Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
In order to improve the antiwear characteristics of the double-vane self-priming pump, the surface structure of the was extracted and reconstructed according to bionic principles. Three types of nonsmooth surface models were established at the outlet end of the suction surface of the vanes, which is the most severely worn in the double-vane pump. The external characteristics, pressure field distribution, wear area distribution, and wear degree of the volute and vanes at different concentrations of nonsmooth vane structure were investigated by numerical simulation to reveal the mechanism of the nonsmooth surface structure of the wear characteristics of the vanes. The results show that the head and efficiency of pumps with four different vanes decrease and the average wear rate increases as the particle concentration increases. The different vane structures have a very small effect on the wear resistance of the volute, but a larger effect on vane wear. The circular nonsmooth surface structure, which reduces the low pressure area of the inlet section of the impeller while ensuring a smaller drop in head and efficiency, produces the best antiwear effect and improves the antiwear performance of the double-vane pump.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057078 | PMC |
| http://dx.doi.org/10.1155/2022/4442417 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A convolutional neural network-long short-term memory (CNN-LSTM)-Attention model based on wavelet transform for predicting non-stationary wind pressure coefficients on the surface of terminal glass curtain wall.
Sci Prog
August 2025
Airport College, Civil Aviation Flight University of China, Luocheng, China.
In this paper, a neural network model combining wavelet decomposition and attention mechanism is proposed for the accurate prediction of non-stationary wind pressure on the surface of the glass curtain wall of an airport terminal building under strong wind conditions. The traditional methods often prove difficult in capturing local features and time-frequency variations of non-smooth signals when dealing with them, resulting in limited prediction accuracy. The proposed methodology involves a two-step process.
View Article and Find Full Text PDFUnderwater Drag Reduction Applications and Fabrication of Bio-Inspired Surfaces: A Review.
Biomimetics (Basel)
July 2025
School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China.
As an emerging energy-saving approach, bio-inspired drag reduction technology has become a key research direction for reducing energy consumption and greenhouse gas emissions. This study introduces the latest research progress on bio-inspired microstructured surfaces in the field of underwater drag reduction, focusing on analyzing the drag reduction mechanism, preparation process, and application effect of the three major technological paths; namely, bio-inspired non-smooth surfaces, bio-inspired superhydrophobic surfaces, and bio-inspired modified coatings. Bio-inspired non-smooth surfaces can significantly reduce the wall shear stress by regulating the flow characteristics of the turbulent boundary layer through microstructure design.
View Article and Find Full Text PDF(Sub-)microscale patterning microcontact printing (μCP): recent advances, applications and future perspectives.
Soft Matter
August 2025
Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany.
Microcontact printing (μCP) is a versatile and low-cost technique for surface patterning, allowing for the fabrication of intricate designs with relative ease. However, despite these clear advantages, the application of μCP has predominantly focused on smooth, uniform surfaces, while rough, capillary-active, or hydrogel surfaces have largely been neglected in existing literature. This article aims to review the latest advances in μCP, tracing the evolution of patterning techniques and highlighting recent applications across various fields.
View Article and Find Full Text PDFA damage zone detection method in concrete hydraulic structures based on multi-frequency ultrasonic characteristics.
Sci Rep
April 2025
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China.
To avoid severe threats to the safety of people's lives and property caused by the ultimate collapsing of damaged concrete hydraulic structures and to overcome the technical bottleneck related to the low precision level of conventional acoustic non-destructive testing methods in distinguishing between different structural characteristics of damaged areas, this article focuses on the shortcomings in accuracy and detection capability of current acoustic technologies for damage detection in concrete structures. Different damaged areas of concrete structures exhibit distinct characteristics of frequency acoustic signals, and these multi-frequency ultrasonic characteristics were studied in this research to improve the detection method of damaged areas in concrete hydraulic structures. First, a damage area detection model that can synchronously reflect the non-smooth surface and multi-layer structural characteristics of the damaged area was established based on the real-state characteristics of concrete damage areas, providing a theoretical basis for the fine detection of the internal characteristics of concrete structures.
View Article and Find Full Text PDFExtraction of a high-fidelity 3D medial axis is a crucial operation in CAD. When dealing with a polygonal model as input, ensuring accuracy and tidiness becomes challenging due to discretization errors inherent in the mesh surface. Commonly, existing approaches yield medial-axis surfaces with various artifacts, including zigzag boundaries, bumpy surfaces, unwanted spikes, and non-smooth stitching curves.
View Article and Find Full Text PDF