|
|
|
|
|
Frank A. Plua, Francisco-Javier Sánchez-Romero, Victor Hidalgo, Petra Amparo López-Jiménez and Modesto Pérez-Sánchez
The selection of pumps as turbines (PATs) for their respective use in energy optimisation systems is a complicated task, because manufacturers do not provide the characteristic curves. For this reason, some research has been carried out to predict them w...
ver más
|
|
|
|
|
|
|
|
|
|
|
Linmin Shang, Jingwei Cao, Xin Jia, Shengrui Yang, Sainan Li, Lei Wang, Zhengwei Wang and Xiaobing Liu
The pumped storage power station plays a vital role in modern power systems, where the key component is the pump turbine. Variable-speed operation can improve the operating efficiency of the pump turbine and increase the operating efficiency under turbin...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rongsheng Zhu, Wenhao Shi, Gongchang Gan, Huairui Li, Dawei Yang, Yuchen Duan and Qiang Fu
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?? turbulence model of the SS...
ver más
|
|
|
|
|
|
|
|
|
|
|
Liqi Zhang and Yonghui Zhao
Advanced rotational variable-swept missile wings require the ability to rapidly deploy, retract and reach the designated position. Therefore, the establishment of an effective time-varying aeroelastic model of a rotating missile wing is the prerequisite ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Tae-Youl Jeon and Byung-Gun Jung
Since the variable-speed seawater pump and the three-way valve of a ship?s central cooling system are forms of feedback from the same output signal, these controllers may cause interference when they are not coordinated. Therefore, studying an efficient ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Qingzhen Zhu, Zhihao Zhu, Hengyuan Zhang, Yuanyuan Gao and Liping Chen
The traditional air-assisted side-deep fertilization device has some problems, such as inaccurate control system parameters and poor precision in variable fertilization. It seriously affects the application and popularization of the device. Aiming at the...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wenliao Du, Xukun Hou and Hongchao Wang
It is difficult to accurately extract the health index of non-stationary signals of rolling bearings under variable rotational speed, which also leads to greater prediction error for bearing degradation models with fixed parameters. For this reason, an a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Piotr Kosior, Piotr Kuropka, Maciej Janeczek, Marcin Mikulewicz, Wojciech Zakrzewski and Maciej Dobrzynski
The purpose of this study was to present the level of bone tissue deformation after drilling under variable conditions in three different dental implant systems in a microscopic analysis. Straumann, Osstem, and S-Wide systems were used to drill boreholes...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hyeonmin Jeon and Jongsu Kim
In the case of DC power distribution-based variable speed engine synchronous generators, if the output reference voltage is kept constant regardless of the generator engine operating speed, it may cause damage to the internal device and windings of the g...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andrés Bravo Cuesta, Francisco Javier Gomez-Gil, Juan Vicente Martín Fraile, Jesús Ausín Rodríguez, Justo Ruiz Calvo and Jesús Peláez Vara
The aim of this study was to propose and evaluate a very small wind turbine (VSWT) that competes with commercial grid-connected VSWTs in terms of simplicity, robustness and price. Its main components are a squirrel-cage induction generator (SCIG) driven ...
ver más
|
|
|
|
|
|