Derin kuyu pompalarında kritik dalma derinliğinin boyutsuz büyüklükler ile ilişkisi.

In this study, the critical submergence of deep well pumps is analyzed. The critical submergence, which is an important parameter for centrifugal pumps and water intakes that usually have a certain diameter, is determined using dimensionless quantities. The innovative aspect of this study is that three different water inlet opening models are created for two shaft pumps with different nominal diameters, these models are related to the water inlet diameters and the critical submergence is defined using dimensionless quantities. The critical submergence of the pumps was determined using a vacuum measurement method and the critical submergence of each model at different flow rates was compared with Froude number dependent submergence equations developed by other researchers. The aim of this study is to determine the critical submergence of the pumps and to use the flow models developed at these depths with the aid of mathematical equations to ensure the operation of the pumps in the reliable zone (vortex-free). The physical models were found to be effective for vortex formation depth and vortex shape. The physical models found Fcr (critical Froude number) ≤1.40 for pump P1 and Fcr ≤1.44 for pump P2, these values can also be used to determine the suction lift of the pumps. The critical Weber and Reynolds numbers decrease as the water suction area of the pumps increases. Considering the depth of vortex formation, it would be appropriate to use the original (D0) physical models for both pumps. As a result, dimensionless quantities can be used to determine the critical submergence of deep well pumps. [ABSTRACT FROM AUTHOR]