Thermomechanical coupling mechanisms of a rotary variable nozzle for supercritical CO2 turbines under extreme operating conditions

Huashan Su, Xuding Han, Hong Chen, Xiaochang Huo, Fei Shi, Gang Wang, Hubei Key Laboratory of Hydroelectric Machinery Design , China Three Gorges University, College of Mechanical , Power Engineering, China Three Gorges University

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy

Published online on June 03, 2026

Abstract

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, Ahead of Print.
Addressing the operational stability challenges of supercritical carbon dioxide turbines under off-design conditions, this paper presents a novel inlet regulation mechanism featuring a rotary variable nozzle. Using a fully coupled fluid-thermal-structural ...