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Artículos de revistas sobre el tema "OGV (Outlet Guide Vanes)"

Autor: Grafiati
Publicado: 9 de noviembre de 2024
Última modificación: 31 de julio de 2025

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1

Wadia, A. R., P. N. Szucs, and K. L. Gundy-Burlet. "Design and Testing of Swept and Leaned Outlet Guide Vanes to Reduce Stator–Strut–Splitter Aerodynamic Flow Interactions." Journal of Turbomachinery 121, no. 3 (1999): 416–27. http://dx.doi.org/10.1115/1.2841334.

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Large circumferentially varying pressure levels produced by aerodynamic flow interactions between downstream stators and struts present a potential noise and stability margin liability in a compression component. These interactions are presently controlled by tailoring the camber and/or stagger angles of vanes neighboring the fan frame struts. This paper reports on the design and testing of a unique set of swept and leaned fan outlet guide vanes (OGVs) that do not require this local tailoring even though the OGVs are closely coupled with the fan frame struts and splitter to reduce engine lengt
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2

Jonsson, Isak, Valery Chernoray, and Radheesh Dhanasegaran. "Infrared Thermography Investigation of Heat Transfer on Outlet Guide Vanes in a Turbine Rear Structure." International Journal of Turbomachinery, Propulsion and Power 5, no. 3 (2020): 23. http://dx.doi.org/10.3390/ijtpp5030023.

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Aerothermal heat transfer measurements in fluid dynamics have a relatively high acceptance of uncertainty due to the intricate nature of the experiments. The large velocity and pressure gradients present in turbomachinery application add further complexity to the measurement procedure. Recent method and manufacturing development has addressed some of the primary sources of uncertainty in these heat transfer measurements. However, new methods have so far not been applied in a holistic approach for heat transfer studies. This gap is bridged in the present study where a cost-effective and highly
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3

Mårtensson, Hans. "Harmonic Forcing from Distortion in a Boundary Layer Ingesting Fan." Aerospace 8, no. 3 (2021): 58. http://dx.doi.org/10.3390/aerospace8030058.

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Integrating a fan with a boundary layer ingestion (BLI) configuration into an aircraft fuselage can improve propulsion efficiency by utilizing the lower momentum airflow in the boundary layer developed due to the surface drag of the fuselage. As a consequence, velocity and total pressure variations distort the flow field entering the fan in both the circumferential and radial directions. Such variations can negatively affect fan aerodynamics and give rise to vibration issues. A fan configuration to benefit from BLI needs to allow for distortion without large penalties. Full annulus unsteady co
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4

Barker, A. G., and J. F. Carrotte. "Compressor Exit Conditions and Their Impact on Flame Tube Injector Flows." Journal of Engineering for Gas Turbines and Power 124, no. 1 (1999): 10–19. http://dx.doi.org/10.1115/1.1383773.

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Within a gas turbine engine the flow field issuing from the compression system is nonuniform containing, for example, circumferential and radial variations in the flow field due to wakes from the upstream compressor outlet guide vanes (OGVs). In addition, variations can arise due to the presence of radial load bearing struts within the pre-diffuser. This paper is concerned with the characterization of this nonuniform flow field, prior to the combustion system, and the subsequent effect on the flame tube fuel injector flows and hence combustion processes. A mainly experimental investigation has
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5

Luo, Lei, Chenglong Wang, Lei Wang, Bengt Sundén, and Songtao Wang. "Endwall heat transfer and aerodynamic performance of bowed outlet guide vanes (OGVs) with on- and off-design conditions." Numerical Heat Transfer, Part A: Applications 69, no. 4 (2015): 352–68. http://dx.doi.org/10.1080/10407782.2015.1081021.

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6

Chikere, Aja O., Hussain H. Al-Kayiem, and Zainal Ambri A. Karim. "Thermal Diffusion Performance of a Diffuser by various Guide Vanes configurations." MATEC Web of Conferences 225 (2018): 03018. http://dx.doi.org/10.1051/matecconf/201822503018.

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The use of vane-less diffuser with large diffusion angle has shown a setback in the diffusion process of high temperature working fluids. The hot gas flow was characterized as a jet-like flow. This paper presents problem, encountered practically, using a vane-less diffuser with large diffusion angle and how the problem is solved by CFD simulation. The investigated thermal diffuser has a length of 0.3 m, an inlet to outlet crosssectional area ratio of 1:25 and diffusion angle of 115.44o. To resolve the jet-like flow problem and poor distribution of the flow temperature at the diffuser outlet, t
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7

Carrotte, J. F., K. F. Young, and S. J. Stevens. "Measurements of the Flow Field Within a Compressor Outlet Guide Vane Passage." Journal of Turbomachinery 117, no. 1 (1995): 29–37. http://dx.doi.org/10.1115/1.2835641.

