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Готові списки джерел за темами / Inducer centrifugal stage / Статті в журналах

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Статті в журналах з теми "Inducer centrifugal stage"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Tkach, Pavlo, Andrii Yashchenko, Oleksandr Gusak, Sergey Khovanskyy, Vitalii Panchenko, and Iryna Grechka. "Improvement of cavitation erosion characteristics of the centrifugal inducer stage with the inducer bush." Eastern-European Journal of Enterprise Technologies 4, no. 8 (94) (2018): 24–31. http://dx.doi.org/10.15587/1729-4061.2018.139392.

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2

Rodgers, C. "Centrifugal Compressor Inlet Guide Vanes for Increased Surge Margin." Journal of Turbomachinery 113, no. 4 (1991): 696–702. http://dx.doi.org/10.1115/1.2929136.

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Анотація:

This paper describes the results of compressor rig testing with a moderately high specific speed, high inducer Mack number, single-stage centrifugal compressor, with a vaned diffuser, and adjustable inlet guide vanes (IGVs). The results showed that the high-speed surge margin was considerably extended by the regulation of the IGVs, even though the vaned diffuser was apparently operating stalled. Simplified one-dimensional analysis of the impeller and diffuser performances indicated that at inducer tip Mach numbers approaching and exceeding unity, the high-speed surge line was triggered by indu

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3

Li, Ziliang, Xingen Lu, Yanfeng Zhang, Ge Han, Chengwu Yang, and Shengfeng Zhao. "Numerical investigation of a highly loaded centrifugal compressor stage with a tandem bladed impeller." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 3 (2017): 240–53. http://dx.doi.org/10.1177/0957650917725406.

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This study numerically investigated a highly loaded centrifugal compressor stage with various tandem-designed impellers and a wedge diffuser using a state-of-the-art multi-block flow solver to better understand the fundamental mechanism of tandem impellers. The flow topologies in the impeller are analyzed in detail to identify the underlying physical mechanism of the effect of the tandem-impeller design on the performance of the compressor stage. Particular emphasis is placed on the evolution of the flow structure in the tandem bladed impeller by varying the inducer–exducer clocking arrangemen

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4

Palmer, D. L., and W. F. Waterman. "Design and Development of an Advanced Two-Stage Centrifugal Compressor." Journal of Turbomachinery 117, no. 2 (1995): 205–12. http://dx.doi.org/10.1115/1.2835648.

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This paper describes the aeromechanical design and development of a 3.3 kg/s (7.3 lb/sec), 14:1 pressure ratio two-stage centrifugal compressor, which is used in the T800-LHT-800 helicopter engine. The design employs highly nonradial, splitter bladed impellers with swept leading edges and compact vaned diffusers to achieve high performance in a small and robust configuration. The development effort quantified the effects of impeller diffusion and passive inducer shroud bleed on surge margin as well as the effects of impeller loading on tip clearance sensitivity and the impact of sand erosion a

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5

Shamsuddeen, Mohamed Murshid, Sang-Bum Ma, Sung Kim, et al. "Effect of an Inducer-Type Guide Vane on Hydraulic Losses at the Inter-Stage Flow Passage of a Multistage Centrifugal Pump." Processes 9, no. 3 (2021): 526. http://dx.doi.org/10.3390/pr9030526.

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A multistage centrifugal pump was developed for high head and high flow rate applications. A double-suction impeller and a twin-volute were installed at the first stage followed by an impeller, diffuser and return vanes for the next four stages. An initial design feasibility study was conducted using three-dimensional computational fluid dynamics tools to study the performance and the hydraulic losses associated with the design. Substantial losses in head and efficiency were observed at the interface between the first stage volute and the second stage impeller. An inducer-type guide vane (ITGV

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6

Koyyalamudi, V. V. N. K. Satish, and Quamber H. Nagpurwala. "Stall Margin Improvement in a Centrifugal Compressor through Inducer Casing Treatment." International Journal of Rotating Machinery 2016 (2016): 1–19. http://dx.doi.org/10.1155/2016/2371524.

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The increasing trend of high stage pressure ratio with increased aerodynamic loading has led to reduction in stable operating range of centrifugal compressors with stall and surge initiating at relatively higher mass flow rates. The casing treatment technique of stall control is found to be effective in axial compressors, but very limited research work is published on the application of this technique in centrifugal compressors. Present research was aimed to investigate the effect of casing treatment on the performance and stall margin of a high speed, 4 : 1 pressure ratio centrifugal compress

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7

Xu, Zhenfa, Fanyu Kong, Hongli Zhang, Kun Zhang, Jiaqiong Wang, and Ning Qiu. "Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions." Journal of Marine Science and Engineering 9, no. 11 (2021): 1240. http://dx.doi.org/10.3390/jmse9111240.

