沸騰二相流におけるじょう乱波に関する実験的研究

抄録

Behaviors of disturbance waves in an evaporating tube are experimentally investigated in high quality region using conductance probe method under the following conditions : pressure 2.95 Mpa, mass velocity 300, 500 and 700kg/(m² ·s), heat flux up to 1.2 MW/m² and thermodynamic quality larger than 0.80. As the results of comparison with air-water adiabatic data, it is found that the disturbance waves in the boiling steam-warter system has the following remarkable features ; a) the wave does not take sharp spike like form and has a log tail, b) scattering of the propagation speed is larger than that of the air-water system, c) the space separation of two neighboring wave does not vary significantiy with the quality. It is also confirmed that the disturbance waves have a close connection with the wall temperature fluctuation at the dryout region.