Impact of solidity and speed ratio on the performance of a contra-rotating fan

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy Pub Date : 2023-11-21 DOI:10.1177/09576509231217559

MJ Shahriyari, H. Khaleghi, M. Sadoddin, E. Benini

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Abstract

In this study, the effects of solidity and rotor speed ratio on the performance of a contra-rotating fan are investigated numerically. Simulation results have been validated by experimental tests. The test stand construction and the measurements have been performed according to ISO-5801 standard. In order to investigate the effect of blade solidity, simulations have been conducted with constant blade count of the front rotor and four configurations of the rear rotor (having 6, 8, 12 and 16 blades), and also constant blade count of the rear rotor and three configurations of the front rotor (having 8, 12, and 16 blades). Results suggest that there is an optimum solidity for the rear rotor, which gives maximum pressure rise and efficiency. Furthermore, the effects of the rotor speed ratios have been investigated in this study. It is shown that the speed of the front rotor is more effective on the fan performance, as compared to the rear rotor. Results reveal that the performance drop caused by a 25% reduction in the rear rotor blade count, can be compensated by 5% increase of the front rotor rotational speed. Therefore, a suitable choice of the speed ratio can result in light-weight and high-performance contra-rotating stages.

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稳固性和速度比对反转风扇性能的影响

本研究采用数值方法研究了固体含量和转子速比对反转风扇性能的影响。模拟结果已通过实验测试进行了验证。试验台的构造和测量均按照 ISO-5801 标准进行。为了研究叶片坚实度的影响，在前转子叶片数不变、后转子四种配置（6、8、12 和 16 片叶片）以及后转子叶片数不变、前转子三种配置（8、12 和 16 片叶片）的情况下进行了模拟。结果表明，后转子有一个最佳的稳固性，可提供最大的压力上升和效率。此外，本研究还调查了转子速度比的影响。结果表明，与后转子相比，前转子的速度对风机性能的影响更大。结果显示，后转子叶片数减少 25% 所导致的性能下降，可以通过前转子转速提高 5% 来弥补。因此，选择合适的速度比可以产生重量轻、性能高的反转级。

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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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 工程技术-工程：机械

CiteScore

3.30

自引率

5.90%

发文量

114

审稿时长

5.4 months

期刊介绍： The Journal of Power and Energy, Part A of the Proceedings of the Institution of Mechanical Engineers, is dedicated to publishing peer-reviewed papers of high scientific quality on all aspects of the technology of energy conversion systems.