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Inducer is often used to improve the cavitation performance of pump. In order to study the cavitation characteristics of inducer under low flow condition of high-speed pump, high-speed photography technology was employed in this paper to carry out visual experiments on the inducer of a high-speed centrifugal pump. In low flow rates, Cavitation distribution and evolution among the inducer were captured. The experimental results revealed that a band-shaped backflow vortex in the inlet pipe would occur when the flow rate was less than 0.3 Qd. Moreover, the backflow vortex in the inlet pipe rotate

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8

Tkach, P. Y. "Influence of Geometric Parameters of Inducer Bush Design on Cavitation Erosion Characteristics of Centrifugal Inducer Stage of Pump." IOP Conference Series: Materials Science and Engineering 233 (August 2017): 012012. http://dx.doi.org/10.1088/1757-899x/233/1/012012.

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9

Li, Ziliang, Xingen Lu, Ge Han, Yanfeng Zhang, Shengfeng Zhao, and Junqiang Zhu. "The performance of a centrifugal compressor with a tandem impeller in off-design conditions." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 2 (2019): 156–72. http://dx.doi.org/10.1177/0957650919848614.

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Анотація:

Centrifugal compressors often suffer relatively low efficiency and a terrible operating range particularly due to the complex flow structure and intense impeller/diffuser interaction. Numerous studies have focused on improving the centrifugal compressor performance using many innovative ideas, such as the tandem impeller, which has become increasingly attractive due to its ability to achieve the flow control with no additional air supply configurations and control costs in compressor. However, few studies that attempted to the investigation of tandem impeller have been published until now and

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10

Kostornoi, Oleksandr, Valentyna Kucenko, Michail Laktionov, Pavlo Tkach, Nataliia Pidopryhora, and Тetiana Makhanova. "Experience in Selection of Cavitation-Resistant Steels for Inducers of Centrifugal Pumps of JSC "VNIIAEN" Specialization." Mechanics and Advanced Technologies 5, no. 1 (2021): 41–48. http://dx.doi.org/10.20535/2521-1943.2021.5.1.228965.

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Анотація:

To formulate the problems of increasing the resistance to cavitation erosion of the hydraulic parts of centrifugal pumps by selecting the most suitable steel grades and to review the experience of using cavitation-resistant steels for inducers of centrifugal pumps of JSC “VNIIAEN” specialization. Analytical and statistical analyses were carried out using research and experimental development data of cavitation-resistant steels for inducers of centrifugal pumps at JSC "VNIIAEN", as well as using data from open access publications. The article deals with the problem of centrifugal pump hydraulic

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11

Cravero, Carlo, Philippe Joe Leutcha, and Davide Marsano. "Simulation and Modeling of Ported Shroud Effects on Radial Compressor Stage Stability Limits." Energies 15, no. 7 (2022): 2571. http://dx.doi.org/10.3390/en15072571.

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The design features of a centrifugal compressor must guarantee high performance and a wide operating range. The ported shroud was developed specifically to extend the operating limit. It is a passive flow control device based on a cavity for flow recirculation to avoid blade passage blocking in near surge conditions. A CFD simulation campaign using a simplified model identified the differences in the performance of the centrifugal compressor with ported shroud, compared to the baseline case. The use of a stability criterion to determine the limit mass flow rate, developed in a previous study b

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12

Li, Xiaojian, Yijia Zhao, Huadong Yao, Ming Zhao, and Zhengxian Liu. "A New Method for Impeller Inlet Design of Supercritical CO2 Centrifugal Compressors in Brayton Cycles." Energies 13, no. 19 (2020): 5049. http://dx.doi.org/10.3390/en13195049.

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Supercritical Carbon Dioxide (SCO2) is considered as a potential working fluid in next generation power and energy systems. The SCO2 Brayton cycle is advantaged with higher cycle efficiency, smaller compression work, and more compact layout, as compared with traditional cycles. When the inlet total condition of the compressor approaches the critical point of the working fluid, the cycle efficiency is further enhanced. However, the flow acceleration near the impeller inducer causes the fluid to enter two-phase region, which may lead to additional aerodynamic losses and flow instability. In this

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13

Bousquet, Yannick, Xavier Carbonneau, Guillaume Dufour, Nicolas Binder, and Isabelle Trebinjac. "Analysis of the Unsteady Flow Field in a Centrifugal Compressor from Peak Efficiency to Near Stall with Full-Annulus Simulations." International Journal of Rotating Machinery 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/729629.

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This study concerns a 2.5 pressure ratio centrifugal compressor stage consisting of a splittered unshrouded impeller and a vaned diffuser. The aim of this paper is to investigate the modifications of the flow structure when the operating point moves from peak efficiency to near stall. The investigations are based on the results of unsteady three-dimensional simulations, in a calculation domain comprising all the blade. A detailed analysis is given in the impeller inducer and in the vaned diffuser entry region through time-averaged and unsteady flow field. In the impeller inducer, this study de

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14

Lou, Fangyuan, John Charles Fabian, and Nicole Leanne Key. "Interpreting Aerodynamics of a Transonic Impeller from Static Pressure Measurements." International Journal of Rotating Machinery 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/7281691.

