2021
DOI: 10.1016/j.ijheatmasstransfer.2021.120970
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Cavitation dynamics and thermodynamic effects at elevated temperatures in a small Venturi channel

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Cited by 87 publications
(37 citation statements)
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“…The turbine braking zone, anti-pump working conditions, and pump braking working conditions were not tested. The test conditions were consistent with the parameters listed in Table 4 (6,14,18, and 20 are the opening angles, −1 represents the turbine mode, and −2 represents the pump mode). The axial velocity of each working condition on the draft tube test plane was obtained via the LDV test, and the time-averaged axial velocity and circumferential velocity distribution trends of each working condition are shown in Figure 7.…”
Section: Analysis Of Ldv Test Resultsmentioning
confidence: 97%
See 1 more Smart Citation
“…The turbine braking zone, anti-pump working conditions, and pump braking working conditions were not tested. The test conditions were consistent with the parameters listed in Table 4 (6,14,18, and 20 are the opening angles, −1 represents the turbine mode, and −2 represents the pump mode). The axial velocity of each working condition on the draft tube test plane was obtained via the LDV test, and the time-averaged axial velocity and circumferential velocity distribution trends of each working condition are shown in Figure 7.…”
Section: Analysis Of Ldv Test Resultsmentioning
confidence: 97%
“…The rapid and frequent switching between pumping and power generation modes, as well as the prolonged operation under off-design conditions, pose technical challenges for pump turbine design [5]. The draft tube vortex rope is a cavitation phenomenon that may appear in the draft tube when the water pump turbine is operated in off-design conditions, and several studies have been carried out using Venturi channels to elucidate the mechanisms underlying it [6][7][8][9][10]. The appearance of the vortex rope corresponds to the intensity of the vortex at the exit of the runner.…”
Section: Introductionmentioning
confidence: 99%
“…6 a presents the variation of cavity length along with temperature change at five cavitation numbers. The cavity length is determined at the closure of the time-averaged cavity outline, which is extracted based on the “maximum standard deviation threshold” as detailed in [51] . The uncertainty on is inferior to 2%, according to the convergence analysis performed with various parameters, such as the diverse number of images used, effects of the gray level thresholds for the binarization and filters used for snapshots, etc.…”
Section: Resultsmentioning
confidence: 99%
“…The camera was installed on the left side of the flow channel. Since the experiment was conducted under low-light conditions, 250 fps was selected to illuminate the PIV particles in the laser sheet to have a clear resolution [19,20]. The images captured by the CCD camera were then processed using Cactus ver.3.3 using the grey-level cross-correlation algorithm for particle tracking [21].…”
Section: Model Test Methodsmentioning
confidence: 99%