Biomimetic Stator Vane Design for Radial Turbines in Waste Heat Recovery Applications.

IF 3.4 3区医学 Q1 ENGINEERING, MULTIDISCIPLINARY

Biomimetics Pub Date : 2025-07-15 DOI:10.3390/biomimetics10070463

Fuhaid Alshammari, Ibrahim Alatawi, Muapper Alhadri

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Abstract

Organic Rankine Cycle (ORC) systems are widely used for converting low-temperature waste heat into useful power, but their overall efficiency depends heavily on the turbine's performance, particularly the stator vane design in radial turbines. This study introduces a biomimetic approach to turbine design by implementing cambered stator vanes inspired by bird feather geometry. These specially shaped vanes are added to a radial inflow turbine and compared to a traditional design that uses straight (symmetric) vanes. The new cambered design helps guide the airflow more effectively, leading to higher tangential speeds and better energy transfer. Simulations show that this design increases the turbine's power output from 388.6 kW to 394.87 kW and improves the system's overall efficiency from 8.78% to 10.12%. A detailed study of different camber levels found that moderate curvatures (around 8-12%) gave the best results. Overall, this study demonstrates that implementing biomimetic cambered stator vanes in radial turbines can significantly enhance turbine performance and improve cycle-level efficiency in ORC systems for waste heat recovery.

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余热回收应用中径向涡轮机的仿生定子叶片设计。

有机朗肯循环（ORC）系统广泛用于将低温废热转化为有用的动力，但其整体效率在很大程度上取决于涡轮机的性能，特别是径向涡轮机的定子叶片设计。本研究引入了一种仿生涡轮设计方法，采用受鸟类羽毛几何形状启发的弧形定子叶片。这些特殊形状的叶片被添加到径向流入涡轮中，与使用直（对称）叶片的传统设计相比。新的弧形设计有助于更有效地引导气流，从而实现更高的切向速度和更好的能量传递。仿真结果表明，该设计将涡轮输出功率从388.6 kW提高到394.87 kW，将系统总效率从8.78%提高到10.12%。一项对不同弯曲度的详细研究发现，中等弯曲度（约8-12%）的效果最好。总体而言，本研究表明，在径向涡轮机中实施仿生弧形定子叶片可以显著提高涡轮机性能，并提高ORC系统的循环水平效率，用于废热回收。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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