2016
Wang, Wenjie; Yuan, Shouqi; Pei, Ji; Pavesi, Giorgio; Gu, Yandong; Pei, Ji; Wang, Wenjie; Yuan, Shouqi; Pavesi, Giorgio
Experimental Investigation on Influence of Relative Positions between Diffuser and Volute on Pressure Fluctuation at the Outlet of a Centrifugal Pump Proceedings Article
In: ASME 2016 Fluid Engineering Division summer Meeting FEDSM2016, pp. 1-8, ASME, 2016, ISSN: 08888116.
Abstract | Links | BibTeX | Tags: Diffuser, Pump, Volute
@inproceedings{Pavesi2016a,
title = {Experimental Investigation on Influence of Relative Positions between Diffuser and Volute on Pressure Fluctuation at the Outlet of a Centrifugal Pump},
author = {Wenjie Wang and Shouqi Yuan and Ji Pei and Giorgio Pavesi and Yandong Gu and Ji Pei and Wenjie Wang and Shouqi Yuan and Giorgio Pavesi},
url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?doi=10.1115/FEDSM2016-7740},
doi = {10.1115/fedsm2016-7740},
issn = {08888116},
year = {2016},
date = {2016-01-01},
urldate = {2016-01-01},
booktitle = {ASME 2016 Fluid Engineering Division summer Meeting FEDSM2016},
volume = {1A-2016},
pages = {1-8},
publisher = {ASME},
abstract = {To investigate the influence of relative positions between a radial diffuser and an annular volute on the unsteady pressure at the centrifugal pump outlet, experiment tests were carried out with five positions between the diffuser and volute in an open test rig. Statistical and frequency spectrum analyses were carried out to obtain the pressure fluctuation amplitude range and the frequency domain respectively. The results showed that the relative position has greater influence on the pressure at large flow rate than at part load condition. The dominant frequency and the Power Spectrum Density (PSD) values are affected by diffuser azimuthal position and the harmonic frequencies are determined by number of blades and vanes. The investigation can give a reference to optimize the relative angle between diffuser and volute to reduce the pressure fluctuations.},
keywords = {Diffuser, Pump, Volute},
pubstate = {published},
tppubtype = {inproceedings}
}
To investigate the influence of relative positions between a radial diffuser and an annular volute on the unsteady pressure at the centrifugal pump outlet, experiment tests were carried out with five positions between the diffuser and volute in an open test rig. Statistical and frequency spectrum analyses were carried out to obtain the pressure fluctuation amplitude range and the frequency domain respectively. The results showed that the relative position has greater influence on the pressure at large flow rate than at part load condition. The dominant frequency and the Power Spectrum Density (PSD) values are affected by diffuser azimuthal position and the harmonic frequencies are determined by number of blades and vanes. The investigation can give a reference to optimize the relative angle between diffuser and volute to reduce the pressure fluctuations.
2015
Bayeul-Lainé, Annie-Claude; Dupont, Patrick; Cavazzini, Giovanna; Pavesi, Giorgio; Dazin, Antoine; Cherdieu, Patrick; Bois, Gérard; Roussette, Olivier
Comparisons RANS and URANS numerical results with experiments in a vaned diffuser of a centrifugal pump Journal Article
In: La Houille Blanche, iss. 2, pp. 108-116, 2015, ISSN: 0018-6368.
Abstract | Links | BibTeX | Tags: Diffuser, Vaneless diffusers
@article{pop00012,
title = {Comparisons RANS and URANS numerical results with experiments in a vaned diffuser of a centrifugal pump},
author = {Annie-Claude Bayeul-Lainé and Patrick Dupont and Giovanna Cavazzini and Giorgio Pavesi and Antoine Dazin and Patrick Cherdieu and Gérard Bois and Olivier Roussette},
url = {http://www.shf-lhb.org/10.1051/lhb/20150026 http://www.shf-lhb.org/articles/lhb/abs/2015/02/lhb20150026/lhb20150026.html},
doi = {10.1051/lhb/20150026},
issn = {0018-6368},
year = {2015},
date = {2015-01-01},
urldate = {2015-01-01},
journal = {La Houille Blanche},
issue = {2},
pages = {108-116},
publisher = {shf-lhb.org},
abstract = {The paper presents the analysis of the performance and the internal flow behaviour in the vaned diffuser of a radial flow pump using PIV (particles image velocimetry) technique, pressure probe traverses and numerical simulations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given rotational speed and various flow rates. For each operating condition, PIV measurements have been made for different angular positions of the impeller. Probe traverses have also been performed using a 3 holes pressure probe from hub to shroud diffuser width at different radial locations in between the two diffuser geometrical throats. The numerical simulations were realized with the two commercial codes: i-Star CCM+ 8.02.011 (RANS (Reynolds Averaged Navier Stokes) turbulence model, frozen rotor and unsteady calculations), ii-CFX 10.0 (turbulence modelled with DES model (Detached Eddy Simulation) combining RANS with LES (Large Eddy Simulation), unsteady calculations). Comparisons between numerical (fully unsteady calculations) and experimental results are presented and discussed for two flow rates. In this respect, the effects of fluid leakage due to the gap between the rotating and fixed part of the pump model are analysed and discussed.},
keywords = {Diffuser, Vaneless diffusers},
pubstate = {published},
tppubtype = {article}
}
The paper presents the analysis of the performance and the internal flow behaviour in the vaned diffuser of a radial flow pump using PIV (particles image velocimetry) technique, pressure probe traverses and numerical simulations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given rotational speed and various flow rates. For each operating condition, PIV measurements have been made for different angular positions of the impeller. Probe traverses have also been performed using a 3 holes pressure probe from hub to shroud diffuser width at different radial locations in between the two diffuser geometrical throats. The numerical simulations were realized with the two commercial codes: i-Star CCM+ 8.02.011 (RANS (Reynolds Averaged Navier Stokes) turbulence model, frozen rotor and unsteady calculations), ii-CFX 10.0 (turbulence modelled with DES model (Detached Eddy Simulation) combining RANS with LES (Large Eddy Simulation), unsteady calculations). Comparisons between numerical (fully unsteady calculations) and experimental results are presented and discussed for two flow rates. In this respect, the effects of fluid leakage due to the gap between the rotating and fixed part of the pump model are analysed and discussed.