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This paper investigates the aerodynamics of a transonic impeller using static pressure measurements. The impeller is a high-speed, high-pressure-ratio wheel used in small gas turbine engines. The experiment was conducted on the single stage centrifugal compressor facility in the compressor research laboratory at Purdue University. Data were acquired from choke to near-surge at four different corrected speeds (Nc) from 80% to 100% design speed, which covers both subsonic and supersonic inlet conditions. Details of the impeller flow field are discussed using data acquired from both steady and ti

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15

Suh, Jun-Won, Hyeon-Mo Yang, Kyoung-Yong Lee, Jin-Hee Hong, and Young-Seok Choi. "A numerical investigation of cryogenic cavitation flow in LNG submerged pump." Journal of Physics: Conference Series 2217, no. 1 (2022): 012051. http://dx.doi.org/10.1088/1742-6596/2217/1/012051.

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Abstract The cryogenic centrifugal submersible pump is one of the core equipment of the technology and serves to pressurize and transport the fluid with the centrifugal force generated from the impeller by rotation. Due to the structural characteristics of the working fluid and multi-stage, problems such as cavitation and axial thrust negatively affect the life, noise, vibration, and performance of the pump, so it must be considered. For this reason, this research aimed to investigate a low-pressure LNG pump for an LNG fuel supply system with a general specific speed. The main components were

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16

Flete, Xavier, Nicolas Binder, Yannick Bousquet, Viviane Ciais, Sandrine Cros, and Nicolas Poujol. "Analysis and Prediction of the Stability Limit for Centrifugal Compressors with Vaneless Diffusers." International Journal of Turbomachinery, Propulsion and Power 9, no. 3 (2024): 29. http://dx.doi.org/10.3390/ijtpp9030029.

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A numerical study was conducted to identify the mechanisms involved in the destabilisation of centrifugal compressors with vaneless diffusers. A stability analysis—carried out on the rotating and fixed parts of the studied machines—showed that the vaneless diffuser is a limiting component at a low mass flow rate. It was demonstrated that the reorganisation of stall patterns into recirculation in the inducer stabilises the impellers’ flow fields. As the destabilisation of vaneless diffusers has been a recurrent topic in the literature, many models have shown that it is the inlet-flow angle that

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17

Higashimori, Hirotaka, Kiyoshi Hasagawa, Kunio Sumida, and Tooru Suita. "Detailed Flow Study of Mach Number 1.6 High Transonic Flow With a Shock Wave in a Pressure Ratio 11 Centrifugal Compressor Impeller." Journal of Turbomachinery 126, no. 4 (2004): 473–81. http://dx.doi.org/10.1115/1.1791645.

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Requirements for aeronautical gas turbine engines for helicopters include small size, low weight, high output, and low fuel consumption. In order to achieve these requirements, development work has been carried out on high efficiency and high pressure ratio compressors. As a result, we have developed a single stage centrifugal compressor with a pressure ratio of 11 for a 1000 shp class gas turbine. The centrifugal compressor is a high transonic compressor with an inlet Mach number of about 1.6. In high inlet Mach number compressors, the flow distortion due to the shock wave and the shock bound

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18

Hunziker, R., and G. Gyarmathy. "The Operational Stability of a Centrifugal Compressor and Its Dependence on the Characteristics of the Subcomponents." Journal of Turbomachinery 116, no. 2 (1994): 250–59. http://dx.doi.org/10.1115/1.2928359.

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A centrifugal compressor was tested with three different diffusers with circular-arc vanes. The vane inlet angle was varied from 15 to 30 deg. Detailed static wall pressure measurements show that the pressure field in the diffuser inlet is very sensitive to flow rate. The stability limit regularly occurred at the flow rate giving the maximum pressure rise for the overall stage. Mild surge arises as a dynamic instability of the compression system. The analysis of the pressure rise characteristic of each individual subcomponent (impeller, diffuser inlet, diffuser channel,...) reveals their contr

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19

Dickmann, Hans-Peter, Thomas Secall Wimmel, Jaroslaw Szwedowicz, Dietmar Filsinger, and Christian H. Roduner. "Unsteady Flow in a Turbocharger Centrifugal Compressor: Three-Dimensional Computational Fluid Dynamics Simulation and Numerical and Experimental Analysis of Impeller Blade Vibration." Journal of Turbomachinery 128, no. 3 (2005): 455–65. http://dx.doi.org/10.1115/1.2183317.

