Development of stand for visualization and experimental study of working process in vortex jet device

The shortage of oil resources and aggravation of environmental pollution drive the whole world look for new alternative fuel for vehicles. By virtue of the renewability and burning cleanability, ethanol has become one of the research priorities for alternative fuel for vehicles at home and abroad. Based on the GT-Power software, a model of the internal combustion engine was established, the working process of the engine using ethanol gasoline as the fuel was simulated, and the experiment platform was established to verify the validity of the simulation model.

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Development of a methodology for calculating the working process of a small-size two-stroke internal combustion engine

VESTNIK of the Samara State Aerospace University ◽

10.18287/2541-7533-2021-20-3-97-109 ◽

2021 ◽

Vol 20 (3) ◽

pp. 97-109

Author(s):

V. V. Biryuk ◽

A. A. Gorshkalev ◽

M. O. Zakharov ◽

V. L. Larin

Keyword(s):

Experimental Study ◽

Internal Combustion Engine ◽

Internal Combustion Engines ◽

Combustion Engine ◽

Experimental Studies ◽

Internal Combustion ◽

Maximum Speed ◽

Combustion Engines ◽

Working Process ◽

Power Characteristics

On the basis of the available theoretical calculations, methods for calculating the working process and power characteristics of internal combustion engines and the experimental studies carried out, a method for calculating the working process for small-sized two-stroke internal combustion engines was developed and tested. In the course of this work, the following results were obtained: the parameters of the working process and power characteristics of a small two-stroke internal combustion engine; the parameters obtained by calculation during the study of the Evolution 20GX2 engine were compared with the results of an experimental study. According to the results of the comparison, deviations in the values of the parameters of the engine under study from the results of the experimental study at the maximum power and maximum speed modes were identified.

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Modeling and Experimental Study on Dynamic Characteristics of Dual-Mass Flywheel Torsional Damper

Shock and Vibration ◽

10.1155/2019/5808279 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Long Chen ◽

Wen-ku Shi ◽

Zhi-yong Chen

Keyword(s):

Experimental Study ◽

Dynamic Condition ◽

Excitation Amplitude ◽

Model Verification ◽

Test Method ◽

Torsional Stiffness ◽

Frictional Torque ◽

Working Process ◽

Working Principle ◽

And Performance

Theoretical modeling and experimental research are carried out on the dynamic torsional characteristics of a dual-mass flywheel (DMF) in this paper. Firstly, the structure and working principle of the DMF are analyzed. Secondly, the arc spring is analyzed by the discrete element method. For the different frictional torques in the working process, the linear fitting and equivalent energy methods are used to model the frictional torque under the dynamic condition of the arc spring. The fractional derivative model is used to model the viscous damping of DMF. Then, the parameter identification and model verification are carried out on the model, and the model error is analyzed. Finally, an experimental study on the dynamic torsional characteristics of DMF is carried out. The results demonstrate that the torsional stiffness of the DMF varies with the excitation amplitude and frequency. This modeling and test method can be used for structural design and performance prediction analysis of DMF.

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Theoretical Analysis and Experimental Research on Cluster Bomb Warhead Built Pressure Device Based on Mechanical Mechanics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.644.260 ◽

2013 ◽

Vol 644 ◽

pp. 260-264

Author(s):

Han Zhang

Keyword(s):

Experimental Study ◽

Rocket Engine ◽

Pressure Rise ◽

Calculation Model ◽

Pressure Chamber ◽

Pressure Curve ◽

Pressure Balance ◽

Working Process ◽

Cluster Bomb ◽

Working Section

This paper according to a certain type of cluster bomb warhead built pressure chamber technical index requirements, design process a set of gas pressure device built principle prototype, and experimental study was carried out. Based on gas build pressure device working process research has determined its three working section: pressure rise section, pressure balance segment and pressure drop section, and then according to the rocket engine interior ballistic principle for each work period respectively calculated, get gas build pressure device and build pressure chamber of the interior ballistic pressure curve, and finally use of principle prototype experimental study. The theoretical calculation curve and test the measured curve have very good consistency; prove this paper established pressure calculation model is reasonable and credible for future related problems research provides a basis.

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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