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A series of tests have been carried out to investigate the flow in a Compressor Outlet Guide Vane (OGV) blade row downstream of a single-stage rotor. The subsequent flow field that developed within an OGV passage was measured, at intervals of 10 percent axial chord, using a novel design of miniature five-hole pressure probe. In addition to indicating overall pressure levels and the growth of regions containing low-energy fluid, secondary flow features were identified from calculated axial vorticity contours and flow vectors. Close to each casing the development of classical secondary flow was
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8

Zhu, Honggeng, and Rentian Zhang. "Numerical Simulation of Internal Flow and Performance Prediction of Tubular Pump with Adjustable Guide Vanes." Advances in Mechanical Engineering 6 (January 1, 2014): 171504. http://dx.doi.org/10.1155/2014/171504.

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Aiming at the performance defect of tubular pump with fixed guide vanes, a design scheme of tubular pump with adjustable guide vanes is proposed, so that the inlet setting angle of guide vanes can be flexibly adjusted to coordinate with the operation conditions of pump, to ensure the inlet setting angle of guide vanes changing with the outlet flow angle of the impeller. The three-dimensional time-averaged incompressible Navier-Stokes equations are adopted to numerically simulate the internal flow field of a tubular pump with fixed and adjustable guide vanes, respectively. Computed results indi
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9

Han, Fenghui, Zhe Wang, Yijun Mao, Jiajian Tan, and Wenhua Li. "Experimental and numerical studies on the influence of inlet guide vanes of centrifugal compressor on the flow field characteristics of inlet chamber." Advances in Mechanical Engineering 12, no. 11 (2020): 168781402097490. http://dx.doi.org/10.1177/1687814020974909.

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Inlet chambers (IC) are the typical upstream component of centrifugal compressors, and inlet guide vanes in the IC have a great impact on its internal flow and aerodynamic loss, which will significantly influence the performance of the downstream compressor stages. In this paper, an experimental study was carried out on the flow characteristics inside a radial IC of an industrial centrifugal compressor, including five testing sections and 968 measuring points for two schemes with and without guide vanes. Detailed distributions of flow parameters on each section were obtained as well as the ove
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10

Zhang, Huiyan, Fan Meng, Lei Cao, Yanjun Li, and Xinkun Wang. "The Influence of a Pumping Chamber on Hydraulic Losses in a Mixed-Flow Pump." Processes 10, no. 2 (2022): 407. http://dx.doi.org/10.3390/pr10020407.

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In this study, entropy generation theory based on computational fluid dynamics (CFD) is used to study the influence of a pumping chamber type (guide vane and volute scheme) on the spatial distribution of hydraulic loss in a mixed-flow pump. The CFD data of the mixed-flow pump with a volute is validated by external characteristic test data under Q = 561.4–1598.6 m3/h. The results show that the efficiency and the head of the guide vanes scheme are lower under Q = 800–1200 m3/h, which resulted from a higher total entropy production (TEP) in the pumping chamber and outlet pipe. The high total entr
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11

Harris, Jonah, Bharat Lad, and Sina Stapelfeldt. "Two-Dimensional Investigation of the Fundamentals of OGV Buffeting." International Journal of Turbomachinery, Propulsion and Power 7, no. 2 (2022): 13. http://dx.doi.org/10.3390/ijtpp7020013.

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The increased demands of compact modern aero engine architectures have highlighted the problem of outlet guide vane (OGV) buffeting in off-design conditions. This structural response to aerodynamic excitations is characterised by increased vibration, risking structural fatigue. Investigations focused on understanding, mitigation and avoidance are therefore of high priority. OGV buffet is a type of transonic buffet caused by unsteady shock movement, but the exact parameters driving it are not fully understood. To try and understand them, this paper examines the buffet of a quasi-2D OGV geometry
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12

Poudel, R., S. Chitrakar, Z. Qian, Z. Guo, and B. Thapa. "Experimental Investigations of Sediment Erosion in Guide Vanes of Francis Turbine." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012017. https://doi.org/10.1088/1755-1315/1411/1/012017.