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Experimental investigations on a single stage centrifugal compressor showed that measured blade vibration amplitudes vary considerably along a constant speed line from choke to surge. The unsteady flow has been analyzed to obtain detailed insight into the excitation mechanism. Therefore, a turbocharger compressor stage impeller has been modeled and simulated by means of computational fluid dynamics (CFD). Two operating points at off-design conditions were analyzed. One was close to choke and the second one close to the surge line. Transient CFD was employed, since only then a meaningful predic

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20

Bario, F., L. Barral, and G. Bois. "Air Test Flow Analysis of the Hydrogen Pump of Vulcain Rocket Engine." Journal of Fluids Engineering 113, no. 4 (1991): 654–59. http://dx.doi.org/10.1115/1.2926530.

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Анотація:

Within the framework of the technological development of the VULCAIN rocket engine (Ariane V European project), initiated by the Centre National d’Etudes Spatiales (CNES) for the Agence Spatiale Europe´enne (ESA), the Socie´te´ Europe´enne de Propulsion (SEP) is in charge of the design and building of the liquid hydrogen turbopump. In order to characterize the hydraulic performance of the pump, an air test facility reproducing the pump geometry was built by SEP and fitted in the Laboratoire de Me´canique des Fluides et d’Acoustique of the Ecole Centrale de Lyon. Benefits and disadvantages of a

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21

Roberts, Douglas A., and Suresh C. Kacker. "Numerical Investigation of Tandem-Impeller Designs for a Gas Turbine Compressor." Journal of Turbomachinery 124, no. 1 (2001): 36–44. http://dx.doi.org/10.1115/1.1413472.

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Анотація:

The tandem-bladed impeller centrifugal compressor, which may offer potential aerodynamic benefits over conventional designs, is rarely employed in production gas turbine applications. Conventional impeller designs are often favored because of concerns for both significant performance losses and increased manufacturing costs associated with tandem configurations. In addition, much of the available literature concerning the characteristics of tandem-impellers is inconclusive, and at times contradictory. Because of the scarcity of tandem-impellers, rules for their design are nearly nonexistent. A

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22

Pylypenko, O. V., O. N. Nikolayev, N. V. Khoriak, S. I. Dolgopolov, and I. D. Bashliy. "Current problems in the low-frequency dynamics of liquid-propellant rocket propulsion systems." Technical mechanics 2021, no. 3 (2021): 9–22. http://dx.doi.org/10.15407/itm2021.03.009.

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One of the key problems in liquid-propellant rocket engine (LPRE) design is to provide the stability of LPRE working processes, in particular low-frequency stability. In LPRE experimental tryout, every so often there occur situations where the development of divergent oscillations set up in some of the LPRE loops or units results in contingencies: exceeding the engine ultimate strength, pump stall, chamber ignition, etc. Such contingencies may lead to grave consequences, including engine and bench equipment failure. Because of this, mathematical simulation is one of the main tools that allow o

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23

Koranteng Osman, Majeed, Wenjie Wang, Jianping Yuan, Jiantao Zhao, Yiyun Wang, and Jun Liu. "Flow loss analysis of a two-stage axially split centrifugal pump with double inlet under different channel designs." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 15 (2019): 5316–28. http://dx.doi.org/10.1177/0954406219843573.

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The double-stage axially split centrifugal pump is widely used in water diversion and water pumping stations due to their ability to deliver at high heads and large flow rate for long running hours. Their flow characteristics can be greatly influenced by the geometry of the channels between the stages, which is a prominent place for irreversible loss to occur. Numerical investigations were extensively carried out and a comparison was drawn between two multistage axially split centrifugal pumps, with different channel designs between its stages. The reliability of the numerical model was confir

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24

Gao, L., G. Xi, L. Zhou, and S. Wang. "Experimental and computational investigation of a centrifugal compressor stage." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 219, no. 1 (2005): 25–33. http://dx.doi.org/10.1243/095765005x6935.

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This paper presents experimental and computational investigations on a centrifugal compressor stage to study unsteady interaction flow and to verify the capability of computational fluid dynamics (CFD) codes. Detailed instantaneous flow has been measured at several different measuring positions using a hot-wire anemometer with the phase-locked ensemble-averaged technique. To describe quantitatively the unsteady effect induced from the impeller, an unsteady intensity is defined in this paper. Also, two computational investigations for the tested centrifugal compressor are performed and compared

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25

Wang, Wenke, Dengfeng Yang, Li Guo, et al. "Investigations on the Effect of Inclination Angle on the Aerodynamic Performance of a Two-Stage Centrifugal Compressor of a Proton Exchange Membrane Fuel Cell System." Energies 18, no. 12 (2025): 3199. https://doi.org/10.3390/en18123199.

