Hydrodynamic Nuclei Concentration Technique in Cavitation Research and Comparison to Phase-Doppler Measurements

9th International Symposium on Cavitation

Ebert, Eric^1 ; Kröger, Willfried^1 ; Damaschke, Nils^1

Institute for General Electrical Engineering, Photonics and Optoelectronics, Albert-Einstein-Straße 2, Rostock

18059, Germany^1

关键词: Acquisition time;    Bubble concentration;    Cavitation inception;    Cavitation tunnels;    Number concentration;    Type classifications;    Verification experiments;    Water quality measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012111/pdf
DOI  :  10.1088/1742-6596/656/1/012111

来源: IOP

【 摘 要 】

Small particles, especially bubbles in the micro-meter range, influence the cavitation of the propellers. The prediction of cavitation inception and water quality measurements are important in cavitation research. The Hydrodynamic Nuclei Concentration (HDNC) technique can be used for reliable bubble concentration measurements in fluid flows. The HDNC technique bases on the analysis of scattered light from the cavitation nuclei in the water. The HDNC technique can distinguish between bubbles and solid particles. The particle type classification is important, because the number concentration of solid particles is often much higher than the nuclei concentration in cavitation tunnels and in seawater. Verification experiments show, that the HDNC technique reaches similar capabilities in number concentration estimation as Phase Doppler (PD) technique in much shorter acquisition time.