Ms. Fengqi Zhu Profile

Fengqi Zhu

at Beijing Research Institute of Precise Mechatronics and Controls

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Proceedings Article | 20 September 2022 Paper

Numerical and experimental investigation on a two-stage reentry turbine

Fengqi Zhu, Xiancheng Song, Shumin Zhang, Zhenjiang Li, Liguo Hu

Proceedings Volume 12261, 1226145 (2022) https://doi.org/10.1117/12.2638920

KEYWORDS: Servomechanisms, Numerical simulations, Aerodynamics

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A reentry turbine is a multi-stage turbine with only one disk, and the medium is re-introduced into the turbine cavity to do work. The reentry turbine is suitable for partial admission, which has the characteristics of small volume and high output power. This paper propose a two-stage reentry turbine of 90-millimeter-mean-diameter, and the stator is replaced by the reentry turbine pipe and Laval nozzles that change the direction and accelerate the medium. Numerical simulation indicates that the reentry turbine can maintain high efficiency; besides, the maximum torque and tangential force on a single blade of the reentry turbine are less than that of the one-stage turbine under the same conditions. The CFD calculation of the two-stage reentry turbine promised 146.7 kW output power, whereas the experiments confirmed 137 kW output power, and the simulation error is less than 7.1%. The output power of the reentry turbine is increased by 13.2% compared to the one-stage turbine. The reentry turbine can achieve high specific power with a compact structure at the condition of the increased total to static pressure radio and a small flow rate.

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