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This study examines how leading-edge inclination angles affect a two-stage centrifugal compressor’s aerodynamic performance using numerical and experimental methods. Five impellers with varied inclination configurations were designed for both stages. The results show that negative inclination improves the pressure ratio and efficiency under near-choke conditions, with greater enhancements in the low-pressure stage. Positive inclination significantly boosts the pressure ratio and efficiency under near-stall conditions, particularly in the low-pressure stage. Negative inclinations optimize blade

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26

Li, Xiaojun, Tao Ouyang, Yanpi Lin, and Zuchao Zhu. "Interstage difference and deterministic decomposition of internal unsteady flow in a five-stage centrifugal pump as turbine." Physics of Fluids 35, no. 4 (2023): 045136. http://dx.doi.org/10.1063/5.0150300.

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Анотація:

A five-stage centrifugal pump is utilized to investigate the interstage flow characteristics of the multistage centrifugal pump as turbine (PAT). The simulation results of performance are verified by comparing with the experimental results. Owing to the distinct structural attributes, significant differences in flow occur between the first stage and the other stages of the multistage PAT. To enhance the understanding of these disparities and explore their repercussions, this study focuses on analyzing the flow within the impellers in the first and second stages by a deterministic analysis. The

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27

Mesias, Marta, Cristina Delgado-Andrade, Faver Gómez-Narváez, José Contreras-Calderón, and Francisco J. Morales. "Formation of Acrylamide and other Heat-Induced Compounds during Panela Production." Foods 9, no. 4 (2020): 531. http://dx.doi.org/10.3390/foods9040531.

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Non-centrifugal cane sugar (panela) is an unrefined sugar obtained through intense dehydration of sugarcane juice. Browning, antioxidant capacity (measured by ABTS (2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) assay and total phenolic content) and the formation of acrylamide and other heat-induced compounds such as hydroxymethylfurfural (HMF) and furfural, were evaluated at different stages during the production of block panela. Values ranged between below the limit of quantitation (LOQ)–890 µg/kg, < LOQ–2.37 mg/kg, < LOQ–4.5 mg/kg, 0.51–3.6 Abs 420 nm/g, 0.89–4.18 mg gallic a

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28

Sevchenko, S., M. Rublenko, and O. Bonkovsky. "Technologies for producing platelet masses for regenerative medicine." Naukovij vìsnik veterinarnoï medicini, no. 2(152) (December 17, 2019): 105–17. http://dx.doi.org/10.33245/2310-4902-2019-152-2-105-117.

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Анотація:

The development of regenerative medicine is to improve existing and to search for new tools for morphological and functional tissue repair, among which plasma or ﬁ brin enriched with platelets (PRP and PRF) can be signiﬁ cant. Autogenic platelet masses stimulate collagen synthesis, induce vascular growth, reduce pain, provide hemostasis, accelerate regeneration, reduce the risk of postoperative infectious and inﬂ ammatory complications, and also have powerful osteoinductive properties. Due to the ability to produce the majority of growth factors, platelets can aﬀ ect all stages of the inﬂ amma

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29

Tan, J., X. Wang, D. Qi, and R. Wang. "The effects of radial inlet with splitters on the performance of variable inlet guide vanes in a centrifugal compressor stage." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 9 (2011): 2089–105. http://dx.doi.org/10.1177/0954406211407799.

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Анотація:

Variable inlet guide vanes (VIGVs) can regulate pressure ratio and mass flow at constant rotational speed in centrifugal compressors as a result of inducing a controlled prewhirl in front of impellers. Radial inlets and VIGVs are typical upstream components in front of the first-stage impellers in many industrial centrifugal compressors. However, previous investigations on VIGVs in centrifugal compressors were mostly conducted under the condition of axial inlets, and this study aims to focus on the effects of radial inlet on the VIGVs performance of a centrifugal compressor stage. The axial in

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30

Назаренко, Г. В. "ВПЛИВ ПЕРЕПУСКНИХ ОТВОРІВ У ПРОВІДНОМУ ДИСКУ ВІДЦЕНТРОВОГО КОЛЕСА ШНЕКОВІДЦЕНТРОВОГО НАСОСА РРД НА ЙОГО НАПІР, ККД І КАВІТАЦІЙНІ ХАРАКТЕРИСТИКИ". System design and analysis of aerospace technique characteristics 30, № 1 (2022): 65–73. http://dx.doi.org/10.15421/472207.

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In modern rocket technology, liquid rocket engines (LRE) with a pump fuel supply system have become widespread. The pump is the heart of the engine, because it supplies the engine with fuel. When designing some pumps, there is a need for bypass holes in the drive disk of the centrifugal wheel. As part of the research, a comprehensive analysis of the pressure, efficiency and cavitation characteristics of the high-speed inducer-centrifugal pump of the upper stages of the TPA LREwas performed. The characteristics of the pumps were obtained experimentally. The oxidizer and fuel pumps of engi

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31

Shi, L., G. Chen, D. He, D. G. Bosc, D. W. Litchfield, and A. H. Greenberg. "Granzyme B induces apoptosis and cyclin A-associated cyclin-dependent kinase activity in all stages of the cell cycle." Journal of Immunology 157, no. 6 (1996): 2381–85. http://dx.doi.org/10.4049/jimmunol.157.6.2381.

