Abstract Improving the comprehension of turbomachinery fluid-dynamics is vital to increase their performance and calls for the improvement of advanced instrumentation. In this context, novel data acquisition and data reduction techniques have been recently developed at Politecnico di Milano for turbulence measurements performed with FRAPP. These improvements address a gap in the capabilities of such probes, as turbulence data were among the few information they could provide only on a quality level. First, the technique is validated against hotwire measurements on a low-speed wind tunnel, where a combustor simulator is inserted. Second, the probe is applied in relevant sections of a single-stage axial turbine, thanks to its robustness and reliability also in a harsh flow environment, where the use of hot wires is critical. In this paper, the measured turbulence intensity using FRAPP is compared among three different operating conditions obtained by changing the rotor rotational speed. Furthermore, the paper explores the impact of nonuniform stage inlet conditions resembling the combustor outlet disturbances. The regions with the highest turbulence levels are observed in areas characterized by secondary flows, wakes and residual swirl profile. The stator-rotor interaction contributes to the turbulence generation both downstream of the stator and the rotor. Additionally, an increase in blade loading corresponds to higher intensity in secondary flows, leading to elevated turbulence levels at rotor exit. The injection of combustor non-uniformities has a diminished impact as the rotor load increases, given that the flow field becomes predominantly influenced by strong secondary flows.

Andrea Notaristefano

Giacomo Persico

Paolo Gaetani

Journal of Turbomachinery

The Journal of Turbomachinery publishes archival-quality, peer-reviewed technical papers that advance the state-of-the-art of turbomachinery technology related to gas turbine engines. The broad scope of the subject matter includes the fluid dynamics, heat transfer, and aeromechanics technology associated with the design, analysis, modeling, testing, and performance of turbomachinery. Emphasis is placed on gas-path technologies associated with axial compressors, centrifugal compressors, and turbines.

Topics: Aerodynamic design, analysis, and test of compressor and turbine blading; Compressor stall, surge, and operability issues; Heat transfer phenomena and film cooling design, analysis, and testing in turbines; Aeromechanical instabilities; Computational fluid dynamics (CFD) applied to turbomachinery, boundary layer development, measurement techniques, and cavity and leaking flows.

The Journal of Turbomachinery publishes high-quality, peer-reviewed technical papers that advance the state-of-the-art in turbomachinery technology related to gas turbine engines. The journal covers a broad range of topics, including fluid dynamics, heat transfer, and aeromechanics technology associated with the design, analysis, modeling, testing, and performance of turbomachinery. Emphasis is placed on gas-path technologies related to axial compressors, centrifugal compressors, and turbines.\n\nTopics include: aerodynamic design, analysis, and testing of compressor and turbine blades; compressor stall, surge, and operability issues; heat transfer phenomena and film cooling design, analysis, and testing in turbines; aeromechanical instabilities; and computational fluid dynamics (CFD) applied to turbomachinery, boundary layer development, measurement techniques, and cavity and leaking flows.

《Journal of Turbomachinery》致力于发表高质量的、经过同行评审的技术论文，推动与燃气涡轮发动机相关的涡轮机械技术的最新进展。该期刊的主题范围广泛，包括与涡轮机械的设计、分析、建模、测试和性能相关的流体动力学、热传递和气动机械技术。特别强调与轴流压缩机、离心压缩机和涡轮相关的气流路径技术。\n\n研究主题包括：压缩机和涡轮叶片的气动设计、分析和测试；压缩机失速、涡旋和可操作性问题；涡轮中的热传递现象及膜冷却的设计、分析和测试；气动机械不稳定性；应用于涡轮机械的计算流体动力学（CFD）、边界层发展、测量技术以及腔体和泄漏流动。

Category	Quartile
工程技术	3
工程技术, 工程机械	3

Turbulence Measurements in Axial Turbines using Fast Response Aerodynamic Pressure Probes

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Journal Info

Category	Quartile
ENGINEERING, MECHANICAL	3