Reduction of radial thrust by using triple-volute casing

Mina, Ehab M.; AbdelMessih, Raouf N.; Matbouly, M.E.

doi:10.1016/j.asej.2019.03.003

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…Pengaruh kecepatan putaran terhadap kinerja hidrolik untuk saluran aliran pada sistem pemompaan tubular ekstensi poros [11] menunjukan beberapa dampak yaitu pada peningkatan kecepatan putaran dengan koefisien aliran [22] yang sama terjadi peningkatan sirkulasi rata-rata, sudut pusaran dan rasio tekanan pada bagian outlet dan inlet saluran [11].…”

Section: Pendahuluanunclassified

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Studi Pengaruh Kecepatan Putar Impeller Terhadap Performance Model Waterjet Propulsor

Tahalele,

Kesaulia,

Firmansyah

2024

metiks

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Abstrak. Kecepatan putaran impeller sangat mempengaruhi kinerja pompa waterjet. Berbagai penelitian telah meneliti dampak terhadap efisiensi energi untuk menyelaraskan desain dengan hasil nyata. Penelitian ini menguji kecepatan putaran 2500 – 3500 rpm pada pompa aksial berdiameter 120mm dengan lima sudu impeller dan stator. Pengujian dilakukan secara eksperimental untuk mengukur kecepatan aliran rata-rata dan menggunakan pendekatan aliran turbulen pangla 1/7 muntuk menggambarkan profil kecepatan pada penampang meridian. Hasil penelitian menunjukkan bahwa profil kecepatan dan pola aliran masuk di depan impeller dan nozzle berubah seiring dengan perubahan kecepatan impeller. Kecepatan aliran meningkat di tengah pada spanwise penampang aliran. Profil aliran dipengaruhi oleh bentuk penampang, dinding saluran dan poros. Nilai koefisien torsi (Kq) dan koefisien dorong (Kt) mengalami penurunan sebesar -35,8% – 8,7% sebanding dengan peningkatan putaran. Perubahan kecepatan impeler mengubah profil kecepatan, dengan penurunan torsi dan koefisien dorong secara proporsional. Menentukan putaran optimal pada 750 - 2750 rpm masih belum dapat ditentukan karena torsi dan daya dorong terus meningkat. Pada kecepatan yang lebih tinggi, koefisien menunjukkan perubahan minimal, yang menunjukkan efek ambang batas. Nilai torsi dan thrust meningkat proporsional hampir membentuk hubungan linear dengan putaran, sedangkan koefesien torsi dan koefesien thrust menurun proporsional hampir membentuk fungsi polynomial orde 5.

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Section: Pendahuluanunclassified

“…Pada tahap desain, peningkatan efesiensi pompa dilakukan dengan berbagai metode salah satunya adalah adalah dengan memasang sudusudu pengarah (guide vanes) di belakang impeller pompa [17]. Studi-studi peningkatan efesiensi pompa dilakukan dengan metodemetode teoretis [31], eksperimental [22], [24], [30], [33] maupun numerical dengan CFD [5], [34], [35].…”

Section: Pendahuluanunclassified

Studi Pengaruh Kecepatan Putar Impeller Terhadap Performance Model Waterjet Propulsor

Tahalele,

Kesaulia,

Firmansyah

2024

metiks

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“…Kang et al [16] studied the effects of a twin volute in a submersible centrifugal pump and obtained a uniform distribution of high absolute velocity in the volute, homogeneously distributed flow structures and a flat high-velocity profile at the volute throat. Mina et al [17] used a triple-volute casing design to reduce the radial thrusts in a single-stage centrifugal pump. Although a more uniform pressure distribution is offered by three volutes, the design is not feasible in multistage centrifugal pumps.…”

Section: Introductionmentioning

confidence: 99%

Flow Field Analysis and Feasibility Study of a Multistage Centrifugal Pump Designed for Low-Viscous Fluids

Shamsuddeen

Kim

et al. 2021

Applied Sciences

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A multistage centrifugal pump is designed for pumping low-viscosity, highly volatile and flammable chemicals, including hydrocarbons, for high head requirements. The five-stage centrifugal pump consists of a double-suction impeller at the first stage followed by a twin volute. The impellers for stages two through five are single-suction impellers followed by diffuser vanes and return channel vanes. The analytical performance is calculated initially in the design stage by applying similarity laws to an existing scaled-down pump model designed for low flow rate applications. The proposed pump design is investigated using computational fluid dynamics tools to study its performance in design and off-design conditions for water as the base fluid. The design feasibility of the centrifugal pump is tested for other fluids, such as water at a high temperature and pressure, diesel and debutanized diesel. The pump design is found to be suitable for a variety of fluids and operating ranges. The losses in the pump are analyzed in each stage at the best efficiency point. The losses in efficiency and head are observed to be higher in the second stage than in other stages. The detailed flow behavior at the second stage is studied to identify the root cause of the losses. Design modifications are recommended to diminish the losses and improve the overall performance of the pump.

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“…The cross-flow openings at the exit reforms the flow by reducing the recirculation zones in the passage. Mina et al 5 carried out experimental analysis on the centrifugal pump with volute comprising of the passage vanes. Two extra vanes were added along the volute passage to replicate the model as three volute casings.…”

Section: Introductionmentioning

confidence: 99%

“…Mina et al. 5 carried out experimental analysis on the centrifugal pump with volute comprising of the passage vanes. Two extra vanes were added along the volute passage to replicate the model as three volute casings.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigations on the effect of volute casing treatment for performance augmentation in a centrifugal fan

Nilugal

Karanth

Madhwesh

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article presents the effect of volute chamfering on the performance of a forward swept centrifugal fan. The numerical analysis is performed to obtain the performance parameters such as static pressure rise coefficient and total pressure coefficient for various flow coefficients. The chamfer ratio for the volute is optimized parametrically by providing a chamfer on either side of the volute. The influence of the chamfer ratio on the three dimensional flow domain was investigated numerically. The simulation is carried out using Re-Normalisation Group (RNG) k-[Formula: see text] turbulence model. The transient simulation of the fan system is done using standard sliding mesh method available in Fluent. It is found from the analysis that, configuration with chamfer ratio of 4.4 is found be the optimum configuration in terms of better performance characteristics. On an average, this optimum configuration provides improvement of about 6.3% in static pressure rise coefficient when compared to the base model. This optimized chamfer configuration also gives a higher total pressure coefficient of about 3% validating the augmentation in static pressure rise coefficient with respect to the base model. Hence, this numerical study establishes the effectiveness of optimally providing volute chamfer on the overall performance improvement of forward bladed centrifugal fan.

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Reduction of radial thrust by using triple-volute casing

Cited by 7 publications

References 7 publications

Studi Pengaruh Kecepatan Putar Impeller Terhadap Performance Model Waterjet Propulsor

Studi Pengaruh Kecepatan Putar Impeller Terhadap Performance Model Waterjet Propulsor

Flow Field Analysis and Feasibility Study of a Multistage Centrifugal Pump Designed for Low-Viscous Fluids

Numerical investigations on the effect of volute casing treatment for performance augmentation in a centrifugal fan

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