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Abstract Granzyme B rapidly induces apoptosis in the presence of the pore-forming protein perforin. We have examined the cell cycle restriction of this apoptosis by separating Jurkat cells into fractions representing different stages of the cell cycle by centrifugal elutriation. Cells were susceptible to apoptosis from G1 through to G2/M, with no significant resistance detected at any stage. Similarly, cells arrested at G1/S or G2/M with either hydroxyurea or nocodazole were slightly more sensitive than asynchronously growing cells. Granzyme B induces Cdc2 kinase activity and requires its indu

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32

Wang, Yuqin, Jian Luo, Shuai Liu, Zhibo Han, and Xiaoqiang Ni. "Hydraulic optimization design of centrifugal pumps aiming at low vibration noise." AIP Advances 12, no. 9 (2022): 095026. http://dx.doi.org/10.1063/5.0111256.

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In order to reduce the vibration noise generated by the centrifugal pump in the working process and improve the working efficiency of the centrifugal pump, the sound field numerical calculation of IS80-65-160 single-stage single-suction centrifugal pump was carried out. Under the condition that the parameters of the pump body and the impeller remain unchanged, the number of blades of the prototype pump impeller was designed as 4, 5, 6, and 7, respectively. The flow-induced vibration and noise characteristics of centrifugal pumps were studied from two aspects of numerical simulation and test, a

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33

Wang, Shun, Gregor Idinger, and Wei Wu. "Centrifuge modelling of rainfall-induced slope failure in variably saturated soil." Acta Geotechnica 16, no. 9 (2021): 2899–916. http://dx.doi.org/10.1007/s11440-021-01169-x.

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AbstractThis paper presents the results of centrifuge tests on rainfall-induced instabilities in variably saturated slopes. The roles of rainfall intensity and initial conditions, such as slope angle, porosity and degree of saturation of the soil, in the failure initiation and postfailure kinematics are considered. The failure patterns, infiltration profile and deformation at prefailure and postfailure stages are characterized. The results indicate that rainfall-induced slope failures usually follow one of the following two failure modes, i.e. slide-to-flow and flowslide failure modes. The for

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34

Wang, Huaiyu, Dengfeng Yang, Zhengcan Zhu, Hongjie Zhang, and Qian Zhang. "Effect of Interstage Pipeline on the Performance of Two-Stage Centrifugal Compressors for Automotive Hydrogen Fuel Cells." Applied Sciences 13, no. 1 (2022): 503. http://dx.doi.org/10.3390/app13010503.

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At present, two-stage centrifugal compressors based on air bearing and high-speed motor technology are widely used in automotive hydrogen fuel cells. The low-pressure stage and high-pressure stage of the compressor are directly connected through an interstage pipeline, thus the structure of the interstage pipeline has an important influence on the aerodynamic performance of the compressor. In this work, a two-stage compressor with three different interstage pipelines were investigated experimentally and numerically. Results show that affected by the interstage pipeline bend section, the flow d

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35

Wang, Kai, Chengbin Wang, Chen Xia, Houlin Liu, and Zixu Zhang. "Experimental Measurement of Cavitation-Induced Vibration Characteristics in a Multi-Stage Centrifugal Pump." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 51, no. 3 (2018): 203–9. http://dx.doi.org/10.1252/jcej.17we191.

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36

Wang, S., G. Idinger, and W. Wu. "Centrifuge modelling of rainfall-induced slope failure in variably saturated soil." Acta Geotechnica 16 (March 11, 2021): 2899–916. https://doi.org/10.1007/s11440-021-01169-x.

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Анотація:

This paper presents the results of centrifuge tests on rainfall-induced instabilities in variably saturated slopes. The roles of rainfall intensity and initial conditions, such as slope angle, porosity and degree of saturation of the soil, in the failure initiation and postfailure kinematics are considered. The failure patterns, infiltration profile and deformation at prefailure and postfailure stages are characterized. The results indicate that rainfall-induced slope failures usually follow one of the following two failure modes, i.e. slide-to-flow and flowslide failure modes.

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37

Zheng, Xinqian, Yun Lin, and Zhenzhong Sun. "Effects of volute’s asymmetry on the performance of a turbocharger centrifugal compressor." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 7 (2016): 1235–46. http://dx.doi.org/10.1177/0954410016670418.

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The effects of the volute’s asymmetry on the performance of a turbocharger centrifugal compressor were studied using steady simulations and theoretical analysis. According to the steady simulation results, it is found that the volute’s asymmetry has significant influence on the performance of the centrifugal compressor. The variation of the stage efficiency due to volute’s asymmetry is up to 4%. Meanwhile, the volute’s asymmetry restricts the compressor stable flow range by imposing a distorted outlet pressure condition and forcing some certain impeller passages to suffer from a worse flow tha

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38

Han, Fenghui, Zhe Wang, Yijun Mao, Jiajian Tan, and Wenhua Li. "Flow Control of Radial Inlet Chamber and Downstream Effects on a Centrifugal Compressor Stage." Applied Sciences 11, no. 5 (2021): 2168. http://dx.doi.org/10.3390/app11052168.

