Experiment on Density Wave Oscillation Instability of Two-Phase Flow in Low Mass Velocity Parallel Vertical Rifled Tubes

Experimental studies on density wave oscillation instability of two-phase flow in parallel vertical rifled tubes were conducted on two-phase high pressure test loops.The main characteristics of density wave oscillation instability were perceived.In the range of test parameters,the effects of heat flux,pressure,mass velocity,inlet sub-cooling,asymmetric heat flux on the density wave oscillation instability of two-phase Steam-water two-phase flow were explored and analyzed.Based on the test result and using the homogeneous model,the threshold relational expressions of density wave oscillation instability were obtained.