Calibration and performance assessment of an innovative high-temperature cavitometer

Tzanakis, Iakovos; Hodnett, Mark; Lebon, Bruno; Дежкунов, Н. В.; Eskin, Dmitry

doi:10.1016/j.sna.2016.01.024

Cited by 54 publications

(43 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[11] It has been reported that the cavitation erosion resistance of materials, even if it can be regarded as an independent mechanical property of the material itself, [12] depends on mechanical properties and characteristics such as strain energy, [13] ultimate strength, [14] hardness, [15] roughness [16] as well as the strain hardening ability of the material. [17] Thus, extensive research has been carried out elsewhere [18][19][20][21][22][23] in order to find effective correlations between the cavitation erosion rate and the physical properties of the tested fluids as well as the cavitation erosion rate and the mechanical properties of the tested materials.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery

Tzanakis

Bolzoni

Eskin

et al. 2017

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

The erosion response under cavitation of different steel grades was assessed by studying the erosion rate, the volume removal, the roughness evolution, and the accumulated strain energy. A 20 kHz ultrasonic transducer with a probe diameter of 5 mm and peak-to-peak amplitude of 50 lm was deployed in distilled water to induce damage on the surface of commercial chromium and carbon steel samples. After a relatively short incubation period, cavitation induced the formation of pits, cracks, and craters whose features strongly depended on the hardness and composition of the tested steel. AISI 52100 chromium steel showed the best performance and is, therefore, a promising design candidate for replacing the existing fluid machinery materials that operate within potential cavitating environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery

Tzanakis

Bolzoni

Eskin

et al. 2017

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, at 80% power there was a drop in intensity and deviation from this trend. This is likely attributed to the shielding effects as explained in [16]. A further increase followed as with more power acoustic streaming pushed the accumulated bubbly structures further apart and released the pathway for sound wave propagation.…”

Section: Results and Analysismentioning

confidence: 93%

“…The 4 mm waveguide of the cavitometer probe was submerged to a depth of 80 ± 2 mm. A full account of the cavitometer design and performance can be found elsewhere [16]. Figure 1: Graphical representation of the experimental test rig for measuring cavitation intensity and acoustic streaming A TSI particle image velocimetry (PIV) system measured acoustic streaming velocities along the cavitation zone and in the bulk volume.…”

Section: Methodsmentioning

confidence: 99%

“…In this study, we use a calibrated cavitometer [16] to characterise cavitation development in water and PIV to study acoustic streaming inside and near the cavitation zone. Experiments were performed in water because it is both a convenient and suitable analogue (among the range of possible transparent liquids) to molten aluminium in studies of acoustic cavitation [17].…”

Section: Investigation Of Acoustic Streaming and Cavitation Intensitymentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Acoustic Streaming and Cavitation Intensity in Water as an Analogue for Liquid Metal

2018

Proceedings of the 10th International Symposium on Cavitation (CAV2018)

View full text Add to dashboard Cite

This paper presents an investigation of the evolution of flow structures and cavitation intensity in water as an analogue for a liquid metal under ultrasonic excitation. Results are presented for 20 kHz high-power ultrasound. The input power ranged from 50% (8.5 μm p-p) to 100% (17 μm p-p). To identify the streaming structures and understand the recirculation flows for different vibrational amplitudes of the sonotrode, particle image velocimetry (PIV) measured the velocity field. Simultaneously, a calibrated cavitometer probe measured acoustic intensity in the fluid. The cavitation intensity away from the acoustic source decreased with increasing input acoustic power, but was relatively constant inside the cavitation zone (irrespective of the input power). PIV measurements showed that the direction of the flow pattern was strongly related to the vibrational amplitude of the sonotrode. These results are compared with the predictions of an acoustic cavitation model. The outcome of the present work will help to determine the efficient optimization of ultrasonic processing of liquid metals that is of increasing technological importance.

show abstract

“…It consists of a tungsten probe with a diameter of 4 mm and length of 500 mm, connected to a piezoelectric receiver mounted within a metallic enclosure (Belorussian State University of Informatics and Radioelectronics). A full account of the cavitometer can be found in [8]. Signal acquisition and processing was carried out using a dedicated external digital oscilloscope device (Picoscope) that allowed real-time signal monitoring of the cavitometer sensor's data and ultrasonic parameters.…”

Section: Methodsmentioning

confidence: 99%

Effect of Input Power and Temperature on the Cavitation Intensity During the Ultrasonic Treatment of Molten Aluminium

Tzanakis

Lebon

Eskin

et al. 2015

Trans Indian Inst Met

Self Cite

View full text Add to dashboard Cite

Experimental results of ultrasonic processing of liquid aluminium with a 5 kW magnetostrictive transducer and a 20 mm titanium sonotrode excited at 17 kHz are reported in this study. A unique high-temperature cavitometer sensor, placed at different locations in the liquid melt, measured cavitation activity at various acoustic power levels and different temperature ranges. The highest cavitation intensity in the liquid bulk is achieved below the surface of the sonotrode, at the lowest temperature and when the applied power was 3.5 kW. This two-fold mechanism is related to a) acoustic shielding and b) the tendency of liquid aluminium to release hydrogen when the temperature drops, thus promoting multiple cavitation events. Understanding these mechanisms in liquid metals will result in a major breakthrough for the optimization of ultrasound applications to liquid metal processing.

show abstract

Calibration and performance assessment of an innovative high-temperature cavitometer

Cited by 54 publications

References 27 publications

Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery

Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery

Investigation of Acoustic Streaming and Cavitation Intensity in Water as an Analogue for Liquid Metal

Effect of Input Power and Temperature on the Cavitation Intensity During the Ultrasonic Treatment of Molten Aluminium

Contact Info

Product

Resources

About