Work

Study on the pulsation characteristics of Roots-type hydrogen circulation pump suppressed by a twisted-blade rotor

Year: 2025

Type: article

Abstract: A novel twisted-blade rotor was developed for Roots-type hydrogen circulation pumps to suppress pressure and flow pulsations while maintaining high flow efficiency. Three-dimensional unsteady simulations were conducted and validated through experiments, with results showing an error below 2%. The effects of blade twist angle on pump performance were systematically analyzed. The results show that increasing the twist angle can significantly reduce pulsation intensities and radial forces, with a moderate decrease in average flow rate and a nonmonotonic change in isentropic efficiency. At the optimal twist angle of 15°, flow rate and pressure pulsations decrease by 42.37% and 31.14%, respectively, while the isentropic efficiency improves by 0.83% compared with the straight-blade rotor. The pre-intake effect induced by the twisted blades promotes early pressure equalization in the transition chamber, reducing inter-chamber pressure differences and outlet fluctuations. This mechanism can smoothen the internal flow and reduces energy loss without changing the radial clearance. This design has an advantage in achieving simultaneous pulsation suppression and efficiency retention, providing new insights for the optimization of hydrogen circulation pumps.

Source: AIP Advances

DOI: 10.1063/5.0303769

Authors: Guoping Feng, Jing Yao, Xihuizi Liang, Wenjian Zhou, Dongya Li, Jianjun Zhao

Institutions: Soochow University, Suzhou Chien-Shiung Institute of Technology, Beijing General Research Institute of Mining and Metallurgy, Harbin University of Science and Technology

Language: English

Topic: Turbomachinery Performance and Optimization

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,350