An experimental study and mechanism analysis on improving dispersion stability performance of Al2O3 nanoparticles in base synthetic oil under various mixing conditions

In recent years, the trimaran as a novel ship has been greatly developed. The subsequent large vertical motion needs to be studied and resolved. In this article, an experimental study for a trimaran vertical stabilization control is carried out. Three modes including the bare trimaran (the trimaran without appendages, the trimaran with fixed appendages, and the trimaran with controlled appendages) are performed through model tests in a towing tank. The model tests are performed in regular waves. The range of wave period is 2.0–4.0 s, and the speed of the carriage is 2.93 and 6.51 m/s. The results of the three modes show the fixed appendages and the actively controlled appendages are all effective for the vertical motion reduction of the trimaran. Moreover, the controlled appendages are more effective for the vertical stability performance of the trimaran.

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Microcosmic mechanism analysis and experimental study of rock burst fracture based on SEM

Boundaries of Rock Mechanics ◽

10.1201/9780203883204.ch163 ◽

2008 ◽

pp. 873-876

Author(s):

F Li ◽

Z Kang ◽

Y Zhang

Keyword(s):

Experimental Study ◽

Rock Burst ◽

Burst Fracture ◽

Mechanism Analysis ◽

Microcosmic Mechanism

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Toward improved heat dissipation of the turbulent regime over backward-facing step for the AL2O3-water nanofluids: An experimental approach

Thermal Science ◽

10.2298/tsci170606236a ◽

2019 ◽

Vol 23 (3 Part B) ◽

pp. 1779-1789 ◽

Cited By ~ 1

Author(s):

Syed Ahmed ◽

Salim Kazi ◽

Ghulamullah Khan ◽

Mohd Zubir ◽

Mahidzal Dahari ◽

...

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Reynolds Number ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Turbulent Regime ◽

Al2o3 Nanoparticles ◽

Backward Facing Step ◽

Constant Weight ◽

Weight Concentration

Experimental study of nanofluid flow and heat transfer to fully developed turbulent forced convection flow in a uniformly heated tubular horizontal backward-facing step has reported in the present study. To study the forced convective heat transfer coefficient in the turbulent regime, an experimental study is performed at a different weight concentration of Al2O3 nanoparticles. The experiment had conducted for water and Al2O3 -water nanofluid for the concentration range of 0 to 0.1 wt.% and Reynolds number of 4000 to 16000. The average heat transfer coefficient ratio increases significantly as Reynolds number increasing, increased from 9.6% at Reynolds number of 4000 to 26.3% at Reynolds number of 16000 at the constant weight concentration of 0.1%. The Al2O3 water nanofluid exhibited excellent thermal performance in the tube with a backwardfacing step in comparison to distilled water. However, the pressure losses increased with the increase of the Reynolds number and/or the weight concentrations, but the enhancement rates were insignificant.

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Mechanism analysis and experimental study of table-based direct power control

2013 International Conference on Electrical Machines and Systems (ICEMS) ◽

10.1109/icems.2013.6713192 ◽

2013 ◽

Cited By ~ 6

Author(s):

Yongchang Zhang ◽

Changqi Qu ◽

Zhengxi Li ◽

Yingchao Zhang

Keyword(s):

Experimental Study ◽

Power Control ◽

Mechanism Analysis ◽

Direct Power ◽

Direct Power Control

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Experimental study and associated mechanism analysis of horizontal bolted connections involved in a precast concrete shear wall system

Structural Concrete ◽

10.1002/suco.201800113 ◽

2018 ◽

Vol 20 (1) ◽

pp. 282-295 ◽

Cited By ~ 8

Author(s):

Jian Sun ◽

Hongxing Qiu ◽

Hongbo Jiang

Keyword(s):

Experimental Study ◽

Precast Concrete ◽

Shear Wall ◽

Mechanism Analysis ◽

Bolted Connections ◽

Wall System

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Experimental Study on Fault Caused by Partial Arc Steam Forces and Its Economic Solution

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4000090 ◽

2010 ◽

Vol 132 (6) ◽

Cited By ~ 5

Author(s):

Daren Yu ◽

Yanfeng Duan ◽

Jinfu Liu ◽

Zhansheng Liu ◽

Qinghua Hu

Keyword(s):

Experimental Study ◽

Temperature Rise ◽

Mechanism Analysis ◽

Steam Turbines ◽

Practical Test ◽

Full Load ◽

Control Stage ◽

Fault Mechanism ◽

Fault Characteristic

It is noticed in a few steam turbines that there are a pad temperature rise of more than 10°C and a radial journal movement of more than 50 μm in the bearings adjacent to control stage when they operate under partial arc admission at 60–80% of their full load. It is found through fault mechanism analysis and experimental study that the fault is caused by partial arc steam forces acting on control stage. A fault characteristic is concluded to help identify this fault. Diagonal admission is therefore proposed as an economic solution for elimination of this fault and it is proved to be effective through practical test.

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The Experimental Study and Mechanism Analysis on Flotation Separation of Tetradymite and Pyrite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1092-1093.1490 ◽

2015 ◽

Vol 1092-1093 ◽

pp. 1490-1496

Author(s):

Hai Liang Feng ◽

Xiao Kui Che ◽

Qi Zheng ◽

Li Cheng Ma

Keyword(s):

Experimental Study ◽

Chemical Adsorption ◽

Mechanism Analysis ◽

Butyl Xanthate ◽

Mineral Flotation ◽

Ftir Spectral Analysis ◽

The Common ◽

The Difference ◽

Adsorption Quantity ◽

Dithiocarbamate Group

The experimental results of flotation of pure tetradymite and pyrite show that HL-1 is an efficient collector for tetradymite flotation. Comparing to the butyl xanthate, HL-1 has stronger collector ability and higher selectivity. It solves the common problem of the separation of tetradymite and pyrite. The difference of adsorption quantity is consistent with results of the single mineral flotation test. Through the measurements of adsorption, zeta-potential, and FTIR spectral analysis, the flotation mechanism of tetradymite with HL-1 has been discussed. It is concluded that the adsorption of HL-1 on tetradymite surface is chemical adsorption through the dithiocarbamate group of the collector chelating the Bi (III) of tetradymite to form metal complex.

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