Relevant bibliographies by topics / Vanes diffuser

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Vanes diffuser'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Vanes diffuser"

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Simon, H., T. Wallmann, and T. Mo¨nk. "Improvements in Performance Characteristics of Single-Stage and Multistage Centrifugal Compressors by Simultaneous Adjustments of Inlet Guide Vanes and Diffuser Vanes." Journal of Turbomachinery 109, no. 1 (1987): 41–47. http://dx.doi.org/10.1115/1.3262068.

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Nowadays, multistage geared centrifugal compressors are most often equipped with three-dimensional impellers and adjustable inlet guide vane cascades, at least upstream of the first stage. Optimum stage efficiencies are made possible by optimum axial in-flow into each stage and freely selectable pinion shaft speeds. Combined with intercooling of the medium, the result is high machine efficiency with good operating ranges. Additional increases in efficiency can be achieved by means of vaned diffusers. Due to the attendant restriction to the working range, this solution is not common in producti
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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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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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Nakagawa, Koji, Hiroshi Hayami, and Yuichi Keimi. "Comparison of Two Diffusers in a Transonic Centrifugal Compressor." International Journal of Rotating Machinery 9, no. 4 (2003): 279–84. http://dx.doi.org/10.1155/s1023621x03000253.

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Flow mechanisms suppressing the flow separation in two diffusers, a low-solidity cascade diffuser and a vaned diffuser with additional small vanes near the inlet, were compared mainly by numerical simulation. As the superiority of the low-solidity cascade diffuser was expected, a series of experiments was conducted using a transonic centrifugal compressor with a maximum pressure ratio of 7. The performance of the compressor with the vaned diffuser was comparable to that of the low-solidity cascade diffuser only between the surge point and the design flowrate at a pressure ratio of 3.5. The max
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Arndt, N., A. J. Acosta, C. E. Brennen, and T. K. Caughey. "Experimental Investigation of Rotor-Stator Interaction in a Centrifugal Pump With Several Vaned Diffusers." Journal of Turbomachinery 112, no. 1 (1990): 98–108. http://dx.doi.org/10.1115/1.2927428.

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This paper describes an experimental investigation of rotor-stator interaction in a centrifugal pump with several vaned diffusers. Steady and unsteady diffuser vane pressure measurements were made for a two-dimensional test impeller. Unsteady impeller blade pressure measurements were made for a second two-dimensional impeller with blade number and blade geometry identical to the two-dimensional impeller used for the diffuser vane pressure measurements. The experiments were conducted for different flow coefficients and different radial gaps between the impeller blade trailing edge and the diffu
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Takao, Shunya, Shinichi Konno, Shinichiro Ejiri, and Masahiro Miyabe. "Effect of diffuser vane slit on rotating stall behavior and pump performance in a centrifugal pump." Journal of Physics: Conference Series 2217, no. 1 (2022): 012054. http://dx.doi.org/10.1088/1742-6596/2217/1/012054.

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Abstract In the previous study of a centrifugal pump with a vaned diffuser, it was confirmed that the flowrate at the onset of rotating stall was shifted to the lower flowrate by slitting the diffuser vanes. As the CFD result, it was found that the jet flow from pressure-side to suction-side impinges backflow near the suction surface and it suppresses to expand toward the diffuser inlet. However, it is difficult to say that the optimized shape and slitting position have been sufficiently studied. Therefore, in this study, we investigated the effect of slitting on the pump performance and inter
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Yoshinaga, Y., T. Kaneki, H. Kobayashi, and M. Hoshino. "A Study of Performance Improvement for High Specific Speed Centrifugal Compressors by Using Diffusers With Half Guide Vanes." Journal of Fluids Engineering 109, no. 4 (1987): 359–66. http://dx.doi.org/10.1115/1.3242672.

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The experimental results from eighteen different centrifugal compressor stages showed that the pressure recovery of vaneless diffusers for high specific speed compressors was extremely low compared with the value expected by an ideal two-dimensional analysis. Consequently a new type of diffuser with half guide vanes on the shroud side wall was proposed. The pressure recovery of this diffuser at distorted inlet flow was considerably improved by the half guide vanes. The optimum height of the vanes was a little less than one half of the diffuser width. Measurements of the velocity distribution i
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Fu, Li, Ce Yang, Hang Zhang, Wenrui Bao, and Hanzhi Zhang. "Influence of vaned diffuser on the potential effect of volute and stall inception of centrifugal compressor." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 10-11 (2020): 2546–60. http://dx.doi.org/10.1177/0954407020916562.

