The internal flow of a sprinkler

Among different types of sprinklers, the most common sprinklers use a circular internal disk to control the flow rate of the ejecting spray by a controller. If the flow passage is not constricted based on the back pressure generated by the flow, it is possible that the huge back pressure cause damage to the equipment or the large pressure drop over the contraction results in cavitation, which is highly erosive. In this project, I conducted a series of simulations based on the k-e turbulence model to correlate a constricting disk parameter with the back pressure, pressure drop, and the flow rate of the water passing the sprinkler. The industrial party would feed the results to their controllers to improve the performance of their sprinklers.