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Journal of Thermal Science

热科学学报

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2023 , Vol. 32 >Issue 1: 59 - 80

DOI: https://doi.org/10.1007/s11630-022-1704-8

能源利用

Experimental and Numerical Research on Strengthening the Performance of Wave Rotor Equipment with Curved Passages

  • ZHAO Yiming ,
  • LI Haoran ,
  • HU Dapeng
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  • Department of Chemical Machinery, Dalian University of Technology, Dalian 116012, China

网络出版日期: 2023-11-28

基金资助

This study is supported by the National Key Research and Development Program of China (No. 2018YFA0704600).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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Experimental and Numerical Research on Strengthening the Performance of Wave Rotor Equipment with Curved Passages

  • ZHAO Yiming ,
  • LI Haoran ,
  • HU Dapeng
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  • Department of Chemical Machinery, Dalian University of Technology, Dalian 116012, China

Online published: 2023-11-28

Supported by

This study is supported by the National Key Research and Development Program of China (No. 2018YFA0704600).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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摘要

波转子技术作为一种无需借助机械部件即可实现气体间能量高效传递的压力交换设备，在燃气轮机循环系统及气体膨胀制冷等领域均已获得了丰富的研究、应用成果。由于气体间能量交换均在波转子流道内完成，因此其结构形式对于此类设备的性能会产生重要影响。本文以气波引射技术为基础，完成了弯曲型流道在膨胀型波转子技术中的首次应用实验，并通过与常用的直流道进行对比实验及三维数值模拟分析，获得了弯曲流道对于压力交换过程整体性能的提升效果及机理。实验结果表明，本文研究所用的弯曲流道转子（CIR转子）的最高等熵效率可达61.6%，其在各工况下的性能参数值均较直流道转子（STR转子）有所提升；各实验膨胀比下，CIR转子的最大效率相对提升比例均可超14.2%，引射率的最大相对提升量均可达5%以上；另外，CIR转子也可有效提升中压产气中的静压占比，并降低设备的运转功耗。三维数值模拟结果表明，CIR转子的弯曲流道可有效降低包括高压气体入射、喷嘴内排气流动以及流道内气体高速流动过程的涡旋、粘性耗散等各类能量损失，从而实现了压力交换过程整体效率的相对提升。

本文引用格式

ZHAO Yiming , LI Haoran , HU Dapeng . Experimental and Numerical Research on Strengthening the Performance of Wave Rotor Equipment with Curved Passages[J]. 热科学学报, 2023 , 32(1) : 59 -80 . DOI: 10.1007/s11630-022-1704-8

Abstract

The wave rotor technology is an energy exchanging approach that achieves efficient energy transfer between gases without using mechanical components. The wave rotor technology has been successfully utilized in gas turbine cycle systems, gas expansion refrigeration and a variety of other industrial domains, yielding numerous researches and application outcomes. The structure of wave rotor passages inside which the energy exchange between gases is realized has an important impact on the equipment performance. In this study, based on gas wave ejection technology, the first application trials of an expansion wave rotor with curved passages were conducted. Additionally, the performance enhancing effect and mechanism of curved passages on the energy exchanging process were studied precisely by the combination of experimental and three-dimensional numerical simulation methods. 
The experimental results demonstrate that the curved passage rotor (CIR rotor) employed in this research has a maximum isentropic efficiency of 61.6%, and the CIR rotor achieves higher efficiency than the straight passage rotor (STR rotor) on all working conditions in this study. Compared with the STR rotor, the maximum efficiency improving ratio of CIR rotor can exceed 14.2% at each experimental expansion ratio, and the maximum relative increments of ejection rate are more than 5%. In addition, the CIR rotor can also effectively increase the proportion of static pressure in total pressure of the medium-pressure gas, and reduce the device power consumption. The three-dimensional numerical investigations revealed the principle of gas ejection in the wave rotors and explained why the CIR rotor performed better. According to the numerical findings, the curved passages of the CIR rotor may effectively minimize various energy losses created in the processes of high-pressure gas incidence, exhausting flow in nozzle, and high-speed gas flow in the passages.

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