Numerical Investigation of Internal Energy Characteristics and Flow Field of Double Suction Pump

Abstract

In order to research the flow characteristics within the double-suction centrifugal pump, 650SY80-HY type pump is used to research, and the RNG k-ε turbulence model is selected to research and analyze the flow field within the double-suction pump under different working conditions. The results show that: the error between the results of the simulation and experimental is within an acceptable range, which verifies the precision of the numerical simulation; Under different conditions, the pressure distribution of the blade is uniform, and there is less pressure on the blade head; Under the 0.8Qd condition, due to the impact of water flow on the initial end of the partition, there is a large area of low velocity zone outside the partition, resulting in a large energy loss; The turbulent kinetic energy (TKE) mainly exists in the outside of the partition under the 0.8Qd condition, while the TKE mainly exists in the tongue under the 1.2Qd condition. Under the design condition, the vortex in the impeller channel is obviously less than that under the off-design condition. This study provides a basis for further optimization of the design of double suction pump.