Dynamics of the water movement at the chugging process in wide pipes (theory)

This work relies on the observation made at GKSS PSS experiments at one chugging event. In short it is resumed the observed facts. First a 'bubble' developed. When part of the steam has flown off at the rim of the pipe, a cone develops. Then the tip of the cone begins to invert, and a nose grows, until only a small ring of steam can be seen, which vanishes in the pipe. Only when the ring has vanished, the main chugging, expressed in a sudden decrease of the pressure in the condensation pipe, occurs. The theoretical explanation of this behavior is investigated using hydromechanic equations. (orig./HP)