Simulation Analysis and Test of Hydraulic Balanced Oil-gas Suspension Crossing Performance

Author(s):  
Yafeng Zhang ◽  
Lei Dong ◽  
Xiaoling Han ◽  
Mengyan Xu ◽  
Lilong He
Author(s):  
Yijie CHEN ◽  
Yafeng ZHANG ◽  
Xu ZHANG ◽  
Lu WANG ◽  
Dongliang FENG
Keyword(s):  

2013 ◽  
Vol 827 ◽  
pp. 220-223
Author(s):  
Dong Wang ◽  
Xin Sheng Jiang ◽  
Yi Hong Ou ◽  
Jian Zhong Zhou

This paper is aimed to show that oil gas dispersion model of underground fuel depot are useful for predicting hazardous areas and choosing emergency response strategy. For this purpose, the factors affecting the dispersion process in the long narrow underground fuel depot are analyzed and the simulation model is put forward. The simulation results agree well with the experimental data and show the effects of oil gas flow rate and concentration on the hazardous areas.


Author(s):  
Yijie Chen ◽  
Guanhui Zheng ◽  
Jianjuan Guo ◽  
Yajun Wang ◽  
Dongliang Feng

2013 ◽  
Vol 385-386 ◽  
pp. 184-187
Author(s):  
Yi Jie Chen ◽  
Ya Feng Zhang ◽  
Jian Juan Guo ◽  
Ya Jun Wang ◽  
Dong Liang Feng

Acording to the oil temperature influenced on the seal reliability, this paper put forward to the importance to study the temperature rise of the damping device. The thermodynamics of physical model of oil gas spring under the forced convection condition was established. The heat transfer coefficient expression of the correlation surface and the comprehensive heat transfer equation were deduced. After that, the external force and internal energy change rate of oil and nitrogen were researched. Through the principle of conservation of energy and the real gas state equation, the oil gas spring thermodynamic mathematical model was created. In the end, the external influence factors on the oil temperature rise were analyzed, the conclusion could be used as a reference for the design of damping device.


2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.


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