Results 1 to 10 of about 1,697,755 (307)

Transient Hydrodynamic Characteristics of a High-Speed Axial Flow Water-Jet Pump during Variable Speed Process

open access: yesJournal of Marine Science and Engineering, 2023
To investigate the transient characteristics of high-speed axial flow water-jet pumps during start-up and emergency acceleration as well as to analyze how different accelerations affect the performance of internal flow, the k–ω turbulence model of the ...
Rongsheng Zhu   +6 more
doaj   +1 more source

Experimental Study on PIV Measurement and CFD Investigation of the Internal Flow Characteristics in a Reactor Coolant Pump

open access: yesEnergies, 2023
The nuclear reactor coolant pump (RCP) is the core piece of equipment of a nuclear power plant (NPP). The energy performance and internal flow characteristics of RCPs are revealed by effective measurement methods, which are helpful to understand the flow
Dan Ni   +4 more
doaj   +1 more source

Influence of radial labyrinth seal on pump performance

open access: yesNihon Kikai Gakkai ronbunshu, 2020
Labyrinth seals have been used as non-contacting sealing devices for rotors such as on turbo machines. In recent years, an improvement of the sealing performance of labyrinth seals has been required due to the increasing pressure of turbo machines.
Yuji KANEMORI, Yasuo HANDA
doaj   +1 more source

Response Surface Optimization of the Preparation Process of Compound Yogurt with Cistanche deserticola and Jujube and Evaluation of the Antioxidant Activity of Compound Yogurt with Biosensors

open access: yesShipin gongye ke-ji, 2022
The preparation process of compound yogurt with added cistanche and jujube was optimized using single-factor experiments and response surface curve analysis by applying evaluation indicators including taste, texture, odor, and color.
Bolu SUN   +6 more
doaj   +1 more source

Analysis of the status quo of solar heating under the background of carbon neutrality [PDF]

open access: yesE3S Web of Conferences, 2021
Since 2020, under the market trend of the "carbon peak" and "post-coal reform" era, clean energy heating has ushered in development opportunities. This article mainly introduces the current status of solar combined heat pump, biomass energy, electricity,
Kong Dexia, Liang Jun
doaj   +1 more source

Present status and challenges of underwater acoustic target recognition technology: A review

open access: yesFrontiers in Physics, 2022
Future naval warfare has placed high demands on underwater targets’ target detection, target recognition, and opposition resistance, among other things. However, the ocean’s complex underwater acoustic environment and the evolving “stealth” technology of
Lei Zhufeng   +3 more
doaj   +1 more source

Research on Feature Extraction of Ship-Radiated Noise Based on Compressed Sensing and Center Frequency

open access: yesIEEE Access, 2021
In the field of underwater acoustic signal processing, the ship radiated noise contains a large amount of ship information, which is of great significance to the ship identification.
Zhufeng Lei   +5 more
doaj   +1 more source

On Improvement of Characteristic Instability and Internal Flow in Mixed Flow Pumps

open access: yesJournal of Fluid Science and Technology, 2008
The difference of pump characteristics between two kinds of mixed flow pumps with low specific speed of 350 (min-1, m3/min, m), which have the same impeller and the different diffuser vanes, is presented in the present paper.
Masahiro MIYABE   +4 more
doaj   +1 more source

Prediction approach of compression loss in bent-axis piston pump with cavitation

open access: yesAdvances in Mechanical Engineering, 2022
Compression loss is one of the volumetric losses of bent-axis piston pumps, and its accurate evaluation is the basis for predicting the effective flow rate and volumetric efficiency of bent-axis piston pumps.
Lv-jun Qing   +3 more
doaj   +1 more source

Compressed Sensing Multiscale Sample Entropy Feature Extraction Method for Underwater Target Radiation Noise

open access: yesIEEE Access, 2022
Accurate underwater target detection and recognition in complex marine environments has always been a challenge. There is a lot of information in underwater target radiation noise that is important for underwater target recognition.
Zhufeng Lei   +4 more
doaj   +1 more source

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