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Abstract Guide vanes are the cascade of hydrofoil like structures surrounding the Francis turbine runner which guides the water from spiral casing and controls the flow to the turbine. A large portion of hydraulic energy of incoming flow is converted to kinetic energy within guide vanes. Sediment erosion causes deterioration of turbine components. Guide vanes are generally eroded due to sediments at the outlet region, facing plates, and clearance gap region. This research encompasses the study of erosion in guide vanes of a 2 kW capacity Francis turbine. The guide vanes were coated with four d
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13

Huang, Ping, Yajing Xiao, Jinfeng Zhang, Haikun Cai, and Haiqin Song. "The Influence of Flow Rates on Pressure Fluctuation in the Pump Mode of Pump-Turbine with Splitter Blades." Applied Sciences 10, no. 19 (2020): 6752. http://dx.doi.org/10.3390/app10196752.

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This paper takes a pump-turbine as the research subject and, based on the Computational Fluid Dynamics (CFD) numerical method and combined with test data, investigates the pressure fluctuation characteristics in the pump mode and analyzes the pressure fluctuation characteristics at 0.75 Qd, 1.0 Qd and 1.25 Qd when the guide vane opening is 17.5°. The results showed that the protruding frequencies of pressure fluctuation in the bladeless region were mainly 5 fn, 10 fn and 20 fn, and the main frequencies in the runner area and near the outlet wall of the draft tube were 16 fn and 5 fn, respectiv
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14

Ji, Dongtao, Weigang Lu, Bo Xu, Lei Xu, and Tao Jiang. "Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method." Journal of Marine Science and Engineering 11, no. 8 (2023): 1512. http://dx.doi.org/10.3390/jmse11081512.

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This study aimed to reveal the energy loss characteristics of each part of the shaft tubular pump device (STPD) under stall conditions. Numerical simulations were conducted by using the SST k-ω turbulence model with curvature correction, and the reliability of the simulation results was verified by a model test. The entropy production method was used to evaluate and visualize the energy loss. The results show that turbulent entropy production (TEP) is the main source of energy loss in each component of the STPD, and the TEP increases significantly with the deterioration of stall. The energy lo
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15

Al-Obaidi, Ahmed Ramadhan. "Influence of guide vanes on the flow fields and performance of axial pump under unsteady flow conditions: Numerical study." Journal of Mechanical Engineering and Sciences 14, no. 2 (2020): 6570–93. http://dx.doi.org/10.15282/jmes.14.2.2020.04.0516.

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Influence of different guide vanes on structural of flow field and axial pump performance under unsteady flow is carried out using numerical method. A three-dimensional axial flow pump model is numerically simulated using computational fluid dynamics (CFD) method with four number of impeller blades and 3, 4, 5 and 6 guide vanes depend on the SIMPLE code, standard turbulence k-ε model as well as sliding mesh method (SMM). The static, dynamic, total pressures, shear stress, velocity magnitude and turbulent kinetic energy are the important features which affecting instability operation in the pum
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16

Jiang, P. M., and A. Whitfield. "Investigation of Vaned Diffusers as a Variable Geometry Device for Application to Turbocharger Compressors." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 3 (1992): 209–20. http://dx.doi.org/10.1243/pime_proc_1992_206_179_02.

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The potential of guide vanes as a variable geometry device, placed in the conventional vaneless diffuser, to extend the operating range of a turbocharger compressor is investigated. Vaned diffusers are not normally employed in turbocharger applications as the consequent reduction in operating range is more damaging than the beneficial improvement in peak efficiency and pressure ratio. The variable geometry concept considered here is primarily one in which the guide vanes are introduced at the near surge flow conditions. The leading edge vane angle is set to accept the highly tangential flow at
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17

Lei, Zhijun, Hanliu Deng, Xiaoqing Ouyang, et al. "Numerical Research on the Jet Mixing Mechanism of the De-Swirling Lobed Mixer Integrated with OGV." Energies 16, no. 11 (2023): 4394. http://dx.doi.org/10.3390/en16114394.

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The outlet guide vane (OGV) is integrated with the lobed mixer to improve the exhaust system’s performance with a high core inlet swirl. The best location for integrating the OGV is along the central line of the lobe’s trough and near the exit plane of the lobed mixer. Two types of lobed mixers (the scalloped reference lobed mixer and the scalloped de-swirling lobed mixer) integrating with/without OGVs, are numerically researched under eight inlet swirl conditions ranging from 0° to 35°. The simulation used the Reynolds-Averaged Navier-Stokes (RANS) method with Shear Stress Transport (SST) mod
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18

Li, Wei, Mingjiang Liu, Leilei Ji, et al. "Research on the Matching Characteristics of the Impellers and Guide Vanes of Seawater Desalination Pumps with High Capacity and Pressure." Journal of Marine Science and Engineering 10, no. 1 (2022): 115. http://dx.doi.org/10.3390/jmse10010115.

