Results 1 to 10 of about 16,744 (167)
Analysis of Timing Effect on Flow Field and Pulsation in Vertical Axial Flow Pump
Journal of Marine Science and Engineering, 2021 Vertical axial flow pump device has the characteristics of large flow and low head, which is widely used in pumping station projects with head of 3–9 m. In order to study the influence of the timing effect of the impeller relative flow channel and guide ...
Fan Yang +6 more
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Investigation of Unsteady Pressure Pulsations of Reactor Coolant Pump Passage under Flow Coast-down
Machines, 2023 In order to obtain the pressure pulsations of a reactor coolant pump during flow coast-down conditions, the time-domain characteristics of the flow passage under different times of flow coast-down were calculated by numerical calculation.
Daoxing Ye +5 more
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Chinese Journal of Mechanical Engineering, 2021 Hydraulic pumps are a positive displacement pump whose working principle causes inherent output flow pulsation. Flow pulsation produces pressure pulsation when encountering liquid resistance.
Yan Wang +4 more
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Applied Sciences, 2022 In daily operation, the flow state in the runner chamber of an axial flow pump is extremely complex, and the pressure pulsation caused by the vibration of the unit and the hydraulic excitation is also extremely complex.
Yalei Bai, Donglei Wu
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Turbulence models in pulsating flows [PDF]
39th Aerospace Sciences Meeting and Exhibit, 2001 The performances of four low-Reynolds-number models are compared for the unsteady Reynolds-average d Navier–Stokes equations applied to the ow in a channel driven by a pressure gradient oscillating around a nonzero mean. The models considered are the one-equation Spalart–Allmaras model, the k–" model with the wall functions of Lam and Bremhorst, the k–
A. Scotti, U. Piomelli
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AIP Advances, 2023 Based on steady-state experiments, a three-dimensional (3D) simulation study under pulsation conditions was carried out. This was performed to study the effect of pulsation of the supply system on the atomization characteristics of a gas-centered swirl ...
Yuchao Gao +6 more
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Numerical Study on Internal flow Field Dynamic Performance of Scramjet [PDF]
MATEC Web of Conferences, 2019 The pressure pulsation caused by the combustion of the combustion chamber of the scramjet engine has a great influence on the flow and performance of the inlet.
Gao Feng, Zhao Jie, Chen Feng Li
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Journal of Marine Science and Engineering, 2023 An axial-flow pump as a turbine (PAT), as compared to the conventional Francis turbine, has the advantages of not being restricted by the terrain and having lower cost to reverse the pump as a turbine for power generation.
Fan Yang +5 more
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Frontiers in Earth Science, 2023 Compared with conventional pumped-storage hydroplants, seawater pumped-storage hydroplants are constructed in a complex marine environment. The wave disturbance may affect the safety operation of the pump turbine in the seawater pumped hydroplant via ...
Jianyong Hu +7 more
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Driving pulsation analysis of electro-hydraulic robot
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2020 The hydraulic driving source plays an important role in the performance of the electro-hydraulic robot. In this paper, the Lumped parameter method is used to establish the pressure-flow characteristic model of the constant pressure variable pump of a 6 ...
Changyou ZHANG +4 more
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