Session: Student Poster Competition

Submission Number: 185564

Novel Method for Optimizing Tco₂ Centrifugal Pump Blade Profiles: An Inverse Problem Framework Driven by Forward Problem Geometric Features 

As a key component in carbon capture, utilization, and storage (CCUS) systems and transcritical carbon dioxide (TCO₂) power cycles, the centrifugal pump is responsible for pressurizing and transporting CO₂ from its dense-phase liquid state to the supercritical state. However, due to the unique thermodynamic and flow characteristics of TCO₂, traditional forward and inverse design methods demonstrate limited adaptability and suboptimal performance in such applications. In response, this paper proposes an inverse problem-based optimization design method for TCO₂ centrifugal pump blade profiles, guided by geometric features extracted from forward problem analysis. A theoretical model for optimal blade geometry is first established based on the forward problem theory, and a blade profile database is constructed using the Zangeneh-Goto (Z-G) inverse design approach. The optimal blade family is then selected and evaluated through computational fluid dynamics (CFD) simulations. At a specific speed of 52, the optimized blade achieves a hydraulic efficiency of 89.68%, which is 3.11% and 2.37% higher than the conventional forward and inverse design approaches, respectively. Moreover, the impeller work consumption is reduced by 13.22% under pressure difference constraints. CFD flow field analysis further indicates that the optimized blade effectively suppresses high-intensity turbulent regions (recirculation regions), thereby reducing energy loss and enhancing the flow performance of TCO₂ during the pressurization process. These findings demonstrate the feasibility and superiority of the proposed method, which integrates geometric features derived from the forward method into inverse optimization for improved TCO₂ pump design.

Presenting Author: Zhiyong Zhang Tianjin University

Presenting Author Biography: Zhang Zhiyong, a PhD student at the School of Mechanical Engineering, Tianjin University, mainly researches supercritical and transcritical carbon dioxide centrifugal pumps.

Authors:

Zhiyong Zhang Tianjin University
Hua Tian Tianjin University
Lingfeng Shi University of Science and Technology of China
Yurong Wang Tianjin University