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This paper presents the matching characteristics of impellers and guide vanes of high capacity and pressure seawater desalination pumps by using computational fluid dynamics (CFD). The single-stage pump is numerically calculated, and its external characteristics are consistent with the test results of model pump. Taking this scheme as a prototype, the research is carried out from three aspects: (i) the impeller blade outlet width; (ii) the number of impeller and guide vane blades; and (iii) the area ratio of impeller outlet to guide vane inlet. The results indicate that the blade outlet width
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19

Maatooq, Jaafar, and Zainab Zghaier. "Hydraulic performance of abrupt outlet transition structure with strip guide vanes at subcritical flow." MATEC Web of Conferences 162 (2018): 03009. http://dx.doi.org/10.1051/matecconf/201816203009.

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For some stream structures such as barrages, regulators, as well as change of channel cross section, the downstream expansion transitions structures are the common requirement. Eddies, as a result of the flow separation in such structures leads to destruction the bed and sides of the downstream channel. Head loss, on the other hand, produced through the expansion is important because it affects the stage at downstream. This study is restricted to developing the hydraulic performance of abrupt outlet transition at subcritical flow for both decreasing the head losses besides spreading the flow t
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20

Meng, Fan, Yanjun Li, Jia Chen, Lei Xu, and Yalin Li. "The Effect of Airfoil Camber on Pressure Fluctuation in Bidirectional Axial-Flow Pump." Processes 10, no. 3 (2022): 468. http://dx.doi.org/10.3390/pr10030468.

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To obtain the influence of airfoil camber on the internal pressure fluctuation of a bidirectional axial-flow pump, the unsteady Reynolds time-averaged Navier–Stokes (URANS) equation was solved to predict the internal flow structure under three airfoil camber cases. The airfoil camber was quantitatively controlled by airfoil camber angle. The pressure standard deviation was used to define the local pressure fluctuation intensity (PFI) inside the impeller and guide vane. Fast Fourier transform was applied to analyze the frequency-domain characteristics of the pressure signal near the impeller–st
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21

Yang, Fan, Hao-ru Zhao, and Chao Liu. "Improvement of the Efficiency of the Axial-Flow Pump at Part Loads due to Installing Outlet Guide Vanes Mechanism." Mathematical Problems in Engineering 2016 (February 4, 2016): 1–10. http://dx.doi.org/10.1155/2016/6375314.

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In order to investigate the influence of adjustable outlet guide vane on the hydraulic performance of axial-flow pump at part loads, the axial-flow pump with 7 different outlet guide vane adjustable angles was simulated based on the RNG k-ε turbulent model and Reynolds time-averaged equations. The Vector graphs of airfoil flow were analyzed in the different operating conditions for different adjustable angles of guide vane. BP-ANN prediction model was established about the effect of adjustable outlet guide vane on the hydraulic performance of axial-flow pump based on the numerical results. The
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22

Horlock, J. H. "The Use of Circumferentially Varying Stagger Guide Vanes in an Axial Flow Pump or Compressor." Journal of Turbomachinery 112, no. 2 (1990): 294–97. http://dx.doi.org/10.1115/1.2927652.

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An actuator disk analysis is given of the flow through a guide vane and rotor combination. It is shown that changes in total pressure across the rotor are in general related to circumferential variations in guide vane outlet angle. In particular known variations in inlet total pressure may be eliminated by suitable circumferential changes in guide vane stagger.
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23

Witte, Hauke, Christoph Bode, and Jens Friedrichs. "Potential of Static Pressure Recovery of Rotor-Only Low-Pressure Axial Fans." International Journal of Turbomachinery, Propulsion and Power 8, no. 3 (2023): 33. http://dx.doi.org/10.3390/ijtpp8030033.

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Typically installed in a rotor-only configuration, low-pressure axial fans discharge directly into a free atmosphere and the discharge shows a strong swirl component. Since such designs, without guide vanes, cannot convert the dynamic pressure in the swirl component back into static pressure, the dynamic pressure is usually considered a loss. However, the radial equilibrium shows that a significant part of the kinetic energy contained in this swirl component is recovered as static pressure in the free atmosphere. This additional pressure increase has been sparsely researched. A comparison betw
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24

Ye, Changliang, Dongsen An, Wanru Huang, Yaguang Heng, and Yuan Zheng. "Investigation on Stall Characteristics of Centrifugal Pump with Guide Vanes." Water 15, no. 1 (2022): 21. http://dx.doi.org/10.3390/w15010021.

