matec-conferences.orgの競合サイトトップ10

edp-open.org

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sciencedirect.com

sciencedirect is the world's leading source for scientific, technical, and medical research. explore journals, books and articles.

mdpi.com

MDPI is a publisher of peer-reviewed, open access journals since its establishment in 1996.

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hrpub.org

horizon research publishing(hrpub) is a worldwide open access publisher serving the academic research and scientific communities by launching peer-reviewed journals covering a wide range of academic disciplines. as an international academic organization for researchers & scientists, we aim to provide researchers, writers, academic professors and students the most advanced research achievements in a broad range of areas, and to facilitate the academic exchange between them.

benthamscience.com

Current Medicinal Chemistry covers all the latest and outstanding developments in the field of medicinal chemistry.

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Conscientia Beam is a leading academic journals publishing company. It covers a wide range of academic disciplines including the agricultural sciences, arts and education, biological sciences, business & management, chemistry & materials sciences, computer sciences, economics, energy & environmental sciences, engineering, medical sciences, physical sciences, and the social sciences.

electronicsbeliever.com

The right way to measure power supply efficiency must consider four important factors such as: (1) Use the right measuring tools (2) Sample the parameters correctly (3) Use short connections (4) Give some time before taking measurements Use the Right Measuring Tools Efficiency is the ratio of output power to input power. The output power

sxjs.ac.cn

Aiming at the aero-acoustics problem of an axial flow fan, the aerodynamic and acoustic characteristics of the axial flow fan are analyzed by using detached eddy simulation (DES) and the acoustic analogy method. By analyzing the reasons for noise production, the design direction is determined. Based on the semi-anechoic chamber of AVIC Aerodynamic Research Institute, the noise is tested to verify the reliability of the numerical method. By modifying the structure of the moving blades and adjusting the mounting angle of the stationary blade, the aerodynamic noise of the fan is optimized, and the effect is analyzed. The results show that tip leakage flow leads to a larger low-pressure zone in the 1/3 chord length of the moving blade, and severe flow separation around the trailing edge of the stationary blade, resulting in higher tonal noise at 1BPF (blade passing frequency) and higher broadband noise in the range from 5000−8000 Hz for this axial flow fan. By changing the shape of the moving blade and adjusting the mounting angle of the stationary blade, the strength of the tip leakage flow vortex is reduced, and the interaction between the tip leakage flow vortex and the stationary blade is weakened. The noise at 1BPF, 2BPF, and 3BPF is reduced. The total noise reduction at a specific monitoring point reaches up to 2.2 dB(A).