Experimental study on the effects of feeding pipe diameter on the cavitation erosion performance of self-resonating cavitating waterjet

Deng, Li; Kang, Yong; Ding, Xiaolong; Liu, Wenchuan

doi:10.1016/j.expthermflusci.2016.11.029

Cited by 44 publications

(28 citation statements)

References 34 publications

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“…A schematic diagram of the experimental setup for measuring the axial pressures of SRWJs under different values of the downstream contraction ratio is shown in Figure 2. It should be noticed that the experimental method and the main equipment and facilities shown in the figure were all the same with those used in our previous investigations [25][26][27][28][29][30][31][32], except for the organ-pipe nozzles. Therefore, the schematic of the experimental set-up is the same as the previous ones [31,35].…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Nominal pressure (MPa) 40 Burst pressure (MPa) 100 Accuracy ≤±0.5% FS Influence effects of supply (10 V) 0.05% FS Influence effects of load (kΩ) 0.05% Thermal error (10 K) ±0.5% FS Figure 2. The schematic of the experimental setup for measuring the axial pressures [28,[33][34][35].…”

Section: Bd Sensorsmentioning

confidence: 99%

“…Ding et al [25] took advantage of SRWJs to improve the mechanical properties of the aluminum alloy and claimed that the hardness and residual stress could be increased by 61.69% and 148%, respectively. In addition, the authors have already conducted a series of experiments on SRWJs, such as the effects of the nozzle inner surface roughness, feeding pipe diameter, and the area discontinuity at the nozzle inlet on the characteristics of pressure oscillations and cavitation erosion of the jet [26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…Despite a great many investigations on SRWJ, it should be noticed that the optimal values of the downstream contraction ratio of organ-pipe nozzles are still unknown and need to be studied. So far, the organ-pipe nozzles used in the research are all manufactured using an equation that only gives the ratio of the chamber length to the exit diameter [13][14][15][16][17][18][19][20][21][22][25][26][27][28][29][30][31][32], and the detailed physical parameters required for fabricating an effective nozzle have not been reported.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of the Downstream Contraction Ratio of Organ-Pipe Nozzle on the Pressure Oscillations of Self-Resonating Waterjets

et al. 2018

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Self-resonating waterjets (SRWJs) are being widely used in the fields of energy exploitation, due to the significantly increased penetration rate of roller bits in deep-hole drilling. To further improve the impact and erosion abilities of SRWJs, the effects of the downstream contraction ratio of organ-pipe nozzle on the axial pressure oscillations were experimentally studied. The axial pressure oscillation peak and amplitude were used to evaluate the effects under two inlet pressures and various standoff distances. The results show that the downstream contraction ratio can affect the development trends of the pressure oscillations and determines the values of the peaks and amplitudes. Under the experimental conditions, 2.5 is the ratio that leads to the maximum peaks and amplitudes at almost all the testing standoff distances, while the ratio of 2 always results in the minimum ones. The development trend of the pressure oscillation peak for the ratio of 3.5 has a great change at an inlet pressure of 20 MPa. Generally, the relative pressure oscillations are more violent at an inlet pressure of 10 MPa, which is regardless of the contraction ratio. This study helps provide a guideline for determining the physical parameters required in the fabrication of organ-pipe nozzles used for deep-hole drilling.

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Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Bd Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effects of the Downstream Contraction Ratio of Organ-Pipe Nozzle on the Pressure Oscillations of Self-Resonating Waterjets

et al. 2018

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“…According to the different exit boundary conditions, waterjets are divided into free and confined jets [11][12][13]. For confined jets, the external flow field is confined by solid walls.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Influence of a Double-Walled Confined Width on the Velocity Field of a Submerged Waterjet

et al. 2017

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Abstract:The current research on confined submerged waterjets mainly focuses on the flow field of the impinging jet and wall jet. The double-sided wall vertically confined waterjet, which is widely used in many fields such as mining, cleaning and surface strengthening, has rarely been studied so far. In order to explore the influence of a double-sided wall confined width on the velocity field of submerged waterjet, an experiment was conducted with the application of 2D particle image velocimetry (PIV) technology. The distribution of mean velocity and turbulent velocity in both horizontal and vertical planes was used to characterize the flow field under various confined widths. The results show that the vertical confinement has an obvious effect on the decay rate of the mean centerline velocity. When the confined width changes from 15 to 5, the velocity is reduced by 20%. In addition, with the decrease of the confined width, the jet has a tendency to spread horizontally. The vertically confined region induces a space hysteresis effect which changes the location of the transition region moving downstream. There are local negative pressure zones separating the fluid and the wall. This study of a double-walled confined jet provides some valuable information with respect to its mechanism and industrial application.

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Experimental investigation of the preferred Strouhal number used in self-resonating pulsed waterjet

Chen

Kang

et al. 2018

J Mech Sci Technol

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Experimental study on the effects of feeding pipe diameter on the cavitation erosion performance of self-resonating cavitating waterjet

Cited by 44 publications

References 34 publications

The Effects of the Downstream Contraction Ratio of Organ-Pipe Nozzle on the Pressure Oscillations of Self-Resonating Waterjets

The Effects of the Downstream Contraction Ratio of Organ-Pipe Nozzle on the Pressure Oscillations of Self-Resonating Waterjets

Experimental Investigation on the Influence of a Double-Walled Confined Width on the Velocity Field of a Submerged Waterjet

Experimental investigation of the preferred Strouhal number used in self-resonating pulsed waterjet

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