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Stall usually occurs in the hump area of the head curve, which will block the channel and aggravate the pump vibration. For centrifugal pumps with guide vanes usually have a clocking effect, the stall characteristic at different clocking positions should be focused. In this paper, the flow field of the centrifugal pump under stall conditions is numerically simulated, and the rotor–stator interaction effects of the centrifugal pump under stall conditions are studied. The double-hump characteristic is found in the head curve by using SAS (Scale Adaptive Simulation) model. The hump area close to
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25

Posson, Hélène, and Stéphane Moreau. "Effect of Rotor Shielding on Fan-Outlet Guide Vanes Broadband Noise Prediction." AIAA Journal 51, no. 7 (2013): 1576–92. http://dx.doi.org/10.2514/1.j051784.

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26

Sonoda, Toyotaka, and Heinz-Adolf Schreiber. "Aerodynamic Characteristics of Supercritical Outlet Guide Vanes at Low Reynolds Number Conditions." Journal of Turbomachinery 129, no. 4 (2006): 694–704. http://dx.doi.org/10.1115/1.2720868.

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As a part of an innovative aerodynamic design concept for a single stage low pressure turbine, a high turning outlet guide vane is required to remove the swirl from the hot gas. The airfoil of the vane is a highly loaded compressor airfoil that has to operate at very low Reynolds numbers (Re∼120,000). Recently published numerical design studies and experimental analysis on alternatively designed airfoils showed that blade profiles with an extreme front loaded pressure distribution are advantageous for low Reynolds number conditions. The advantage even holds true for an increased inlet Mach num
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27

Ngo, Tu Thien, Tianjun Zhou, Junho Go, Hap Van Nguyen, and Geun Sik Lee. "Improvement of the Steel-Plate Temperature During Preheating by Using Guide Vanes to Focus the Flame at the Outlet of a Gas Torch." Energies 12, no. 5 (2019): 869. http://dx.doi.org/10.3390/en12050869.

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The temperature distribution on a steel plate during a preheating process was comparedusing gas torch models with and without guide vanes. Numerical simulations were done usingANSYS FLUENT software, and experiments were done using thermal images obtained by aTVS-200EX infrared thermal camera. Liquefied petroleum gas (LPG) was used as fuel for the gastorch in the simulation and experiment. The temperature distribution on the steel plate and theflame region were first compared. The temperature increase caused by the flame concentrationwith the guide vanes was 65 C. The transient and steady-stat
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28

Xiao, Wei, Shaocheng Ren, Liu Chen, Bin Yan, Yilin Zhu, and Yexiang Xiao. "Analysis of the Flow Behavior and Pressure Fluctuation of a Pump Turbine with Splitter Blades in Part-Load Pump Mode." Energies 17, no. 10 (2024): 2402. http://dx.doi.org/10.3390/en17102402.

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The internal flow of a pump turbine is unstable in part-load pump mode for small guide-vane openings, and the strong vibration caused by pressure pulsation is related to the safe and stable operation of the unit. A pump turbine with a six-splitter-blade runner was chosen for unsteady simulation analyses. A standard k-epsilon turbulence model was adopted to study the unsteady flow and pressure pulsation in part-load pump mode. The predicted results show that the flow in the draft tube and the runner with splitter blades was relatively stable and the flow of the blade-to-blade channel was symmet
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29

Xu, Lei, Longcan Chen, Bo Zhu, et al. "Influence of Exit Setting Angle of Guide Vane on Bias Flow in Outlet Passage of Slanted Axial Flow Pump System." Journal of Marine Science and Engineering 13, no. 8 (2025): 1413. https://doi.org/10.3390/jmse13081413.

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A slanted axial-flow pump is extensively applied in coastal pumping stations; however, severe bias flow within the outlet passage will result in unstable operation and low efficiency of the slanted axial flow pump system. In order to mitigate bias flow in a slanted axial-flow pump outlet passage, seven exit setting angle schemes of the guide vanes were designed. The influence mechanisms of the guide vane exit setting angle on internal flow characteristics, hydraulic loss, flow deviation coefficient, vortex evolution patterns, and pump system efficiency were systematically investigated. The res
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30

Xu, Lei, Tao Jiang, Chuan Wang, et al. "Experiment and Numerical Simulation on Hydraulic Loss and Flow Pattern of Low Hump Outlet Conduit with Different Inlet Water Rotation Speeds." Energies 15, no. 15 (2022): 5371. http://dx.doi.org/10.3390/en15155371.

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The rotation speed of water at the inlet of the low hump outlet conduit has a great effect on its hydraulic performance. Therefore, the influence of different inlet water rotation speeds on hydraulic loss and flow pattern of low hump outlet conduit is studied in this paper. By solving RANS equations and the RNG k-ε turbulence model, the hydraulic loss and 3D flow field of the low hump outlet conduit were calculated under different inlet water rotation speeds. To verify the numerical results, the model tests of low hump outlet conduit with different guide vanes were conducted. The results show
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31

SHIBA, Masata, Masanori KUDO, Kotaro SATO, Kazuhiko YOKOTA, and Koichi NISHIBE. "Oscillation Characteristics of Flow Downstream of Annular Guide Vanes with an outlet Pipe." Proceedings of the Fluids engineering conference 2016 (2016): 0212. http://dx.doi.org/10.1299/jsmefed.2016.0212.

