Experimental investigation on overall performance of a millimeter-scale radial turbine for micro gas turbine
Experimental investigation on overall performance of a millimeter-scale radial turbine for micro gas turbine
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DOI：
10.1016/j.energy.2017.06.006
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发表时间：
2017-09
期刊：
影响因子：
9
通讯作者：
Lei Fu;Z. Feng;Guojun Li
中科院分区：
文献类型：
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作者：
Lei Fu;Z. Feng;Guojun Li
作为微型燃气轮机的主要部件和工作单元，微型燃气轮机的性能直接决定了微型燃气轮机的可实现性。为了探索微型径向涡轮的可行性，获得其性能，验证其设计结果，本文主要通过冷模试验对直径为10 mm的50w级微型燃气轮机的整体性能进行了研究。首先，展示了高速微径向涡轮气动性能试验平台。然后，进行了微型径向透平的可行性和综合性能试验。目前，采用静压气体轴承的微径向涡轮转速已达到359,900 rpm，约为冷模试验设计点转速的80%。第三，在实验数据和数值模拟的基础上，对微型燃气轮机的运行性能和综合性能进行了详细的分析和讨论。最终结果表明，在目前水平上已部分证明了直径为10 mm的毫米级微径向透平的可行性，微径向透平系统有待进一步完善。这些工作不仅获得了一些有价值的实验数据，而且积累了微径向水轮机设计的经验。本文不仅展示了试验和设计结果，供工程参考，还介绍了微型径向透平超高转速试验和性能试验中存在的运行问题及其可能的解决办法。
As a major component and work unit of micro gas turbine, the performance of micro turbine directly determines the realizability of micro gas turbine. In order to explore the feasibility, to obtain the performance, and to verify the design results of a micro radial turbine, this paper mainly presents the investigation on overall performance of a micro radial turbine with 10 mm diameter for 50W-class micro gas turbine by the cold model test. Firstly, the aerodynamic performance test platform for high speed micro radial turbine was exhibited. Then, the feasibility and overall performance test of micro radial turbine was carried out. At present, the rotational speed of micro radial turbine has achieved at 359,900 rpm by using hydrostatic gas bearing, which is approximately 80% rotational speed of the design point in cold model test. Thirdly, based on the experimental data and numerical simulation, the operating performance and overall performance of the micro gas turbine were analyzed and discussed in details. The final results indicate that the feasibility of the millimeter-scale micro radial turbine with 10 mm diameter has partly been proven at present level and the micro radial turbine system need to be further improved. These works not only obtain the some valuable experimental data, but also accumulate experience of micro radial turbine design. And this paper not only exhibits the test and design results as engineering reference, but also presents the operation problems and its potential solutions of ultra-high rotational speed experiment and performance test of a micro radial turbine.