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首页> 外文期刊>International Review of Aerospace Engineering >Numerical and Experimental Studies of a Turbocharger Centrifugal Compressor for Combustion Engine Boost
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Numerical and Experimental Studies of a Turbocharger Centrifugal Compressor for Combustion Engine Boost

机译：内燃机增压涡轮增压离心压缩机的数值与实验研究

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Increasing efficiency and extending the stable operating range of a turbocharger centrifugal compressor for combustion engine boost is one way to improve engines economical operation indices. In order to increase the centrifugal compressor's efficiency, this work involves the numerical studies of the flow structure in the most widespread types of vaned diffusers: one-row, two-row, three-row, splitter and wedge diffuser. To confirm the adequacy of the numerical modeling results, the authors verified the design model and formulated recommendations on its settings to ensure the best correspondence between calculation results and experimental data. To extend the stable operating range of the centrifugal compressor, the authors performed numerical and experimental studies of casing treatments - ported shrouds and ring grooves in the shroud. The research findings demonstrated the high efficiency of the ported shroud, which allows the extension of the stable operating range by 4.5%. The authors carried out experimental studies of the influence of the centrifugal compressor diffuser type - vaned and vaneless - on the ported shroud efficiency. The displacement of the surge line is achieved in the configuration with the vaneless diffuser due to the implementation of the ported shroud is 10-12% greater than in the configuration with the vaned diffuser. The article is also of interest for designers of centrifugal compressors of turboshaft and small-sized turbojet engines, for which the problem of increasing the efficiency and extending the stable operating range of the compressor is also actual.
机译：用于内燃机增压的涡轮增压器离心压缩机的提高效率并扩展其稳定的工作范围是提高发动机经济运行指标的一种方法。为了提高离心式压缩机的效率，这项工作包括对最广泛的叶片式扩压器中的流动结构进行数值研究：单排，两排，三排，分流器和楔形扩压器。为了确认数值建模结果的充分性，作者验证了设计模型并就其设置提出了建议，以确保计算结果与实验数据之间的最佳对应。为了扩大离心式压缩机的稳定工作范围，作者对套管处理方法进行了数值和实验研究-套管中的带孔罩和环槽。研究结果表明，带孔导流罩具有很高的效率，可将稳定工作范围扩大4.5％。作者进行了实验研究，研究了离心式压缩机扩压器类型（叶片式和无叶片式）对端口护罩效率的影响。由于带孔罩的实现比带叶片扩散器的结构大10-12％，因此在无叶片扩散器的结构中实现了喘振线的位移。对于涡轮轴和小型涡轮喷气发动机的离心式压缩机的设计者而言，该文章也很有意义，对于这些设计者来说，提高效率和扩大压缩机的稳定工作范围的问题也是现实的。

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