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In the automotive turbochargers centrifugal compressor, the volute has a strong potential effect, leading to circumferential nonuniformity of the impeller flow field and compressor stall. In this study, full-annulus unsteady simulations for centrifugal compressors with vaned/vaneless diffusers are carried out. The influence of the diffuser vane on the potential effect of the volute and stall behavior of a centrifugal compressor is studied in detail. Based on the distribution of the casing static pressure, the formation mechanism of the circumferential distribution of static pressure and the re
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Sinha, Manish, and Joseph Katz. "Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—I: On Flow Structures and Turbulence." Journal of Fluids Engineering 122, no. 1 (1999): 97–107. http://dx.doi.org/10.1115/1.483231.

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Particle image velocimetry measurements are used to identify the unsteady flow structures and turbulence in a transparent centrifugal pump with a vaned diffuser. The experiments are being performed in a special facility that enables simultaneous measurements of the flow between the impeller blades, the gap between the impeller and the diffuser, between the diffuser vanes and in the volute. A custom-made 2 K×2 K digital camera with a unique digital image-shifting feature is used to record the images. For the measurements made close to design conditions, phase averaged velocity and vorticity fie
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Zhang, M., and H. Tsukamoto. "Unsteady Hydrodynamic Forces due to Rotor-Stator Interaction on a Diffuser Pump With Identical Number of Vanes on the Impeller and Diffuser." Journal of Fluids Engineering 127, no. 4 (2005): 743–51. http://dx.doi.org/10.1115/1.1949640.

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Experimental and computational study was developed for unsteady hydrodynamic forces on a diffuser pump impeller excited by the interaction between the impeller and the vaned diffuser with the same number of vanes as impeller. Unsteady flow calculations are made using commercially available CFD software, CFX-TASCflow, as well as the two-dimensional vortex method. Calculated pressure and fluid forces on the impeller show good agreement with measured ones. It has been demonstrated that the fluid forces on the impeller with the same number of vanes as the vaned diffuser are smaller compared with o
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Dissertations / Theses on the topic "Vanes diffuser"

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Young, Kim F. "The performance of compressor outlet guide vanes and downstream diffuser." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/13622.

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A large-scale compressor/diffuser test rig has been designed and constructed which,. together with an automated data acquisition system, permits more detailed and more accurate measurements than were previously possible - especially in the region of the compressor OGV's. Results are presented based on experiments carried out using two different single-stage axial-flow compressors operating immediately upstream of a straight-core annular diffuser, each compressor being tested with a conventional stator row and a double-dihedral chevron type of stator row i.e. four main configurations were inves
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Ольштынский, П. Л. "Учет особенностей рабочего процесса направляющего аппарата для повышения технического уровня центробежного насоса". Thesis, Сумский государственный университет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46026.

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У дисертаційній роботі запропоновано ефективний спосіб підвищення технічного рівня відцентрового насоса за рахунок застосування ступеня з мінімальним діаметральним відносним габаритом, що досягається шляхом використання напрямного апарата з переривчастою перевідною зоною. Основним змістом роботи є дослідження структури течії в елементах напрямного апарата, а також впливу геометричних елементів, що утворюють перевідну зону, на структуру потоку в перевідній зоні та зворотних каналах і на гідравлічні втрати. Дослідження впливу геометричних елементів, що утворюють перевідну зону, на структуру пото
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Lancel, Jerome. "Analysis and test of a centrifugal compressor." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250183.

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He, Ning. "Impeller diffuser interactions in high speed centrifugal compressors." Thesis, Cranfield University, 2001. http://dspace.lib.cranfield.ac.uk/handle/1826/11403.

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In the current research work, a computational analysis of a high-speed centrifugal compressor stage for turbocharger applications is presented. A detailed investigation about the interactions between backswept impeller and downstream vaneless and vaned diffusers is carried out. ' A unshrouded backswept impeller with splitters was combined with a vaneless diffuser or a number of different designs of vaned diffusers. The CFD solver CFX-TASCow was used. The three-dimensional Reynolds- Averaged Navier-Stokes equations are solved and a pressure correction method is employed to solve the system of e
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Pinarbasi, Ali. "Flow investigation in centrifugal compressor vaneless and vaned diffusers." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284261.

