In their paper “Preliminary Design and Performance Analysis of a Positive Displacement Hydraulic Turbine” Arihant Sonawat supervised by Dr. Jin-Hyuk Kim and their colleagues looked into the causes of pulsations in torque, pressure, and flow rate due to the fluid flow characteristics of a hydraulic turbine using numerical methods including TwinMesh™.

In their conclusion Sonawat and his research fellows wrote: “A positive displacement turbine was designed for the specified operating conditions using the fundamental principles. The application of this PDT was for harnessing the untapped energy from the water transportation pipelines, which is otherwise dissipated. The unsteady numerical analysis of the preliminary design revealed the pulsating nature of flow. The causes of these pulsations were examined from the fluid flow characteristics. The pulsation in torque and pressure was due to the continuous change in void area seen by the fluid and the pulsation in flowrate was due to the increased leakage losses arising from squeezing of fluid from the variation in the clearance volume. The drop in the overall hydraulic performance was the result of leakage losses and flow irregularities arising from the mixing of leakage flow with the main flow. Also, the occurrence of cavitation was identified and elimination of it will be performed.”

We appreciate the good work moreover, we believe that their ongoing research will be successful because they are using the right tools, ANSYS CFX and TwinMesh™ respectively, for this kind of challenging research. In addition, our trusted partner Anflux Co., Ltd. and namely Yong-Kab Lee will make sure that Dr. Kim’s research group at KITECH gets the right support for their numerical analyses.