Relevant bibliographies by topics / Impeller configurations

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

Academic literature on the topic 'Impeller configurations'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Impeller configurations"

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Ebrahimi, Tamer, Villegas, Chiappetta, and Ein-Mozaffari. "Application of CFD to Analyze the Hydrodynamic Behaviour of a Bioreactor with a Double Impeller." Processes 7, no. 10 (2019): 694. http://dx.doi.org/10.3390/pr7100694.

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Stirred bioreactors are commonly used unit operations in the pharmaceutical industry. In this study, computational fluid dynamics (CFD) was used in order to analyze the influence of the impeller configuration (Segment–Segment and Segment–Rushton impeller configurations) and the impeller rotational speed (an operational parameter) on the hydrodynamic behaviour and mixing performance of a bioreactor equipped with a double impeller. A relatively close agreement between the power values obtained from the CFD model and those measured experimentally was observed. Various parameters such as velocity
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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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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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Baun, Daniel O., and Ronald D. Flack. "Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance." International Journal of Rotating Machinery 9, no. 2 (2003): 145–52. http://dx.doi.org/10.1155/s1023621x03000137.

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A comparison is made between the characteristics of the measured lateral impeller forces and the hydraulic performances of a four- and a five-vane impeller, each operating in a spiral volute, a concentric volute, and a double volute. The pump's rotor was supported in magnetic bearings. In addition to supporting and controlling the rotor motion, the magnetic bearings also served as active load cells and were used to measure the impeller forces acting on the pump's rotor. The lateral impeller force characteristics, as a function of a normalized flow coefficient, were virtually identical in the f
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Manshoor, Bukhari, Afifah Yusof, Suraya Laily, Izzuddin Zaman, and Amir Khalid. "An Effect of Fractal Baffles and Impellers with Double Stage 4-Blade Rushton Turbine to Fluid Flow Behaviour in Stirred Tank." Applied Mechanics and Materials 660 (October 2014): 816–22. http://dx.doi.org/10.4028/www.scientific.net/amm.660.816.

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The stirred tank is widely used in many industries to obtain the desired type of fluid mixing. In the context of mixing process, two different fluids and have a different properties will mix in a single equipment to produce another fluid with a new property. In this research, a new approach of stirred tank which is containing a new design of baffles and impellers was proposed for fluid mixing. The new design of baffles and impellers that proposed here are used a fractal pattern for both parts in the stirred tank. Implementing a fractal pattern for baffles and impellers in stirred tank believe
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Fořt, Ivan, Jiří Hájek, and Václav Machoň. "Energetic efficiency of two impellers on the same shaft in a cylindrical baffled vessel of high height/diameter ratio." Collection of Czechoslovak Chemical Communications 54, no. 9 (1989): 2345–56. http://dx.doi.org/10.1135/cccc19892345.

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The paper deals with the experimental study of the indicating particle circulation and the impeller power input in a liquid mechanically agitated with two high-speed impellers (combination of the standard turbine impeller and the six inclined (at 45°) plane blades impeller) on the same shaft in a slender vessel (its height is equal double of the vessel diameter) equipped with four radial baffles at its walls under the turbulent regime of agitated charge flow. By the visual method of the indicating particle it is examined its circulation in the lower part of the system pumping effect of the low
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Jirout, Tomáš. "Pumping Capacity of Pitched Blade Multi-Stage Impellers." Chemical and Process Engineering 35, no. 1 (2014): 47–53. http://dx.doi.org/10.2478/cpe-2014-0004.

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Abstract This paper extends knowledge about flow in an agitated batch with pitched blade multi-stage impellers. Effects of various geometrical parameters (blade number, distance between impellers) of pitched blade multi-stage impellers on pumping ability have been investigated. Axial velocity profiles were measured by LDA (Laser Doppler Anemometry). Axial pumping capacities were obtained by integration of measured axial velocity profiles in outflow from impellers. Main attention was focused on the effect of the distance between impellers in multi-stage configurations, on their pumping capacity
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Feng, Jianjun, Friedrich-Karl Benra, and Hans Josef Dohmen. "Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps." International Journal of Rotating Machinery 2007 (2007): 1–10. http://dx.doi.org/10.1155/2007/34752.

