Evaluation of Suction Performance of Inducer with Splitter Blade

Tanaka, Yohei; Kitabata, Takahiro; Watanabe, Satoshi; Ohashi, Satoshi; Sakata, Akira; Matsunaga, Yasushi

doi:10.5293/ijfms.2021.14.1.013

Cited by 1 publication

(3 citation statements)

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“…in our previous study [24]. We have used four different-size meshes, Fine (4,142,854 nodes), Medium (2,543,652 nodes), Coarse (1,030,904 nodes) and Very coarse (562,976) meshes.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 1 and Table 1 respectively show the schematic view and specifications of inducer used in this numerical investigation. This inducer was used in our previous investigation on the inducer design and was called "Non-splitter inducer" [24]. The occurrence of cavitation surge has been confirmed at low flow rates.…”

Section: Inducer Model and Inlet Geometries With Suppression Devicesmentioning

confidence: 98%

“…To confirm the effect of this new device on the inlet backflow and the flow recirculation, computational fluid dynamics (CFD) simulation is firstly conducted. A 6 FE-21-1321 Watanabe model inducer with simpler geometry which was used in our previous investigation on the inducer design [24] is utilized for the numerical investigation. In addition to flow features including the magnitude of flow recirculation, suction performance of the model inducer is investigated by employing a homogeneous cavitation model proposed by Zwart et al [25].…”

Section: Introductionmentioning

confidence: 99%

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Suppression of Cavitation Surge in Turbopump With Inducer by Reduced-Diameter Suction Pipe With Swirl Brake

Tanaka

Kitabata

Nasu

et al. 2022

Journal of Fluids Engineering

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Downsizing and high power density of turbopumps are achieved by increasing their rotational speed. Cavitation often becomes a problem while the influence of cavitation will be generally relieved by employing an inducer before the impeller. For general-use turbopumps with inducer, instability-free operation as well as high suction performance are required in wide flow rate range including extremely low flow rate. However, the low frequency and large amplitude of cavitation surge is often be a serious problem even with inducer when operated at very low flow rates. In this study, a reduced-diameter suction pipe (RSP) equipped with swirl brake (SB) was proposed for a suppression device of the inlet backflow as well as of the cavitation surge through removing swirling velocity component. The effectiveness of this device was investigated by CFD and experiments. First, several geometries of RSP with SB were examined by CFD, and it was found that the extension of inlet backflow was stopped at this device provided that the swirl brake had a sufficient radial or axial length. Then, one of the proposed RSP with SB was manufactured, and the experimental evaluation of the effectiveness of this device was conducted. It seemed that RSP with SB could well prevent the extension of inlet backflow. The cavitation surge was completely suppressed even at extremely low flow rates. As a result, the suction performance was also improved at low flow rates.

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“…in our previous study [24]. We have used four different-size meshes, Fine (4,142,854 nodes), Medium (2,543,652 nodes), Coarse (1,030,904 nodes) and Very coarse (562,976) meshes.…”

Section: Methodsmentioning

confidence: 99%

Section: Inducer Model and Inlet Geometries With Suppression Devicesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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