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32

Khaletskiy, Yu D., and Ya S. Pochkin. "Fan noise reduction of an aircraft engine by inclining the outlet guide vanes." Acoustical Physics 61, no. 1 (2015): 101–8. http://dx.doi.org/10.1134/s1063771014060098.

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33

OHASHI, Yuki, Masanori KUDO, Kotaro SATO, Kazuhiko YOKOTA, and Koichi NISHIBE. "1605 Flow Characteristics Downstream of Annular Inlet Guide Vanes with an Outlet Pipe." Proceedings of Conference of Hokuriku-Shinetsu Branch 2016.53 (2016): _1605–1_—_1605–5_. http://dx.doi.org/10.1299/jsmehs.2016.53._1605-1_.

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34

Cheng, Xiaorui, Boru Lv, Chenying Ji, Ningning Jia, and Dorah N. "Influence of Circumferential Placement Position of Guide Vanes on Performance and Dynamic Characteristics of Nuclear Reactor Coolant Pump." Mathematical Problems in Engineering 2020 (February 29, 2020): 1–12. http://dx.doi.org/10.1155/2020/3786745.

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In order to study the influence of the circumferential placement position of the guide vane on the flow field and stress-strain of a nuclear reactor coolant pump, the CAP1400 nuclear reactor coolant pump is taken as the research object. Based on numerical calculation and test results, the influence of circumferential placement position of the guide vane on the performance of the nuclear reactor coolant pump and stress-strain of guide vanes are analyzed by the unidirectional fluid-solid coupling method. The results show that the physical model and calculation method used in the study can accura
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35

Wang, Shicheng, Junhu Yang, and Guobin Xu. "Optimization of geometrical parameters of positive guide vane for multi-stage pump as turbine based on orthogonal test." Journal of Physics: Conference Series 2854, no. 1 (2024): 012059. http://dx.doi.org/10.1088/1742-6596/2854/1/012059.

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Abstract Multi-stage pumps as turbines (PAT) are commonly employed in the petrochemical, coal chemical, and other process industries to recover liquid residual pressure energy. This study focused on improving the performance of multi-stage PAT, specifically targeting the slope of the power-flow(P-Q) curve and hydraulic efficiency at the rated flow point. A two-stage PAT was selected as the research object for this study. According to the relationship between the power and the geometrical parameters of the positive guide vane derived based on the basic equation of the multi-stage PAT, four para
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36

Čudina, M. "Noise generation in vane axial fans due to rotating stall and surge." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 1 (2001): 57–64. http://dx.doi.org/10.1243/0954406011520517.

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A characteristic of axial flow fans is instabilities in their performance and noise in partial load operation. These instabilities are a consequence of rotating stall created in the rotor blade and/or in the guide vane cascade. At some operating conditions the rotating stall caused the appearance of a surge representing the lowest region of fan operating stability. The rotating stall and especially surge caused a steep increase in the emitted noise and lowered the performance of the fan. The present paper highlights the rotating stall generation phenomenon and its influence on the emitted tota
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37

Zhang, Huiyan, Fan Meng, Yunhao Zheng, and Yanjun Li. "The Cavitation-Induced Pressure Fluctuations in a Mixed-Flow Pump under Impeller Inflow Distortion." Machines 9, no. 12 (2021): 326. http://dx.doi.org/10.3390/machines9120326.

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To reduce cavitation-induced pressure fluctuations in a mixed-flow pump under impeller inflow distortion, the dynamic pressure signal at different monitoring points of a mixed-flow pump with a dustpan-shaped inlet conduit under normal and critical cavitation conditions was collected using high-precision digital pressure sensors. Firstly, the nonuniformity of the impeller inflow caused by inlet conduit shape was characterized by the time–frequency-domain spectra and statistical characteristics of pressure fluctuation at four monitoring points (P4–P7) circumferentially distributed at the outlet
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38

Jin, Weiya, Zijian Mao, Shuiqing Zhou, Tianle Zhang, Yinjie Hu, and Zhenghui Wu. "Research on Multi-Optimal Project of Outlet Guide Vanes of Nuclear Grade Axial Flow Fan Based on Sensitivity Analysis." Applied Sciences 12, no. 6 (2022): 3029. http://dx.doi.org/10.3390/app12063029.