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Bitter, Jamin J. "One-Dimensional Performance Modeling of Centrifugal Flow Vaned Diffusers." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1711.pdf.

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Cherdieu, Patrick. "Contrôle du décollement dans un diffuseur aubé de turbomachine centrifuge." Thesis, Ecole centrale de Lille, 2013. http://www.theses.fr/2013ECLI0020/document.

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L'amélioration de la performance des turbomachines fonctionnant loin de leur point d'adaptation passe par la maîtrise des phénomènes instationnaires qui se produisent dans ces différents organes. L'étude présentée ici se concentre sur les interactions entre une roue de ventilateur centrifuge et son diffuseur. Elle vise, par des mesures de pression sur les différentes parois du diffuseur, ainsi que par des sondages dans les canaux inter-aubages à analyser finement ces phénomènes instationnaires et notamment les décollements fluctuants apparaissant sur les aubes à sur débit, et à mesurer leur in
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Akseraylian, Dikran. "A computational study of the 3D flow and performance of a vaned radial diffuser." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11182008-063206/.

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Phillips, Michael Stephen. "A computational investigation of the effects of inlet flow conditions on vaned diffuser performance." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/50299.

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Eynon, P. A. "Application of low solidity vaned diffusers for broad operating range turbocharger compressors." Thesis, University of Bath, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337823.

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Book chapters on the topic "Vanes diffuser"

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Prajapat, Deepak, Ruchi Khare, and Shyam N. Shukla. "Evaluation of the Effect of Diffuser Vanes on the Performance of Multistage Pump Using Numerical Simulation." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1033-1_5.

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Prajapat, Deepak, Ruchi Khare, and Shyam N. Shukla. "Numerical Simulation to Study the Influence of Number of Vanes of Diffuser on Performance of Multistage Pump." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9151-6_15.

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Rao, P. Venkateswara, G. V. Ramana Murty, and G. Venkata Rao. "CFD Analysis of Impeller-Diffuser Interaction in a Centrifugal Compressor with Twisted Vaned Diffuser." In Fluid Mechanics and Fluid Power – Contemporary Research. Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_86.

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Aunay, Céline, Magalie Guérit, and James Motteau. "La vaisselle en verre dans les territoires du centre de la Gaule, de la fin du iiie au milieu du ve siècle." In L’Antiquité tardive dans le centre et le centre-ouest de la Gaule (IIIe-VIIe siècles). Fédération pour l’édition de la Revue archéologique du Centre de la France, 2022. http://dx.doi.org/10.4000/12ph9.

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Cet article est l’occasion de présenter la vaisselle en verre utilisée et diffusée durant l’Antiquité tardive dans les territoires des cités gallo-romaines de Chartres, d’Orléans, de Tours et de Bourges, actuelles préfectures de la région Centre Val de Loire. La présentation des contextes de découvertes permettra d’évaluer dans un premier temps la proportion de vases découverts selon trois types de contexte, à savoir : urbain, rural et funéraires. Puis, nous proposerons une étude quantitative des vases en verre, présentés par formes pour amorcer l’esquisse d’un mode de consommation distinctif
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Chehhat, Abdelmadjid, Mohamed Si-Ameur, and Boussad Boumeddane. "Turbulent Air Flow Investigation Through the Vaned Diffuser Turbocharger Using CFD." In Exergy for A Better Environment and Improved Sustainability 1. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-62572-0_6.

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Pothuri, Venkateswara Rao, Venkata Ramana Murty Govindaraju, Amogh Baraar, and C. Pradeep Reddy. "Performance Study of a Twisted Vaned Diffuser in a Compressor Stage." In Lecture Notes on Multidisciplinary Industrial Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8468-4_8.

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Fourrier, Sabine. "Le bestiaire exotique de Chypre à l’âge du Fer." In Circulations animales et zoogéographie en Méditerranée. Publications de l’École française de Rome, 2024. https://doi.org/10.4000/12wdz.