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Radial inlet chambers are widely used in various multistage centrifugal compressors, although they induce extra flow loss and inlet distortions. In this paper, the detailed flow characteristics inside the radial inlet chamber of an industrial centrifugal compressor have been numerically investigated for flow control and performance improvement. First, the numerical results are validated against the experimental data, and flow conditions inside the inlet chambers with different structures are compared. They indicate that, in the non-guide vane scheme, sudden expansions, tangential flows and flo

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39

Flathers, M. B., and G. E. Bache´. "Aerodynamically Induced Radial Forces in a Centrifugal Gas Compressor: Part 2—Computational Investigation." Journal of Engineering for Gas Turbines and Power 121, no. 4 (1999): 725–34. http://dx.doi.org/10.1115/1.2818533.

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Radial loads and direction of a centrifugal gas compressor containing a high specific speed mixed flow impeller and a single tongue volute were determined both experimentally and computationally at both design and off-design conditions. The experimental methodology was developed in conjunction with a traditional ASME PTC-10 closed-loop test to determine radial load and direction. The experimental study is detailed in Part 1 of this paper (Moore and Flathers, 1998). The computational method employs a commercially available, fully three-dimensional viscous code to analyze the impeller and the vo

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40

Celestino, Tarcísio B., Felipe P. M. Vitali, and Osvaldo P. M. Vitali. "The Milton Vargas Lecture 2023 - Shallow tunnels in cohesionless soils: ground behavior and building damage risks." Soils and Rocks 48, no. 2 (2025): e2025003225. https://doi.org/10.28927/sr.2025.003225.

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The demand for tunnels in densely populated urban areas is growing rapidly to address mobility challenges. Mechanized tunneling is widely adopted in urban environments due to its high productivity and the relatively small ground deformations it induces. However, urban tunneling is highly complex because of the typically shallow depths and interactions with aboveground structures. Therefore, accurately predicting ground deformations induced by mechanized tunneling at the design stage is crucial for assessing potential building damage. To investigate these deformations, a series of centrifuge tu

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41

Zhao, Peng-Fei, Yan Liu, and Xiao-Fang Wang. "Analysis of vortices and performance of different diffusers in a large mass flow coefficient centrifugal compressor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 231, no. 4 (2017): 253–73. http://dx.doi.org/10.1177/0957650917701339.

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An appropriate diffuser following an impeller is critical to realize a high efficiency and a wide operating range for a centrifugal compressor stage. The purpose of this study is to investigate the effect of different types of vaned diffusers on a large mass flow coefficient centrifugal compressor stage performance under different operating conditions and to reveal the loss mechanisms in the vaned diffusers. Five vaned diffusers are studied. Flow fields and vortices in a conventional diffuser and a rib diffuser are first examined. Then, vortices and flow fields in three different tandem diffus

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42

Shen, Xiaobo, Rennian Li, Wei Han, Shiqi Yang, Lu Bai, and Tao Yang. "Prediction of Progressive Erosion Characteristics of Centrifugal Pump Blades Based on Dynamic Boundaries." Journal of Physics: Conference Series 2854, no. 1 (2024): 012001. http://dx.doi.org/10.1088/1742-6596/2854/1/012001.

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Abstract The conventional method of fixed boundaries for predicting erosion inadequately reflects the erosion characteristics of centrifugal pumps under realistic operating conditions. In this research, we employ the dynamic boundary method, considering the influence of changes in wall morphology due to erosion on the flow field. We utilize the Euler-Lagrange approach and the E/CRC erosion model, incorporating a dynamic boundary geometry reconstruction strategy, to predict the erosion characteristics of the IS80-50-315 single-stage single-suction centrifugal pump. Solid-liquid two-phase flow c

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43

Zhang, Ning, Bo Gao, Zhong Li, and Qifeng Jiang. "Cavitating flow-induced unsteady pressure pulsations in a low specific speed centrifugal pump." Royal Society Open Science 5, no. 7 (2018): 180408. http://dx.doi.org/10.1098/rsos.180408.

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With the development of cavitation, the high-energy pressure wave from a cavitation bubble collapsing is detrimental to the stable operation of centrifugal pumps. The present paper concentrates on pressure pulsations under cavitation conditions, and pressure amplitudes at the blade-passing frequency ( f BPF ) and RMS values in the 0–500 Hz frequency band are combined to investigate cavitation-induced pressure pulsations. The results show that components at f BPF always dominate the pressure spectrum even at the full cavitation stage. For points P1–P7 on the volute side wall, with a decreasing

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44

You, F., and Q. Lan. "Study on Staged Start-up Mitigation Strategies for Water Hammer in Large-scale Centrifugal Pump Systems Based on One-dimensional and Three-dimensional Coupled Simulation." Journal of Applied Fluid Mechanics 18, no. 7 (2025): 1906–22. https://doi.org/10.47176/jafm.18.7.3179.

