2507 Study on Air Carry-under by Water Jet Plunging into Water Pool
Details
When liquid flows down into a liquid pool as a jet flow or a film flow on a wall, it sometimes accompanies gas into the pool. If the penetrated gas drifts up and leaves from the pool surface, the phenomenon is harmless. However, when the pool is highly agitated or strong flow exists from the pool, the mingled gas in liquid is carried out from the pool. The mixed gas in the coolant may reach the reactor core such as the light water reactor or the fast bleeder reactor. It severely affects the reactivity. Thus, the carry-under of gas into the water pool by the liquid down-flow is important issue for nuclear reactors. In the present study, air carry-under into the water pool is examined. A water jet from the nozzle of 5 mm diameter plunges into the water pool. Flow behavior in the water pool is recorded. From the recorded pictures, the air carry-under volume and the penetration depth are obtained. A flow stare of the jet flow is also recorded. The relation between the jet flow situation and the air carry-under is analyzed.