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Le bestiaire de Chypre à l’âge du Fer est dominé par un nombre restreint de figures, omniprésentes : les bêtes à cornes (parmi lesquelles le taureau), le cheval et les oiseaux d’eau. Les animaux exotiques y sont extrêmement rares et le plus souvent isolés, à part le lion (et son dérivé monstrueux, le sphinx), dont l’image reproduit des modèles phéniciens. Encore faut-il noter que ces images ne sont pas diffusées sur tous les supports : leur quasi-absence parmi le répertoire coroplastique, art chypriote par excellence, est révélatrice. On s’intéresse ici à deux cas particuliers qui, malgré leur
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Wang, X. C., M. Y. Yang, X. Y. Wang, W. L. Li, Y. Liu, and C. Ma. "An investigation on influence of inlet elbow on performance of a centrifugal compressor with vaned diffuser." In 15th International Conference on Turbochargers and Turbocharging. CRC Press, 2023. http://dx.doi.org/10.1201/9781003429746-2.

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Toussaint, Michel, and François Hureau. "Analysis of Flow Measurements in the Impeller and Vaned Diffuser of a Centrifugal Pump Operating at Part Load." In Hydraulic Machinery and Cavitation. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_42.

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Kollmann, Karl, Calum E. Douglas, and S. Can Gülen. "Multistage Superchargers." In Turbo/Supercharger Compressors and Turbines for Aircraft Propulsion in WWII: Theory, History and Practice—Guidance from the Past for Modern Engineers and Students. ASME, 2021. http://dx.doi.org/10.1115/1.884676_ch6.

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The operating point where the compressor speed lines, and the engine’s operating line meet is critical. Thus, improvement of the efficiency at that point is of paramount importance. Through systematic development of the single-stage supercharger by (i) incremental improvements to the compressor impeller, (ii) the arrangement and development of the diffuser vanes, and (iii) the shape of the outer volute/spiral, significant gains in the performance of the single-stage compressor have been made.
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Conference papers on the topic "Vanes diffuser"

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Morita, Yohei, Nobumichi Fujisawa, Takashi Goto, and Yutaka Ohta. "Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor." In ASME 2013 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fedsm2013-16145.

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The effects of the diffuser vane geometries on the compressor performance and noise characteristics of a centrifugal compressor equipped with vaned diffusers were investigated by experiments and numerical techniques. Because we were focusing attention on the geometries of the diffuser vane’s leading edge, diffuser vanes with various leading edge geometries were installed in a vaned diffuser. A tapered diffuser vane with the tapered portion near the leading edge of the diffuser’s hub-side could remarkably reduce both the discrete frequency noise level and broadband noise level. In particular, a
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Kmecl, Tomaz, and Peter Dalbert. "Optimization of a Vaned Diffuser Geometry for Radial Compressors: Part I — Investigation of the Influence of Geometry Parameters on Performance of a Diffuser." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-437.

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In the present investigation the influence of different diffuser geometry parameters on the stage efficiency and operating range of radial compressor stages has been studied. In addition to a parallel-walled vaneless diffuser, 20 vaned diffusers were experimentally tested with three different impellers having the same meridional contour. All diffusers were designed for industrial compressor stages with subsonic diffuser flow and had parallel sidewalls, diffuser vanes with simple circular are profiles of constant thickness and rounded leading edges. In the first part of this investigation the l
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Arndt, N., A. J. Acosta, C. E. Brennen, and T. K. Caughey. "Experimental Investigation of Rotor-Stator Interaction in a Centrifugal Pump With Several Vaned Diffusers." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-62.

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This paper describes an experimental investigation of rotor–stator interaction in a centrifugal pump with several vaned diffusers. Steady and unsteady diffuser vane pressure measurements were made for a two–dimensional test impeller. Unsteady impeller blade pressure measurements were made for a second two–dimensional impeller with blade number and blade geometry identical to the two–dimensional impeller used for the diffuser vane pressure measurements. The experiments were conducted for different flow coefficients and different radial gaps between the impeller blade trailing edge and the diffu
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Takahashi, Mikio, Dai Iwasaki, Shinichi Konno, Shinichiro Ejiri, and Masahiro Miyabe. "Passive Suppression of Diffuser Rotating Stall in a Centrifugal Pump by the Non-Symmetry Diffuser Vane." In ASME 2024 Fluids Engineering Division Summer Meeting collocated with the ASME 2024 Heat Transfer Summer Conference and the ASME 2024 18th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/fedsm2024-131293.