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Nuclear grade axial flow fans are widely used in nuclear power plants for ventilation and heat dissipation and have the advantages of high efficiency and high flow rates. A nuclear grade axial flow fan with OGVs (outlet guide vanes) can recover the kinetic energy of the dynamic impeller outlet winding to increase the ventilator pressure, thus improving the ventilator efficiency; therefore, the OGVs play an essential role in the performance of the axial flow fan. Based on accurate numerical simulations, an MRGP approximation model was developed to analyse the factors affecting the OGVs duct and
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39

Song, Wei, Jilong Lin, Yonggang Lu, Yun Zhao, and Zhengwei Wang. "Study of Inlet Vortex Behavior in Dual-Pump Systems and Its Influence on Pump Operational Instability." Water 17, no. 12 (2025): 1784. https://doi.org/10.3390/w17121784.

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This study addresses inlet flow distribution and pressure pulsation-induced vibration in LNG dual-pump parallel systems. We investigate an LNG dual-submerged pump tower system. Our approach combines computational fluid dynamics with vortex dynamics theory. We examine inlet flow characteristics under different flow conditions. Pressure pulsation propagation patterns are analyzed. System stability mechanisms are investigated. A 3D model incorporates inducers, impellers, guide vanes, outlet sections, and base structures. The SST k-ω turbulence model and Q-criterion vortex identification reveal ke
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40

Sznajder, Janusz. "Simulations of Hot-Gas Flow in Internally Cooled Cascade of Turbine Vanes." Journal of KONES 26, no. 2 (2019): 151–58. http://dx.doi.org/10.2478/kones-2019-0044.

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Abstract An experiment in cooling of gas turbine nozzle guide vanes was modelled numerically with a conjugate viscous-flow and solid-material heat conduction solver. The nozzle vanes were arranged in a cascade and operated in high-pressure, hot-temperature conditions, typical for first turbine stage in a flow of controlled-intensity, artificially-generated turbulence. The vane cooling was internal, accomplished by 10 channels in each vane with cooling-air flow. Numerical simulations of the experiment were conducted applying two turbulence models of the k-omega family: k-omega-SST and Transitio
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41

Lewis, Danny, Stéphane Moreau, Marc C. Jacob, and Marlène Sanjosé. "ACAT1 Fan Stage Broadband Noise Prediction Using Large-Eddy Simulation and Analytical Models." AIAA Journal 60, no. 1 (2022): 360–80. https://doi.org/10.2514/1.j060163.

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The present paper deals with the assessment of the turbulent flow through and the noise radiation of the ACAT1 fan stage, which was tested in the framework of the European project TurbonoiseBB. It aims at analyzing and predicting the broadband noise resulting from the impact of the fan wakes onto the outlet guide vane (OGV) at approach condition. This is achieved via a large-eddy simulation (LES) of the full fan-OGV stage that is in good agreement with the mean flow measurements. Some disparities regarding the turbulent content of the flow are, however, highlighted. The main flow features and
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42

Acharya, N., S. Gautam, S. Chitrakar, C. Trivedi, and O. G. Dahlhaug. "Application of hydro-abrasive erosion model from IEC 62364:2019 standard in Francis turbines." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012008. http://dx.doi.org/10.1088/1755-1315/1079/1/012008.

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Abstract Hydro-abrasive erosion in hydraulic turbines is critical and one of the prominent issue due to its association with maintenance costs and production losses in the hydropower plant. IEC 62364:2019* standard guide focuses mainly on hydroelectric powerplant equipment and provides the standard on particle abrasion rates on several combinations like operating conditions, component materials properties, water quality among many factors. With the consideration of different critical parameters, a theoretical model of abrasion rate on hydraulic turbines is proposed by IEC 62364:2019. Present s
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43

Zhang, Ling, Peng Jie Huang, Hai Qiang Li, and Yun Peng Diao. "CFD Analysis of Impeller Internal Flow Field in Multistage Pump with Inducer." Advanced Materials Research 1070-1072 (December 2014): 1937–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1937.

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Based on the three-dimensional Reynolds-Averaged N-S equations and the standard k-ε turbulence model, the inner flow of a multistage vane water centrifugal pump was simulated. The distribution law of inner flow was analyzed by using the SIMPLEC algorithm and multiple reference frame (MRF) model provided by CFD software Fluent. The pressure and velocity distribution law in impeller and vane diffuser are obtained. Results indicated that the lowest pressure area , where cavitation was easy to occur, was in the inlet of the first impeller blade back. There is reverse flow in outlet of impeller. An
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44

Polacsek, C., A. Cader, M. Buszyk, R. Barrier, F. Gea-Aguilera, and H. Posson. "Aeroacoustic design and broadband noise predictions of a fan stage with serrated outlet guide vanes." Physics of Fluids 32, no. 10 (2020): 107107. http://dx.doi.org/10.1063/5.0020190.