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Numerical simulations on impeller-diffuser interactions in radial diffuser pumps are conducted to investigate the unsteady flow, and more attention is paid to pressure fluctuations on the blade and vane surfaces. Calculations are performed at different operating points, different blade number configurations, and different radial gaps between the impeller and diffuser to examine their effects on the unsteady flow. Computational results show that a jet-wake flow structure is observed at the impeller outlet. The biggest pressure fluctuation on the blade is found to occur at the impeller trailing
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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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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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Chomiuk, Bartłomiej, and Janusz Skrzypacz. "Comparison of energy parameters of a centrifugal pump with a multi-piped impeller in cooperation either with an annular channel and a spiral channel." Open Engineering 8, no. 1 (2018): 513–22. http://dx.doi.org/10.1515/eng-2018-0063.

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Abstract The article presents results of numerical analyzes, which raise a subject of influence of the cooperation the multi-piped impeller with a rationalized flow geometry of annular casing and volute casing for liquid flow through centrifugal pump and their operating parameters in the extremely low specific speed nq<10. The multi-piped impeller (patented by authors) is a major alternative to classic vane impellers. The stator type is responsible for the conversion of the kinetic energy of the liquid by the impeller outlet into potential energy, which determines the overall efficiency of
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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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Dissertations / Theses on the topic "Impeller configurations"

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Souidi, Kaïes. "Effet de la configuration des agitateurs dans une colonne à faible entrefer mécaniquement agitée sur la dispersion du gaz en foisonnement : approches expérimentale et numérique." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00836761.

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Cette thèse est dédiée à l'étude de l'effet de la configuration des agitateurs (pales planes) et la nature du tensioactif sur la dispersion de gaz dans un liquide en vue d'obtenir un produit foisonné. Cette étude est menée à deux échelles pilote et locale. Le premier chapitre est dédié à une étude à l'échelle pilote. Les résultats ont montré qu'à conditions opératoires fixées, lorsque les agitateurs sont collés et décalés, l'aspect distributif de la dispersion de gaz est amélioré. L'aspect dispersif (taille des bulles), en revanche, reste peu sensible à la configuration des agitateurs. Les pro
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Shih-ChiehChen and 陳世杰. "Optimum Configuration in the Impeller of Centrifugal Compressor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/28j46w.

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Lin, Sheng-Kuo, and 林聖國. "Configuration Design of A Supercritical CO2 Recompression Brayton Cycle including Impeller Design and CFD Analysis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/pu25fb.

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Huang, Bo-Xian, and 黃泊憲. "Research on the optimal collision-free measuring path configuration for an impeller using a 5-axis CMM." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38527202833551232748.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>96<br>The objective this study is to develop a DMIS post-processor, to configure an optimal collision-free measuring path of an impeller for a 5-axis coordinate measuring machine (CMM). The developed DMIS Post-processor mainly includes the following modules, namely the calculation of collision-free angle range, calculation of the minimal number of variations for the change of probe orientation, and the calculation of the shortest measuring path, etc. Based on the calculated collision-free angle range of a probe stylus at each measuring point, the minimal number of va
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Book chapters on the topic "Impeller configurations"

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"marine-type impeller is added to provide some axial-flow pumping along with the ra-dial-flow high-shear mixing. This impeller may be located at a level that can cause splashing if only a portion of the batch is mixed, e.g., during the addition of one emul-sion phase to another. A wide variety of mixing-head configurations are available. Some have vertical teeth, a stator with round holes, a stator with vertical slots, or a finer screen stator, which type is often specified for emulsions, as shown in Fig. 18. ! . if." In Pharmaceutical Dosage Forms. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-44.

