Studies on Draw and Thin Redraw Forming. 1st Report. Experimental Investigation of Optimum Working Conditions for Stretch Draw Forming Using Laminated Sheet.

This research explains the results of an investigation carried out to understand the influence of a microwave incinerated rice husk ash (MIRHA) powder on foamed concrete (FC) hydration. The experimental work was designed using the Taguchi approach. This method was selected to have a target for the optimum working conditions of the parameter that affects some physical properties of concrete mixtures. The loss on ignition (LOI) method was used to establish the nonevaporable water (wn) content at all selected ages of hydration. It was observed that the MIRHA powder showed lower nonevaporable water contents than the normal FC, indicating that MIRHA powder facilitated enhancement in FC hydration. The optimum FC properties were achieved at 10% MIRHA composition as proven from the highest compressive strength. This level corresponds to the highest values in change in nonevaporable water and degree of hydration.

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Experimental Investigation of a Miniature Ejector Using Water as Working Fluid

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4047553 ◽

2020 ◽

Vol 12 (6) ◽

Author(s):

Jingming Dong ◽

Qiuyu Hu ◽

Yuxin Xia ◽

He Song ◽

Hongbin Ma ◽

...

Keyword(s):

Experimental Investigation ◽

High Temperature ◽

Working Conditions ◽

Thermal Energy ◽

Nozzle Exit ◽

Cooling System ◽

Area Ratio ◽

Coefficient Of Performance ◽

Working Fluid ◽

Condensing Pressure

Abstract This paper presents an experimental investigation of a miniature ejector using water as the working fluid. The investigated ejector cooling system can utilize the thermal energy to be removed to power the cooling system and maintain the temperature of an electronic component below ambient temperature. The effects of working conditions, nozzle exit position (NXP), and area ratio on the coefficient of performance (COP) of ejector performance were investigated. Experimental results show that the miniature ejector can function well when the temperature in the high-temperature evaporator (HTE) ranges from 55 °C to 70 °C and can achieve a COP (coefficient of performance) of 0.66. With an increase of the NXP, the COP decreases, while the critical condensing pressure first increases and then decreases. As the area ratio of the miniature ejector increases, the COP increases, and the critical condensing pressure decreases.

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Experimental Investigation on Marine Main Shaft Bearings With Reduced Length to Diameter Ratio

STLE/ASME 2010 International Joint Tribology Conference ◽

10.1115/ijtc2010-41315 ◽

2010 ◽

Cited By ~ 1

Author(s):

Wojciech Litwin

Keyword(s):

Experimental Investigation ◽

Working Conditions ◽

Hydrodynamic Pressure ◽

Diameter Ratio ◽

Main Shaft ◽

Test Rig ◽

The Past ◽

Flexible Support ◽

Shaft Misalignment ◽

Significant Bearing

Water lubricated bearings are often installed on new and modernized ships. The main reasons are: unit simplicity, no danger of pollution and low price. One of the main problems connected with this the bearings of this kind is defining maximum hydrodynamic film capacity. Due to very thin hydrodynamic film and significant bearing bush deformation, the EHL model should be used for calculations. Experimental research conducted in the past was carried out on a single bearing test rig [1, 2, 3]. Unfortunately that test rig has some disadvantages. Its flexible support gives possibility of shaft misalignment for instance in case of asymmetric hydrodynamic pressure film in the bearing. The new test rig, presented in this paper gives wide research possibilities and working conditions are very similar to those on a real ship.

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Study on Trispectrum Characteristics of MR Damper in Vibration Processes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.211-212.285 ◽

2011 ◽

Vol 211-212 ◽

pp. 285-289

Author(s):

Fu Sen Wu ◽

Yi Jian Huang ◽

Shan Xu

Keyword(s):

Time Series ◽

Working Conditions ◽

Dynamic Characteristics ◽

Mr Damper ◽

Ar Model ◽

Vibration Process ◽

New Type ◽

Non Gaussian ◽

Working Parameters ◽

Optimum Working

In order to find out a new type of MR damper for block making machine, the signals of displacement in the vibration process during the test are collected and the time series AR model of trispectrum for analyzing the dynamic characteristics of the MR damper is built. It turns out that , in different working conditions, slices of trispectrum are applied to obtain the signal’s non-Gaussian, nonlinear amplitude-frequency characteristics which are very important for us to select the optimum working parameters of the MR damper.

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Experimental Analysis and Theoretical Research of Electro-Mechanical Characterization of Piezoelectric Stack Actuators

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.1464 ◽

2011 ◽

Vol 197-198 ◽

pp. 1464-1468

Author(s):

Hui Qun Ye

Keyword(s):

Energy Transfer ◽

Working Conditions ◽

Experimental Analysis ◽

Mechanical Characterization ◽

Piezoelectric Materials ◽

Maximum Energy ◽

Theoretical Research ◽

Mechanical Loads ◽

Optimum Working

This paper presents the results of experimental analysis and theoretical research of piezoelectric stack actuators. The key is to understand the behavior of piezoelectric materials mechanical loads in this paper, and to determine optimum working conditions. Based on analysis of some parameters and driven model, which are necessary to performing design optimization to achieve maximum energy transfer and minimum power consume.

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