2014
Bayeul-Lainé, Annie-Claude; Dupont, Patrick; Miccoli, L.; Cavazzini, Giovanna; Dazin, Antoine; Pavesi, Giorgio; Bois, Gérard
Fluid leakage effect on analysis of a vaned diffuser of SHF Proceedings Article
In: 15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2014, pp. 1-8, researchgate.net, 2014.
Abstract | Links | BibTeX | Tags: Diffuser, Leakage flow, Numerical calculations, Pump
@inproceedings{pop00015,
title = {Fluid leakage effect on analysis of a vaned diffuser of SHF},
author = {Annie-Claude Bayeul-Lainé and Patrick Dupont and L. Miccoli and Giovanna Cavazzini and Antoine Dazin and Giorgio Pavesi and Gérard Bois},
url = {https://www.researchgate.net/profile/Annie_Claude_Bayeul-Laine/publication/260420480_FLUID_LEAKAGE_EFFECT_ON_ANALYSIS_OF_A_VANED_DIFFUSER_OF_SHF_PUMP/links/00b7d5311e11635c23000000.pdf},
year = {2014},
date = {2014-01-01},
urldate = {2014-01-01},
booktitle = {15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2014},
pages = {1-8},
publisher = {researchgate.net},
abstract = {The paper presents the results of numerical analysis on the local and global internal flow behaviour at the inlet of the vaned diffuser of a radial flow pump model, taking into account the effect of fluid leakages for various flow rates and a given rotation of speed. For each flow rate, numerical calculations were performed both with two different boundary conditions: - Without any leakage effects - With calculated leakage effects. The numerical simulations were realized with the two commercial codes: i-Star CCM+ 8.02.011 (at LML), ii-CFX 10.0 (at University of Padova). RANS unsteady calculations, with a k-? RNG model were performed with Star CCM+. Fully unsteady calculations of the whole pump were done with CFX with DES turbulent method (Cavazzini [1]). For each flow rate, different angular positions of the impeller are considered. First part of the paper shows global comparisons between numerical and experimental results already presented in ref [2-3], for which the effects of fluid leakage due to the gap between the rotating and fixed part of the pump model were found to be interesting to be analysed. Second part is devoted to the local comparisons of flow structures at the inlet section of the diffuser, without},
keywords = {Diffuser, Leakage flow, Numerical calculations, Pump},
pubstate = {published},
tppubtype = {inproceedings}
}
The paper presents the results of numerical analysis on the local and global internal flow behaviour at the inlet of the vaned diffuser of a radial flow pump model, taking into account the effect of fluid leakages for various flow rates and a given rotation of speed. For each flow rate, numerical calculations were performed both with two different boundary conditions: - Without any leakage effects - With calculated leakage effects. The numerical simulations were realized with the two commercial codes: i-Star CCM+ 8.02.011 (at LML), ii-CFX 10.0 (at University of Padova). RANS unsteady calculations, with a k-? RNG model were performed with Star CCM+. Fully unsteady calculations of the whole pump were done with CFX with DES turbulent method (Cavazzini [1]). For each flow rate, different angular positions of the impeller are considered. First part of the paper shows global comparisons between numerical and experimental results already presented in ref [2-3], for which the effects of fluid leakage due to the gap between the rotating and fixed part of the pump model were found to be interesting to be analysed. Second part is devoted to the local comparisons of flow structures at the inlet section of the diffuser, without
2013
Bayeul-Lainé, Annie-Claude; Dupont, Patrick; Cavazzini, Giovanna; Cherdieu, Patrick; Dazin, Antoine; Bois, Gérard; Roussette, Olivier
Comparison between numerical calculations and measurements in vaned diffuser of SHF impeller Journal Article
In: Journal of Drainage and Irrigation Machinery Engineering, vol. 31, iss. 12, pp. 1013-1019, 2013.