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"impeller and the stationary housing. Many ingenious designs are available that use various configurations with the purpose of increasing the probability that the solid par-ticles or liquid droplets travel through the rotor/stator zones where maximum shearing occurs. Almost all designs have some form of teeth or blades, which are meshed into an accompanying stationary housing as illustrated in Fig. 28. Of particular importance is the fact that, when a mixture containing solid particles or agglomerations or emulsion droplets is pumped through a fixed gap rotor/stator mixer, not all of the droplets or particles pass through the highest shearing zones. Some par-ticles passing through the machine may escape the rotor/stator gaps and be exposed only to some of the lower shear zones. The more open the design of the rotor/stator, the Fig. 28 Internal parts of rotor/stator mixer showing meshed teeth. (From Ref. 31.)." In Pharmaceutical Dosage Forms. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-50.

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"*! few inches up to around 3 ft depending on the manufacturer. The impellers are of cast construction, which reduces the cost but also obviates customizing of the impeller with-out incurring added cost. Propeller mixers can be installed on a vertical centerline, on an angle off the vertical, or through the sidewall of the process vessel. Centerline installation requires the use of baffles in the vessel. Side-entering designs offer the advantage of very ef-fective pumping for low horsepower and low initial cost in large vessels over 1000 gal. However, side-entering designs must have a seal that has to contend with side loads of the candlevered shaft. This has been a problem in some critical sanitary applications. However, if the batches are very large, a side-entering prop mixer may be a logical alternative to top-centerline-installed axial- and radial-flow turbines. The most often used installation configuration is the top-entering angled method. This method produces a good circulation pattern in the process mixing tank without the." In Pharmaceutical Dosage Forms. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-38.

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Conference papers on the topic "Impeller configurations"

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Cellai, A., G. Ferrara, L. Ferrari, C. P. Mengoni, and L. Baldassarre. "Experimental Investigation and Characterization of the Rotating Stall in a High Pressure Centrifugal Compressor: Part IV — Impeller Influence on Diffuser Stability." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38394.

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Vaneless diffuser rotating stall is a major problem for centrifugal compressors since it is a limit to their working range. In particular the last stage seems to be the most critical. In the literature some good correlations for predicting stall inception can be found but they do not adequately cover the case of the last stage configuration, especially for very low blade-outlet-width-to-impeller-radius-ratio impellers typically used in high-pressure applications. Extensive research has been performed to define diffuser stall limits for this family of stages: three impellers characterized by di
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Roberts, Douglas A., and Suresh C. Kacker. "Numerical Investigation of Tandem-Impeller Designs for a Gas Turbine Compressor." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0324.

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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 non-existent.
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Carnevale, E. A., G. Ferrara, L. Ferrari, and L. Baldassarre. "Experimental Characterization of Vaneless Diffuser Rotating Stall: Part VI — Reduction of Three Impeller Results." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90694.

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Vaneless diffuser rotating stall is a major problem for centrifugal compressors since it is a limit to their working range. In the literature some good correlations for predicting stall inception can be found but they do not adequately cover the case of the last stage configuration, especially for very low blade-outlet-width-to-impeller-radius-ratio impellers typically used in high-pressure applications. Extensive research has been performed to define diffuser stall limits for this family of stages: three impellers characterized by different blade-outlet-width-to-impeller-radius-ratios have be
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Ascanio, Gabriel, Magdalena Brito-Baza´n, Edmundo Brito-De La Fuente, Pierre J. Carreau, and Philippe A. Tanguy. "Mixing Enhancement of Non-Newtonian Fluids Using Unconventional Configurations." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31359.