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45

Roger, Michel, and Benjamin François. "Combined analytical models for sound generation and transmission in cambered axial-flow outlet guide vanes." European Journal of Mechanics - B/Fluids 61 (January 2017): 218–25. http://dx.doi.org/10.1016/j.euromechflu.2016.10.006.

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46

Zhai, Lulu, Chao Lu, Jia Guo, Zuchao Zhu, and Baoling Cui. "Flow Characteristics and Energy Loss of a Multistage Centrifugal Pump with Blade-Type Guide Vanes." Journal of Marine Science and Engineering 10, no. 2 (2022): 180. http://dx.doi.org/10.3390/jmse10020180.

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Multistage pumps with blade-type guide vanes are widely used in offshore oil production, the petrochemical and coal-chemical industries, and nuclear power fields for its advantages of large flow rate, high pressure, and excellent operation stability. However, the internal flow of this kind of pump is complex; in particular, the hydraulic, flow, and pressure pulsation characteristics of the different stages are quite different, which has a great impact on the design and performance predictions of this kind of pump. Thus, in this paper, the hydraulic performance, unsteady flow characteristics, e
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47

Liu, Zhen, Xiangyuan Zhu, Jiying Liu, Moon Keun Kim, and Wei Jiang. "A Numerical Investigation of the Influence of Diffuser Vane Height on Hydraulic Loss in the Volute for a Centrifugal Water Supply Pump." Buildings 14, no. 8 (2024): 2296. http://dx.doi.org/10.3390/buildings14082296.

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The energy efficiency of water supply systems in high-rise residential buildings has become a significant concern for sustainable development in recent times. This work presents a numerical investigation on the influence of diffuser vane height on flow variation and hydraulic loss in the volute for a water supply centrifugal pump. Experiments and numerical simulations were conducted with four different vane height ratios. The numerical results were validated against experimental data. The hydraulic losses of different flow components were numerically evaluated at varying guide vane blade heigh
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48

Pandey, A., S. Gautam, S. Chitrakar, N. Acharya, and P. L. Bijukchhe. "Numerical Investigation of Flow Behaviour and Erosion Potential in the Side-Wall Clearance Between Guide Vane and Runner." IOP Conference Series: Materials Science and Engineering 1279, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1757-899x/1279/1/012009.

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Abstract In the hydropower plants exposed to excessive sediment concentration, the components of Francis turbines, especially the regions of Guide Vanes (GVs) and Runner Vanes (RVs) are severely eroded. The side-wall clearance between GV and runner is present in these turbines to separate the rotating and stationary components. The height difference between the runner inlet and GV outlet covers, introduced during the fabrication or assembly process might play a crucial role in accelerating the erosion process in these components. This study is focused on numerical analysis of simplified geomet
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49

Górecki, Jan, Kliment Klimentov, Gencho Popov, Boris Kostov, and Salaf Ibrahim. "Studying the Impact of Diffuser Return Guide Vanes on the Energy Performance of a Multistage Centrifugal Pump." Applied Sciences 14, no. 23 (2024): 10991. http://dx.doi.org/10.3390/app142310991.

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The head, efficiency, and cavitation characteristics of centrifugal pumps are highly dependent on the velocity field in front of the impeller inlet. In multistage pumps, the velocity field in front of the second and each subsequent stage is determined by the shape (design) of the diffuser return guide vanes. This current work presents the results obtained by performing a numerical study using ANSYS CFX 14.0 to determine the impact of the shape (design) of diffuser return guide vanes on the head and coefficient of efficiency of one stage of a multistage centrifugal pump. Three RGVs with differe
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50

Sahu, Rohit, Sandeep Kumar, and Bhupendra K. Gandhi. "Design and Development of Guide Vane Cascade Test Rig." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012016. https://doi.org/10.1088/1755-1315/1411/1/012016.

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Abstract Flow instabilities around guide vanes of the Francis turbine directly contribute to the pressure pulsation, which is caused by rotor-stator interaction at the inlet of the runner. An experimental guide vane cascade rig is being developed at the Indian Institute of Technology Roorkee, whose flow field is set up to match the actual turbine’s. The test rig is designed for a maximum discharge of 0.06 m3/s in the closed loop, and provisions are made for particle image velocimetry to investigate the flow field around the clear plexi guide vane. Periodic walls of the flow channel between gui
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