Links | BibTeX | Tags: Diffuser, Vaned diffuser
@article{Bayeul-Laine2013,
title = {Comparison between numerical calculations and measurements in vaned diffuser of SHF impeller},
author = {Annie-Claude Bayeul-Lainé and Patrick Dupont and Giovanna Cavazzini and Patrick Cherdieu and Antoine Dazin and Gérard Bois and Olivier Roussette},
url = {http://zzs.ujs.edu.cn/pgjx/CN/abstract/abstract1582.shtml},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {Journal of Drainage and Irrigation Machinery Engineering},
volume = {31},
issue = {12},
pages = {1013-1019},
keywords = {Diffuser, Vaned diffuser},
pubstate = {published},
tppubtype = {article}
}
2009
Pavesi, Giorgio; Cavazzini, Giovanna; Rossetti, Antonio; Ardizzon, Guido
A procedure for the design of radial cascade diffusers based on the maximum ratio between flow deflection and total pressure loss coefficient Journal Article
In: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, vol. 223, iss. 7, pp. 849-861, 2009, ISSN: 09576509.
Abstract | Links | BibTeX | Tags: Diffuser, Diffuser, Diffuser performance, Diffusion Factor, Radial cascade, Setting angle, Vaned diffuser
@article{Pavesi2009d,
title = {A procedure for the design of radial cascade diffusers based on the maximum ratio between flow deflection and total pressure loss coefficient},
author = {Giorgio Pavesi and Giovanna Cavazzini and Antonio Rossetti and Guido Ardizzon},
doi = {10.1243/09576509JPE643},
issn = {09576509},
year = {2009},
date = {2009-01-01},
urldate = {2009-01-01},
journal = {Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy},
volume = {223},
issue = {7},
pages = {849-861},
abstract = {A design procedure of radial cascade diffusers for incompressible flow, based on the maximum ratio between the flow deflection and the total pressure loss coefficient, is proposed. Toachieve such a result,numerical investigationswere carried outonseveral different diffusers at design and off-design operating conditions. Four space chord ratios, with seven blades and nine outletflowangleswere considered.For each diffuser, theoptimumperformanceparameterswere correlated to the incoming flow angle and the design variables of the aerofoil cascade. Reynolds number and mean camberline influence were also analysed. Design charts were then produced in order to attain an efficient preliminary design of aerodynamic diffusers without resorting to time-consuming approaches. Finally, auxiliary charts were proposed for predicting the diffuser performance at off-design operating conditions.},
keywords = {Diffuser, Diffuser, Diffuser performance, Diffusion Factor, Radial cascade, Setting angle, Vaned diffuser},
pubstate = {published},
tppubtype = {article}
}
A design procedure of radial cascade diffusers for incompressible flow, based on the maximum ratio between the flow deflection and the total pressure loss coefficient, is proposed. Toachieve such a result,numerical investigationswere carried outonseveral different diffusers at design and off-design operating conditions. Four space chord ratios, with seven blades and nine outletflowangleswere considered.For each diffuser, theoptimumperformanceparameterswere correlated to the incoming flow angle and the design variables of the aerofoil cascade. Reynolds number and mean camberline influence were also analysed. Design charts were then produced in order to attain an efficient preliminary design of aerodynamic diffusers without resorting to time-consuming approaches. Finally, auxiliary charts were proposed for predicting the diffuser performance at off-design operating conditions.
Rossetti, Antonio; Ardizzon, Guido; Pavesi, Giorgio; Cavazzini, Giovanna
An optimum design procedure for an aerodynamic radial diffuser with incompressible flow at different Reynolds numbers Journal Article
In: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, vol. 224, iss. 1, pp. 69-84, 2009, ISSN: 0957-6509.
Links | BibTeX | Tags: Diffuser, Diffuser performance, Radial cascade, Swarm Particle, Vaned diffuser
@article{Rossetti2009,
title = {An optimum design procedure for an aerodynamic radial diffuser with incompressible flow at different Reynolds numbers},
author = {Antonio Rossetti and Guido Ardizzon and Giorgio Pavesi and Giovanna Cavazzini},
doi = {10.1243/09576509JPE797},
issn = {0957-6509},
year = {2009},
date = {2009-01-01},
urldate = {2009-01-01},
journal = {Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy},
volume = {224},
issue = {1},
pages = {69-84},
keywords = {Diffuser, Diffuser performance, Radial cascade, Swarm Particle, Vaned diffuser},
pubstate = {published},
tppubtype = {article}
}
