An experimental study of cavitation damage on tissue of Carassius auratus in a jet fish pump

Long, Xinping; Xu, Mingang; Wang, Jiong; Zou, Jialin; Ji, Bin

doi:10.1016/j.oceaneng.2019.01.052

Cited by 15 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enzyme superoxide dismutase (SOD) is an important antioxidant defence that catalyses the dismutation of the superoxide radical (O 2 ) into oxygen and hydrogen peroxide (Hajam et al ., 2020). Also, alkaline phosphatase (AKP) is an important enzyme that catalyses the hydrolysis of phosphatase monoesters into organic radical and inorganic phosphate (Sharma et al ., 2014), while lactate dehydrogenase (LDH) a key enzyme in anaerobic respiration (Li et al ., 2018) that catalyses pyruvic acid into lactic acid in the metabolism of glucose (Long et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Tolerance of juvenile Peruvian rock seabass (Paralabrax humeralisValenciennes, 1828) and Peruvian grunt (Anisotremus scapularisTschudi, 1846) to low‐oxygen conditions

Montero-Taboada

Sotil

Dionicio-Acedo

et al. 2022

Journal of Fish Biology

View full text Add to dashboard Cite

Hypoxia is currently one of the greatest threats to coastal ecosystems worldwide, generating massive mortality of marine organisms, loss of benthic ecosystems and a decrease in fishery production. We evaluated and compared the tolerance to hypoxia of two species from different habitats of the Peruvian coast, the Peruvian rock seabass Paralabrax humeralis and the Peruvian grunt Anisotremus scapularis. The effect of hypoxia was measured as a function of the exposure time (progressive and chronic) on the behavioural and physiological responses of the two species, as well as on the enzymatic activity associated with the oxidative stress response of lactate dehydrogenase (LDH), superoxide dismutase (SOD) and alkaline phosphatase (AKP). The ventilatory frequency was measured at two different temperatures (16 and 22°C) under progressive hypoxia conditions to determine the ventilatory critical point (Vcp). A. scapularis showed a higher Vcp than P. humeralis, which was positively affected by temperature. The median lethal time of A. scapularis was 36 min at 60% of oxygen saturation, while P. humeralis showed no mortality after 31 days of exposure at 5% oxygen saturation. Different enzymatic activity (P < 0.05) between species under hypoxia was recorded, in SOD (gill and muscle) and AKP (blood). A general tendency, under hypoxia, to slightly increase LDH activity (except for blood in A. scapularis, P < 0.05) and SOD activity (mainly in muscle of A. scapularis, P < 0.05), and decrease AKP activity (mainly in liver of P. humeralis, P < 0.05) was observed. The response of P. humeralis to hypoxia goes through a reduction in activity and metabolism, so this species can be considered hypoxia‐tolerant, allowing it to face hypoxia events during prolonged periods. On the other hand, A. scapularis response to hypoxia prioritizes avoidance mechanisms and, together with other adaptations, makes it especially vulnerable to hypoxia and able to be considered hypoxia‐intolerant.

show abstract

Section: Introductionmentioning

confidence: 99%

Tolerance of juvenile Peruvian rock seabass (Paralabrax humeralisValenciennes, 1828) and Peruvian grunt (Anisotremus scapularisTschudi, 1846) to low‐oxygen conditions

Montero-Taboada

Sotil

Dionicio-Acedo

et al. 2022

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…In addition, with the rapid development of offshore oil and natural gas resource exploration, underwater trenchers have become a research focus in the ocean engineering. The jet pump is the key technology of underwater trencher design [1][2][3]. With the development of engineering, higher requirements are being put forward for the performance of jet pumps in various aspects.…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimization of Jet Pump Based on RBF Neural Network Model

Wang

Zhang

et al. 2021

JMSE

View full text Add to dashboard Cite

In this study, an annular jet pump optimization method is proposed based on an RBF(Radial Basis Function) neural network model and NSGA-II(Non-Dominated Sorting Genetic Algorithm) optimization algorithm to improve the hydraulic performance of the annular jet pump applied in submarine trenching and dredging. Suction angle, diffusion angle, area ratio and flow ratio were selected as design variables. The computational fluid dynamics (CFD) model was used for numerical simulation to obtain the corresponding performance, and an accurate RBF neural network approximate model was established. Finally, the NSGA-II algorithm was selected to carry out multi-objective optimization and obtain the optimal design variable combination. The results show that the determination coefficient R2 of the two objective functions (jet pump efficiency and head ratio) of the approximate model of the RBF neural network were greater than 0.97. Compared with the original model, the optimized model's suction angle increased, and the diffusion angle, flow ratio and area ratio decreased. In terms of performance, the head ratio increased by 30.46% after the optimization of the jet pump, and efficiency increased slightly. The proposed jet pump performance optimization method provides a reference for improving the performance of other pumps.

show abstract

“…The jet pump takes big advantages of having no moving parts, such as rotor and piston, which makes it particularly suitable for pumping mixed fluids containing large amounts of solid particles. Therefore, it has broad application prospects in engineering fields such as emergency draining, hydraulic dredging, and cooling of nuclear reactors [1][2][3]. Compared with the traditional central jet pump, the annular multi-nozzle jet pump can increase the interface surface area between the working fluid and the second fluid in the same conditions, thereby speeding up energy exchange, reducing the length of the throat and the size of the pump, and improving the pump efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The dimensionless pressure ratio h and efficiency η are used to investigate the performance of the pump. The definitions are as follows: 2…”

Section: Introductionmentioning

confidence: 99%

CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump

Wang

et al. 2020

Processes

View full text Add to dashboard Cite

CFD simulation and analysis of the internal flow field of the annular multi-nozzle jet pump are carried out to study the effects of nozzle section geometries on performance of the pump based on the finite volume method and realizable k-ε model. The results show that the square nozzle peak efficiency is 3% higher than that of the circular nozzle and 4.1% higher than that of the triangular nozzle. According to the simulation results, the mixing mechanism of the working fluid and second fluid is analyzed on the basis of the vortex dynamics. The results show the following: the recirculation area and the friction loss of the non-circular nozzle are reduced, and the mixing effect is improved; the streamwise vortex plays a major role in the mixing process and decays to an extremely small value at the end of the throat after attenuating rapidly in the suction chamber; compared with the streamwise vortex, the strength of the spanwise vortex is relatively stronger; the spanwise vortex still fluctuates after developing to a certain extent in the throat; the maximum streamwise vorticity peak value of the square nozzle is 31% more than that of the circular nozzle and 39% more than that of the triangular nozzle; the maximum spanwise vorticity peak value of the square nozzle is 19% less than that of the circular nozzle and 12% less than that of the triangular nozzle.

show abstract

An experimental study of cavitation damage on tissue of Carassius auratus in a jet fish pump

Cited by 15 publications

References 24 publications

Tolerance of juvenile Peruvian rock seabass (Paralabrax humeralisValenciennes, 1828) and Peruvian grunt (Anisotremus scapularisTschudi, 1846) to low‐oxygen conditions

Tolerance of juvenile Peruvian rock seabass (Paralabrax humeralisValenciennes, 1828) and Peruvian grunt (Anisotremus scapularisTschudi, 1846) to low‐oxygen conditions

Multi-Objective Optimization of Jet Pump Based on RBF Neural Network Model

CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump

Contact Info

Product

Resources

About