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    Enhancement of the Thermodynamic Suppression Effect of Cavitation in a Hydrofoil With a Slit

    Source: Journal of Fluids Engineering:;2025:;volume( 147 ):;issue: 009::page 91202-1
    Author:
    Iga, Yuka
    ,
    Katagiri, Takeru
    ,
    Okajima, Junnosuke
    DOI: 10.1115/1.4068248
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The occurrence and growth of cavitation are suppressed in cryogenic fluids used as propellants for liquid rockets, and this phenomenon is called the thermodynamic suppression effect of cavitation. This effect is attributed to the temperature drop around the cavity caused by the latent heat of evaporation. Further, a method to suppress oscillation phenomena called cavitation instabilities by cutting off a part of the inducer blade (referred to as a slit inducer) has been proposed by the authors. Although the suitability effect was confirmed for suppressing the cavitation oscillation, there is a need to demonstrate that the slit does not inhibit the thermodynamic suppression effect of cavitation even when it is installed in the inducer of the liquid rocket turbopump. In this study, the thermodynamic suppression effect of cavitation is examined in an experiment with a NACA0009 hydrofoil with and without a slit in a hot-water cavitation tunnel as a preliminary step in the investigation of a slit inducer. The temperature drops and the distribution inside the cavity were measured by our direct temperature measurement method with unsteady temperature estimation method under T∞ = 90 °C to investigate the small difference in the thermodynamic suppression effect that does not appear in the cavity length. The expanded uncertainty of the temperature probe using thermistor is 17 mK. As a result, it was found that the cavity suppression amount in the region downstream of the slit inside the cavity increased under the condition of unsteady cavitation in the hydrofoil with a slit.
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      Enhancement of the Thermodynamic Suppression Effect of Cavitation in a Hydrofoil With a Slit

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    contributor authorIga, Yuka
    contributor authorKatagiri, Takeru
    contributor authorOkajima, Junnosuke
    date accessioned2025-08-20T09:46:47Z
    date available2025-08-20T09:46:47Z
    date copyright4/11/2025 12:00:00 AM
    date issued2025
    identifier issn0098-2202
    identifier otherfe_147_09_091202.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4308836
    description abstractThe occurrence and growth of cavitation are suppressed in cryogenic fluids used as propellants for liquid rockets, and this phenomenon is called the thermodynamic suppression effect of cavitation. This effect is attributed to the temperature drop around the cavity caused by the latent heat of evaporation. Further, a method to suppress oscillation phenomena called cavitation instabilities by cutting off a part of the inducer blade (referred to as a slit inducer) has been proposed by the authors. Although the suitability effect was confirmed for suppressing the cavitation oscillation, there is a need to demonstrate that the slit does not inhibit the thermodynamic suppression effect of cavitation even when it is installed in the inducer of the liquid rocket turbopump. In this study, the thermodynamic suppression effect of cavitation is examined in an experiment with a NACA0009 hydrofoil with and without a slit in a hot-water cavitation tunnel as a preliminary step in the investigation of a slit inducer. The temperature drops and the distribution inside the cavity were measured by our direct temperature measurement method with unsteady temperature estimation method under T∞ = 90 °C to investigate the small difference in the thermodynamic suppression effect that does not appear in the cavity length. The expanded uncertainty of the temperature probe using thermistor is 17 mK. As a result, it was found that the cavity suppression amount in the region downstream of the slit inside the cavity increased under the condition of unsteady cavitation in the hydrofoil with a slit.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleEnhancement of the Thermodynamic Suppression Effect of Cavitation in a Hydrofoil With a Slit
    typeJournal Paper
    journal volume147
    journal issue9
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.4068248
    journal fristpage91202-1
    journal lastpage91202-9
    page9
    treeJournal of Fluids Engineering:;2025:;volume( 147 ):;issue: 009
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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