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Abstract Diffuser Rotating Stall (DRS), a fluid instability, often restricts the operational range of diffuser-type centrifugal pumps, requiring countermeasures in industry. Despite various proposed methods for DRS suppression, the optimal approach minimizing pump efficiency reduction remains nonexistent. In this study, we explored a new DRS suppression method by investigating the mechanism when combining long and short vanes in the vaned diffuser of an industrial pump. The original vaned diffuser has eight long vanes, with short vanes created by removing the leading edge alternately. Varying
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Tamaki, Hideaki, and Satoshi Yamaguchi. "A Method for Preliminary Design of Variable Geometry Vaned Diffuser for Centrifugal Compressor." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-103317.

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Abstract Centrifugal compressors require a wide operating range as well as high efficiency. Typical active control forms to enhance the operating range are suction throttling with a valve in a suction line, discharge throttling with a ring installed in a vaneless diffuser, variable inlet guide vanes, and variable geometry vaned diffuser. This study focuses on the design of a variable geometry vaned diffuser (VVD) whose vane rotates around a pivot to adjust its opening and proposes a method to estimate the main parameters of a VVD at the preliminary design stage. The design method here is based
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Stein, W., and M. Rautenberg. "Flow Measurements in Two Cambered Vane Diffusers With Different Passage Widths." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-46.

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To investigate the influence of the vaneless space between impeller exit and the diffuser vanes, datailed flow measurements in two diffusers with the same vane geometry but different passage width are compared. The three-dimensional character of the flow changes between impeller exit and the entry to the two dimensional vanes depending on the shape of the shroud. After initial measurements with a constant area vaneless space, the width of the vaned diffuser was later on reduced by 10%. The compressor maps show an increase in overall pressure rise and efficiency with the width reduction. To get
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Justen, Friedrich, Kai U. Ziegler, and Heinz E. Gallus. "Experimental Investigation of Unsteady Flow Phenomena in a Centrifugal Compressor Vaned Diffuser of Variable Geometry." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-368.

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The behaviour of vaned radial diffusers is generally considered to be due to the flow phenomena in the vaneless and the semi-vaned space in the diffuser inlet region. Even considering unsteady aspects, the adjacent diffuser channel is regarded as less important. The flat wedge vaned diffuser of the investigated centrifugal compressor stage allows an independent continuous adjustment of the diffuser vane angle and the radial gap between impeller outlet and diffuser vane inlet, so that information about the importance of these geometric parameters can be obtained. The time dependent pressure dis
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Ramakrishnan, Kishore, Simon K. Richards, Franc¸ois Moyroud, and Vittorio Michelassi. "Multi-Blade Row Interactions in a Low Pressure Ratio Centrifugal Compressor Stage With a Vaned Diffuser." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45932.

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Previous experimental and CFD investigation of a GE Oil and Gas centrifugal compressor stage with a vaneless diffuser revealed a complex excitation mechanism caused by an aero-acoustic interaction between three blade rows. In stages with vaned diffusers, additional sources of aeromechanical excitation on the impeller can be expected. This unsteady CFD investigation is a follow-up from the previous vaneless diffuser study to identify any additional sources of excitation that arise in the presence of a vaned diffuser in preparation for aeromechanic tests to be conducted later. The study confirms
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Kmecl, Tomaz, Rudi ter Harkel, and Peter Dalbert. "Optimization of a Vaned Diffuser Geometry for Radial Compressors: Part II — Optimization of a Diffuser Vane Profile in Low Solidity Diffusers." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-434.

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In addition to the diffuser parameter study described in part 1 of this paper the influence of diffuser vane profiles on the efficiency and the operating range of a low solidity diffuser has been studied. Ten different diffuser profiles with identical diffuser configuration (12 vanes, σ = 0.7) were numerically compared. Four of them were tested experimentally. The basic diffuser for this investigation was a simple circular are profile of constant thickness with rounded leading and trailing edges. The simplest improvement of the basic diffuser was made with an elliptical leading edge. The ellip
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Pinarbasi, Ali, and Mark W. Johnson. "Detailed Off Design Flow Measurements in a Centrifugal Compressor Vaned Diffuser." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-343.

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Abstract:
Three component hot wire measurements in the vaneless space and vane region of a low speed centrifugal compressor vaned diffuser are presented. These comprise mean velocity and turbulence level distributions for a below and above design flow rate for three vane-to-vane locations at each of five radial measurement stations. The flow entering the diffuser closely resembles the classic jet-wake flow characteristic of centrifugal impeller discharges. A strong upstream influence of the diffuser vanes is observed which results in significant variations in flow quantities between the vane-to-vane loc
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