Effect of diffuser angle and J-groove depth on improvement in suction performance of annular jet pump model
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Jet pumps are extensively used in the transportation of sensitive goods such as food (potato, onion, and capsicum), capsules, and live fish. The operating mechanism of the jet pump is the transfer of momentum and energy from the primary to secondary fluid without any rotating and reciprocating bodies. The jet pump is prone to cavitation in the mixing chamber of the nozzle outlet, where an extreme pressure drop occurs. This study presents numerical investigation results regarding the improvement in suction performance in an annular jet pump (AJP) model by varying the diffuser angle and J-groove depth. The J-groove is a rectangular groove engraved on the wall of the AJP model in the flow direction. The study results indicate that the installation of the J-groove with a suitable diffuser angle in the AJP model is effective in improving the suction performance and consequently suppressed cavitation in the pump. A tradeoff exists between the suction performance improvement and pump efficiency reduction by the J-groove installation; however, the degradation in the pump efficiency is insignificant compared with the suction performance improvement.
Abstract
Jet pumps are extensively used in the transportation of sensitive goods such as food (potato, onion, and capsicum), capsules, and live fish. The operating mechanism of the jet pump is the transfer of momentum and energy from the primary to secondary fluid without any rotating and reciprocating bodies. The jet pump is prone to cavitation in the mixing chamber of the nozzle outlet, where an extreme pressure drop occurs. This study presents numerical investigation results regarding the improvement in suction performance in an annular jet pump (AJP) model by varying the diffuser angle and J-groove depth. The J-groove is a rectangular groove engraved on the wall of the AJP model in the flow direction. The study results indicate that the installation of the J-groove with a suitable diffuser angle in the AJP model is effective in improving the suction performance and consequently suppressed cavitation in the pump. A tradeoff exists between the suction performance improvement and pump efficiency reduction by the J-groove installation; however, the degradation in the pump efficiency is insignificant compared with the suction performance improvement.
참고문헌 (29)
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