Author(s): Yan Jin, Hongcheng Chen, Junxin Wu, Chao Liu
Linked Author(s): Yan Jin
Keywords: Reversible bulb tubular pump, symmetric aerofoil, bearing support, internal flow, numerical simulation
Abstract: The 3D flow field in reversible bulb tubular pump with "S" shape aerofoil impeller is analyzed. The pressure distribution on blade surface is similar at the two-way operating conditions, which indicates the symmetric aerofoil impeller with the same performance in both conditions. However, after adding the other parts to form pumping system, the performance of the reversible pumping system became different between the forward condition and reverse condition because of the asymmetry structure in the inlet passage and outlet passage. The main research is the influence of bearing support arrangement on the reversible tubular pump and the results show that the arrangement position of bearing support is certain to influence the system performance in the forward and reverse conditions. In the forward condition, the pump efficiency of the scheme of the bearing support and bulb on both sides of the impeller is higher than the scheme of the bearing support and bulb on the same side of the impeller, and in the reverse condition, the efficiency of the same side scheme is slightly higher than the both sides scheme. The forward operation efficiency is higher than the reverse one in two schemes
Year: 2017