of hot and cold water may cause
damages in pipes of power plants. The main aims of this
study are to improve the knowledge of the effects of
thermal loads on the structures and to develop and verify
a computational tool for numerical simulation of
structural behaviour under a thermal stratification.
A well-instrumented T-joint test section of hot and cold
pipe is used for the experiments. In the hot horizontal
pipe, the flow velocity is high, and therefore the flow
is strongly turbulent. In the vertical cold pipe, the
flow velocity is very small and the flow is laminar.
Temperature, strain and displacement measurements will be
carried out in order to get data to verify the numerical
results.
Preliminary results of the computational fluid dynamics
(CFD) calculations are presented. Both the flow equations
and the thermal conduction in the pipe walls and
insulators are solved with the Fluent code. Transition
from turbulent to laminar flow occurs near the T-joint in
the cold pipe.
AB - Thermal stratification of hot and cold water may cause
damages in pipes of power plants. The main aims of this
study are to improve the knowledge of the effects of
thermal loads on the structures and to develop and verify
a computational tool for numerical simulation of
structural behaviour under a thermal stratification.
A well-instrumented T-joint test section of hot and cold
pipe is used for the experiments. In the hot horizontal
pipe, the flow velocity is high, and therefore the flow
is strongly turbulent. In the vertical cold pipe, the
flow velocity is very small and the flow is laminar.
Temperature, strain and displacement measurements will be
carried out in order to get data to verify the numerical
results.
Preliminary results of the computational fluid dynamics
(CFD) calculations are presented. Both the flow equations
and the thermal conduction in the pipe walls and
insulators are solved with the Fluent code. Transition
from turbulent to laminar flow occurs near the T-joint in
the cold pipe.
M3 - Chapter or book article
SN - 951-38-5750-7
T3 - VTT Tiedotteita - Research Notes
SP - 113
EP - 122
BT - FINNUS: The Finnish Research Programme on Nuclear Power Plant Safety
PB - VTT Technical Research Centre of Finland
CY - Espoo
ER -