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Cavitation luminescence in a hydraulic cone throttle valve: simulation and experiments

Kavitationslumineszenz in einer hydraulischen Kegeldrosselklappe: Simulation und Experimente

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Abstract

With a focus on cavitation luminescence, simulations and experiments were performed concerning cavitation within a cone throttle valve. The finite element method was used to simulate the flow field of the cone throttle valve. In the simulation, boundary conditions for the fluid–structure coupling were imposed, and a cavitation model was used to obtain the pressure and cavitation distribution within the cone throttle valve. For the experiment, a hydraulic cavitation system was constructed, and a highly transparent polymethyl methacrylate (PMMA) model valve was used to observe the flow field in the cone throttle valve. Four different settings of the system pressure (1, 2, 3, and 4 MPa) and five different valve-opening settings (2, 4, 6, 8, and 10 mm) were set up. Finally, cavitation luminescence was observed using the experimental method. The simulation and experimental results indicate that cavitation in the cone throttle valve is affected by both system pressure and value opening. With the same valve-opening setting, cavitation is more obvious with increasing system pressure. Similarly, under the same system pressure, cavitation is more obvious with a more open valve. During cavitation, blue light is emitted in the cone throttle valve. The degree of luminescence increases with increasing system pressure and valve opening. Compared with the system pressure, valve opening affects the cavitation luminescence more.

Zusammenfassung

Mit dem Schwerpunkt Kavitationslumineszenz wurden Simulationen und Experimente zur Kavitation innerhalb einer Kegeldrosselklappe durchgeführt. Zur Simulation des Strömungsfeldes der Kegeldrosselklappe wurde die Finite-Elemente-Methode verwendet. Bei der Simulation wurden Randbedingungen für die Fluid-Struktur-Kopplung vorgegeben und ein Kavitationsmodell verwendet, um die Druck- und Kavitationsverteilung innerhalb der Kegeldrosselklappe zu erhalten. Für das Experiment wurde ein hydraulisches Kavitationssystem konstruiert, und ein hochtransparentes Polymethylmethacrylat(PMMA)-Modellventil wurde zur Beobachtung des Strömungsfeldes in der Kegeldrosselklappe verwendet. Es wurden vier verschiedene Einstellungen des Systemdrucks (1, 2, 3 und 4 MPa) und fünf verschiedene Ventilöffnungseinstellungen (2, 4, 6, 8 und 10 mm) eingerichtet. Schließlich wurde mit der experimentellen Methode die Kavitationslumineszenz beobachtet. Die Simulation und die experimentellen Ergebnisse zeigen, dass die Kavitation in der Kegeldrosselklappe sowohl vom Systemdruck als auch von der Werteöffnung beeinflusst wird. Bei gleicher Ventilöffnungseinstellung war die Kavitation mit zunehmendem Systemdruck deutlicher zu erkennen. In ähnlicher Weise ist die Kavitation bei gleichem Systemdruck mit einem offeneren Ventil offensichtlicher. Während der Kavitation wird im Kegeldrosselventil blaues Licht ausgesendet. Der Grad der Lumineszenz nimmt mit zunehmendem Systemdruck und der Öffnung des Ventils zu. Im Vergleich zum Systemdruck beeinflusst die Ventilöffnung die Kavitationslumineszenz stärker.

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Acknowledgements

We thank Richard Haase, Ph.D., from Liwen Bianji, Edanz Group China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

Funding

This project was supported by the National Key Research and Development Program of China (grant no. 2018YFB2001201), the National Natural Science Foundation of China (grant no. 51805108), the Youth Innovative Talents Training Program of Regular Colleges and Universities in Heilongjiang Province, China, in 2017 (grant no. UNPYSCT-2017205), and the 111 Project (grant no. B18017).

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  1. Space Environment Simulation Research Infrastructure, Harbin Institute of Technology, Harbin, China

    Jian Zhang

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  1. Jian Zhang
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Correspondence to Jian Zhang.

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Zhang, J. Cavitation luminescence in a hydraulic cone throttle valve: simulation and experiments. Forsch Ingenieurwes 84, 151–160 (2020). https://doi.org/10.1007/s10010-020-00395-1

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  • DOI: https://doi.org/10.1007/s10010-020-00395-1

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