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Dynamic perturbations and off-centered single impeller configurations have been investigated to reduce mixing time with shear thinning fluids. The use of a color-decolorization technique based on a fast acid-base reaction allowed to measure mixing times and to reveal the presence of both segregated and dead zones. A statistical design approach has been used to evaluate the effect of the impeller position as well as the dynamic conditions and their interactions. Mixing times and flow patterns for shear thinning fluids were presented and compared to conventional operating modes. Homogenization w
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Sellgren, Anders, Abdallah Mustafa, Graeme Addie, and L. Whitlock. "Performance of different centrifugal slurry pump impeller configurations when pumping thickened tailings." In 14th International Seminar on Paste and Thickened Tailings. Australian Centre for Geomechanics, Perth, 2011. http://dx.doi.org/10.36487/acg_rep/1104_35_sellgren.

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Ma, Yan, Guang Xi, and Guangkuan Wu. "An Impact of Self-Recirculation Casing Treatment (SRCT) Configurations on Impeller Stall Margin and the Flow Field." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68335.

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The present paper describes an investigation of stall margin enhancement and a detailed analysis of the impeller flow field due to self-recirculation casing treatment (SRCT) configuration of a high-speed small-size centrifugal impeller. The influence of different SRCT configurations on the impeller flow field at near-stall condition has been analyzed, highlighting the improvement in stall flow ability. This paper also discusses the influence of the SRCT configurations on the inlet flow angle, inlet swirl velocity and loss distribution in the impeller passage to understand the mechanism of the
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Qian, Zeng. "Numerical Studies of Diffuser Inlet Configurations for Small Flow Rate Radial Compressors." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50612.

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A computational fluid dynamics (CFD) study is presented to predict the impact of a number of inlet configuration features to the performance of centrifugal compressors diffusers. These features include impeller-diffuser alignment, diffuser inlet edge radius, impeller tip gap width, flow angle, and tip leakage/injection. In small flow rate centrifugal compressors the distance between hub and shroud at impeller discharge could be so small that due to thermal expansion and component mechanical tolerance stacking accurate alignment between the impeller and the diffuser is difficult to achieve. The
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Ramesh Rajakumar, D., S. Ramamurthy, and M. Govardhan. "Experimental Investigations on Mixed Flow Impeller and Vane Diffuser Under Various Operating Conditions." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85695.

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Experimental Investigations are carried out to study the effect of tip clearance flow in a mixed flow compressor stage. Two configurations, namely; constant and variable clearance gaps between impeller and stationary shroud are considered. For the purpose of the present investigations, a mixed flow compressor stage is designed and fabricated. The flow investigations were carried out in a closed circuit compressor rig. Detailed steady and unsteady measurements were carried out for three clearance gaps, namely; 0.5 mm, 0.75 mm, 0.9 mm. From the experimental investigations it is shown that consta
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Kim, Jae-Won, Hyo-Geun Ji, and Youn-Jea Kim. "Design of Inducer-Impeller Configurations of Self-Priming Vacuum Pump Using Response Surface Method." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-02249.

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Self-priming vacuum pump is characterized for absorbing viscous fluid such as slurry and it is operated by the rotation of inducer and impeller generating partial vacuum in the rotor casing. In this study, the effect of inducer-impeller configurations on the performance of self-priming vacuum pump was precedently investigated with design parameters by using commercial code, ANSYS CFX to formulate the ranges of input parameters for optimization. And then, the optimization of inducer-impeller configurations was conducted by using response surface method (RSM) based on design of experiment (DOE)
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Jin, Jeong-Min, Hyo-Geun Ji, and Youn-Jea Kim. "Effect of Splitter Configurations on the Performance of a Sludge Pump." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5298.

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Abstract Sludge pump, a type of centrifugal pump, is widely used to transport high-density sludge. The pump uses the impeller to generate a pressure difference for transporting the working fluid. The impeller is a crucial component of the pump. The internal pressure becomes higher with an increasing number of impeller blades, and this in turn results in an increased head. However, the increase in the number of blades interferes with the pump inlet flow, resulting in an efficiency loss due to an increase of surface friction. Therefore, in this study, numerical analysis was performed using ANSYS
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