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In large-scale centrifugal pump systems, the conventional linear start-up method often induces significant instantaneous pressure peaks (commonly referred to as water hammer) at the pump outlet when the valve is initially opened. These pressure surges not only exceed the system's designed operational pressure but also exert substantial mechanical stress on critical components, such as the impeller, potentially disrupting the system's stability and reliability. This study investigated whether a staged start-up method can effectively minimize the instantaneous pressure peaks generated at the pum

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45

JIANG, Yu Yan, Shinobu YOSHIMURA, Ryuta IMAI, Hiroyuki KATSURA, Tetsuya YOSHIDA, and Chisachi KATO. "Simulation of the Flow-Induced Acoustic Vibration and Noise Generation in a Multi-Stage Centrifugal Pump." Transactions of the Japan Society of Mechanical Engineers Series C 72, no. 719 (2006): 2065–72. http://dx.doi.org/10.1299/kikaic.72.2065.

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46

Zhang, Jiwen, Jie Cao, Bo Li, Kunye Zhou, and Xilin Lü. "Centrifuge Model Test on the Settlement of Valley-Type Loess Filled after Construction and Subjected to Rainfall Infiltration." Advances in Civil Engineering 2021 (January 31, 2021): 1–11. http://dx.doi.org/10.1155/2021/8852623.

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With the rapid development of infrastructure construction in western China where hilly and gully areas are distributed, there are lots of large-scale filling engineering in recent years. In the area where collapsible loess is widely distributed, it is inevitable to use loess as filling material. Considering the collapsibility of loess, centrifuge model tests were conducted to study the settlement of loess fill in a valley after construction and subjected to rainfall infiltration. To provide a comparison, a centrifuge model test of loess filling body on a flat ground was conducted, and results

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47

Trébinjac, I., N. Bulot, and N. Buffaz. "Analysis of the flow in a transonic centrifugal compressor stage from choke to surge." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 225, no. 7 (2011): 919–29. http://dx.doi.org/10.1177/0957650911411537.

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Numerical and experimental investigations were conducted in a transonic centrifugal compressor stage composed of a backswept splittered unshrouded impeller and a vaned diffuser. Unsteady three-dimensional simulations were performed with the code elsA that solves the turbulent-averaged Navier–Stokes equations, at three operating points: choked flow, peak efficiency, and near surge. Numerical results were validated with experimental data coming from laser Doppler anemometry and unsteady pressure measurements. This article focuses on the change in flow structures when the operating point moves fr

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48

Fischer, B., M. Giller, and A. Neidel. "Failure of an impeller blade of a first stage air compressor." Practical Metallography 62, no. 5 (2025): 343–59. https://doi.org/10.1515/pm-2025-0028.

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Abstract Recurring failures affected the impeller of a steam turbine-driven integrally geared centrifugal air compressor in an oil refinery. In both incidents, part of the main blade of the stage #1 impeller liberated. The first incident occurred three years ago, when the subject compressor tripped. The second event happened a year later and is the subject of this contribution, when again the subject compressor tripped from stage #1 impeller damage. The impeller failure was caused by the liberation of one main blade due to high cycle fatigue failure. The high cycle fatigue crack might have bee

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49

Fu, Yong Zheng, Hui Hui Liu, Ya Qiao Cai, and Yang Jiao. "Flow Forecasting of the Regulation of Parallel Water Pumps with Variable Numbers." Advanced Materials Research 368-373 (October 2011): 3862–67. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.3862.

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For the closed loop water system, taking ISG single stage single suction centrifugal pumps for example, we calculate the flow of the single pump and the system, which is regulated by changing the number of parallel water pumps. According to the specific speeds, during the regulation, we induce the relations between the relative flow and the relative numbers of the single pump and the system, respectively. These relations can be applied to the flow forecasting of parallel water pumps with variable numbers in the closed loop water system.

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Kaya, Mehmet, and Haluk Erol. "Experimental investigation of cavitation-induced noise and vibration in a centrifugal pump." Noise Control Engineering Journal 70, no. 6 (2022): 497–506. http://dx.doi.org/10.3397/1/377043.

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Cavitation has become a serious concern threatening operational stability as the need for high-speed machinery has grown. In this study, noise (sound pressure level) and vibrations (structural) were measured in a radial flow centrifugal pump for design and off-design conditions under cavitation. Because the structure of a particular noise/vibration spectrum (as well as its total level) is affected by the operating conditions and stage of cavitation within the pump, a detailed analysis the noise/vibration spectra during the pumping process was carried out to detect of the cavitation phenomenon'

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