TRANSIENT-BEHAVIOR OF A SPRINGLESS FLAPPER VALVE - CLOSING MOTION

The closing of a springless flapper valve was investigated in order to gain a better understanding of the transient behavior of the valve, A n experimental investigation included simultaneous measurement of pres sure and flapper velocity, An analytical investigation included the de velopment of a model to predict the closing of the flapper valve. The flapper closing was experimentally determined to require from 18 to 24 percent of a cycle, and the model predictions were in a good agreemen t with experimental data for the flapper closing time. The present stu dy should be a useful contribution to future modeling of flapper valve s and other springless valves.