Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 26, 2021 - July 27, 2021
If the water piping system under high temperature and pressure is damaged and water is ejected into the atmosphere, jet with depressurization boiling (Flashing) may occur. Therefore, it is necessary to evaluate the range of the impact on surrounding equipment and people, but the existing standards do not specify the spreading angle of the flashing jet. In order to evaluate the spreading angle of the flashing jet in the case of pipe failure, the solution method and characteristics of a flow analysis code were investigated to develop a method for evaluating the flashing jet behavior. As a result, CRUNCH CFD was selected with the necessary simulation model to analyze the flashing jet. A simulation test of the flashing jet was performed to confirm the validity of the simulation method. The shock wave behavior, and pressure and temperature distribution near the nozzle of the flashing jet were reproduced, and the validity of the simulation method for the flashing jet using CRUNCH CFD was confirmed.
