Abstract: Temperature fluctuations. arising when fluids with different temperature are mixed. cause high cycle thermal fatigue to materials of plant components. Thus analyzing the characterist ics of these temperature fluctuations is important for plant maintenance. In this study, a large eddy simulation, one of the detailed turbulence simulation methods. was applied to the analysi s of two typical flow patterns with temperature fluctuations in a tee pipe. Results were compared with the experimental data. ...
英字タイトル:
Evaluation of Fluid Temperature Fluctuations in a Tee Pipe by Detailed Turbulence Simulations

The cavity flow is driven by the main flow where the branched flow from main pipe in plants is stagnant. Heat of main flow is transported to the branch pipe and the thermal stratification is formed in the branch pipe. It is necessary that the locatio n of thermal stratification can be predicted in order to estimate the thermal fatigue of pipe wall. This study predicts the location of thermal stratification using numerical simulation, and showed the prediction has good agreement with experiments....
英字タイトル:
Numerical Simulation of Thermal Stratification in a Branch Pipe