The change of the inlet geometry of a centrifugal compressor stage and its influence on the compressor performance

Wang, Leilei; Yang, Ce; Zhao, Ben; Lao, Dazhong; Ma, Chaochen; Li, Du

doi:10.1007/s11630-013-0613-2

Cited by 23 publications

(21 citation statements)

References 5 publications

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“…While the effect of partial blade stall on compressor performance and efficiency is well known (specially in axial flow compressors) since at least the 1950s [8,9], pressure disturbances caused by these "marginal surge" conditions have also been linked to increased noise generation in the turbocharging system. These Noise, Vibration and Harshness (NVH) issues are specially challenging in the development of modern downsized engines [10].…”

Section: Introductionmentioning

confidence: 99%

Local flow measurements in a turbocharger compressor inlet

Torregrosa

Broatch

Margot

et al. 2017

Experimental Thermal and Fluid Science

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This paper describes an experimental study carried out with the objective of characterizing flow instabilities in turbocharger compressors, specially the distribution of the high-temperature compressed backflow that appears upstream of the impeller at marginal surge conditions. The inlet of a test compressor was fitted with linear and circumferential thermocouple arrays in order to measure the temperature distribution caused by this backflow, whose independence of duct wall temperature was validated through thermographic imaging. Miniaturized pressure probes at the inducer and diffuser showed how pressure spectra varied during the different operating conditions. Induct acoustic intensity was measured in both the inlet and the outlet to investigate the correlation between a known super-synchronous broadband issue known as whoosh noise and the backflow behaviour as characterized by local pressure and temperature. Analysis of the results points to inlet whoosh noise being boosted by this reversed flow but not caused by it, the source probably being located at or downstream of the compressor impeller.

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Section: Introductionmentioning

confidence: 99%

Local flow measurements in a turbocharger compressor inlet

Torregrosa

Broatch

Margot

et al. 2017

Experimental Thermal and Fluid Science

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“…Hereafter the results are discussed and validated by comparison with the pertinent experiments carried out in the CPRTF at Alta. Since the complex flow occurs in the inlet pipe [14][15][16][17], the influence of the location of the reference stations for the evaluation of the inducer hydraulic performance has been investigated by considering both local and mean values of the static pressure on the relevant inlet/outlet flow cross-sections (indicated above as positions 1, 2, and 3). In particular, with reference to Figure 6(a), four positions of the nominal inlet/outlet stations in the computational domain have been used:…”

Section: Resultsmentioning

confidence: 99%

Study on Hydraulic Performances of a 3-Bladed Inducer Based on Different Numerical and Experimental Methods

Fang

Yuan

et al. 2016

International Journal of Rotating Machinery

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The hydraulic performances of a 3-bladed inducer, designed at Alta, Pisa, Italy, are investigated both experimentally and numerically. The 3D numerical model developed in ANSYS CFX to simulate the flow through the inducer and different lengths of its inlet/outlet ducts is illustrated. The influence of the inlet/outlet boundary conditions, of the turbulence models, and of the location of inlet/outlet different pressure taps on the evaluation of the hydraulic performance of the inducer is analyzed. As expected, the predicted hydraulic performance of the inducer is significantly affected by the lengths of the inlet/outlet duct portions included in the computations, as well as by the turbulent flow model and the locations of the inlet/outlet pressure taps. It is slightly affected by the computational boundary conditions and better agreement with the test data obtained when adopting the k-ω turbulence model. From the point of the pressure tap locations, the pressure rise coefficient is much higher when the inlet/outlet static pressure taps were chosen in the same locations used in the experiments.

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“…运行中进口压力和温度等参数发生变化等等, 导致厂商所提供的压缩机性能曲线不能准确反映实际工况下的压缩机性能 [3] . 直接采用厂商所提供的性能曲线确定实际生产时压缩机的工作点会产生较大误差, 如Li等人 [4,5] [2,6,7] , 即对于两台离心压缩机来说, 如果保持 [8] . 这时只能从部分相似条件中找出某些联系, 再根据实际问题适当地补充一些条件, 使两机工况保持近似相似.…”

Section: 但是由于测试工况往往与实际运行工况有较大的差别如试验气体与实际输送气体往往不同或者实际unclassified