Investigation of Effect of Supercritical Water Properties in Pseudocritical Region on Heat Transfer Characteristics

The water property will have a big variation in the pseudo-critical region under supercritical conditions and largely impact the heat transfer and fluid flow characteristics of the supercritical water. The water property data will directly affect the credibility of the numerical prediction results. In this study, the FLUENT software was used as the simulation platform to analyze the sensitive factor of water properties to heat transfer behaviors based on two supercritical water heat transfer experiments and a new method of improving the capacity of water properties was established with user defined functions（UDF）. The new water property dealing method improved the prediction capability in comparison with the experimental results.