Well with Jet Pump
This example shows a well jet pump installation. The well jet pump installation presented in this example consists of a surface-mounted centrifugal pump and a jet pump installed in the well below the surface of the water.
Model
System Schematic
In this well jet pump installation, the distance between the centrifugal pump and water level is 36 feet. The jet pump installed in the well 1.5 feet below the surface of the water. See the schematic below.
The centrifugal pump has the capacity of 130 gallons/min with the head of 15 m at nominal conditions. The pipe between the centrifugal pump output and the jet pump inlet has a 2.5 inch diameter and is 37.5 feet long. The diameter of the pipe connecting the jet pump output and centrifugal pump input is 4 inches, and it is 36 feet long. The centrifugal pump output is divided into two parts: one goes through the check valve into the tank, and the rest is diverted to the inlet of the jet pump.
The jet pump parameters were initially determined based on recommendations provided in the Pump Handbook by Karassic, I. J., et al (third edition, 2001), and then modified to simplify the calculations. As a result, the primary flow rate (
) of the jet pump is 107 gpm, the secondary flow rate (
) is 28.5 gpm, and the output of the pump assembly toward the tank (
) is 28.5 gpm.
Simulation Results from Simscape Logging
The plots below show flow rates into and out of the jet pump and the volume of the water tank.
