The 718th Research Institute of CSIC

Handan, China

The 718th Research Institute of CSIC

Handan, China
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Zhang L.,The 718th Research Institute of CSIC | Dong Y.,The 718th Research Institute of CSIC
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2013

The CO2 absorption in different alkanolamine solutions in a high gravity rotating bed packed with metal form has been studied. The experimental results indicate that different alkanolamine solution has different efficiency on CO2 absorption, with monoethanolamine solution the highest. The mass transfer can be enhanced with the increase of bed rotating speed and alkanolamine concentration. Volumetric mass transfer coefficient KGa tends to increase with increasing liquid flow, but the growth rate gradually decreases. The KGa first increases and then decreases with the absorption temperature.


Guo J.-Z.,Tianjin University | Guo J.-Z.,The 718th Research Institute of CSIC | Liu T.-G.,Tianjin University | Niu Z.-F.,The 718th Research Institute of CSIC | Ren X.-M.,The 718th Research Institute of CSIC
Wuli Xuebao/Acta Physica Sinica | Year: 2013

Master oscillator power-amplifier (MOPA) configuration was widely used in high-power laser system. In order to find the optimal ratio of oscillator to amplifier, influences of this ratio on the near-field intensity distribution and the output power were studied. Fast Fourier transform method was used to calculate the near-field intensity distribution and the powers at the ratios of 1:4, 1:1 and 2:1. The simulation results indicated that when the total volume of the gain is constant, the output power of the oscillator increases with the ratio. The results also showed that the diffraction influence increases with the length of the amplifier. It was noted that the ultimate output power of the laser system was affected by the ratio of oscillator to amplifier intensity, when the laser was run at the same gain distribution, saturable intensity, amplification of the unstable oscillator, size of the whole laser and various losses of the cavity. © 2013 Chinese Physical Society.


Wei L.,The 718th Research Institute of CSIC | Huang Y.,Nanjing University of Technology
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2015

Porous ceramic membranes on macroporous metal support without any intermediate layer were prepared by a solid-state particle sintering assisted with carbon. Nano-scale TiO2 particle and macroporous stainless-steel tube were employed as membrane material and support, respectively. For surface coating, polyvinyl alcohol (PVA) was used as adhesive agent, and dip-coating procedure was performed. Effect of different sintering atmosphere (i.e., nitrogen and air) during the preparation of porous ceramic membrane was investigated. For characterization, scanning electron microscopy, X-ray diffraction, thermogravimetry and porometry analyses were conducted, respectively. It was found that serious peeling of the ceramic membrane was occurred when the coated sample was heat-treated in air, but an integrated membrane was achieved when the sintering atmosphere was replaced with nitrogen. Owing to the existence of carbon generated by the carbonization of PVA in nitrogen at high temperature, the mixed structure of TiO2 and carbon can help to weaken the membrane sintering stress which is caused by poor quality of the support surface and by mismatch of the thermal-expansion-coefficients of ceramic and metal. After the sintering of TiO2 particle, the generated carbon can be removed by heat-treatment in air, resulting in a porous TiO2/stainless-steel membrane. The membrane thickness and mean pore size are 10 μm and 0.21μm, respectively, and the corresponding nitrogen flux is 1.72 m3/(m2·h·kPa) at room temperature. ©, 2015, Science Press. All right reserved.


Zhou X.,The 718th Research Institute of CSIC | Ren X.,The 718th Research Institute of CSIC | Li Z.,The 718th Research Institute of CSIC | Guo J.,The 718th Research Institute of CSIC
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2013

This article expatiates the theory of the thermal-structural-optical (TSO) integrated analysis and interface polynomial. The integrated analysis method was applied to the laser optical system. First of all, the thermal analysis and structure analysis of the optical system were analyzed by FEA software. Then the analyzed data were picked up and made Zernike surface fitting by software. Finally, the influence of the thermal deformation on the beam quality was analyzed by optical software. The results show that the integrated analysis can analyze the influence of optical mirror thermal deformation, and can guide optical system design in the laser optical system.


Guo J.,Tianjin University | Guo J.,The 718th Research Institute of CSIC | Liu T.,Tianjin University | Wang Z.,The 718th Research Institute of CSIC | And 2 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2012

To meet the requirements for far-field laser beam irradiation strength, and reduce the impact of thermal effect on the output beam performance, this paper introduces a lower order aberration correction method based on beam shaping. According to the beam wavefront distortion, the method dynamically adjusts the space between shaping mirrors to produce opposite aberrations to correct the aberrations of the first four orders, through the rapid action of the high-precision translation stage and the fast steering mirror, and then the output beam recovers and emits parallelly. The method significantly reduces the thermal drift and thermal distortion of the laser beam, and avoid the long-time continuous beam radiation while running. It features large correction range, control convenience and compact structure, and can greatly improve the quality of the laser output beam and the effect of the laser beam far-field.


Cai X.-B.,The 718th Research Institute of CSIC | Liu D.-Y.,The 718th Research Institute of CSIC
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2010

Measurement uncertainty of gamma-ray detectors for gamma spectrum logging were evaluated, and established a mathematical model to identify the elements constitute about the measurement uncertainty, resolution was 8.958%, the relative combined standard uncertainty was 1.065%, k =1. According to evaluation result, detector would be normally made use of gamma spectrum logging tool.


Cai X.-B.,The 718th Research Institute of CSIC | Liu D.-Y.,The 718th Research Institute of CSIC
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2010

The gamma-ray energy spectrum test device is a key that gamma-ray energy spectrum logging tool achieve consistency test. It introduces test device, with a focus on the implementation process of device development and testing to verify the results of comparison, the performance results show that the devices are up to target the development of requirements, the successful completion of project development.


Cao W.,Harbin Institute of Technology | Fu Y.-J.,The 718th Research Institute of CSIC | Wang C.,Harbin Institute of Technology | Wei Y.-J.,Harbin Institute of Technology
Tuijin Jishu/Journal of Propulsion Technology | Year: 2012

To predict the off-design performance of bubbly water ramjet, the mathematical models were constructed under some assumptions. The thrust and propulsion efficiency were obtained by numerical simulation. The influences of gas mass flow rate, ship velocity and ambient pressure on the performance were emphatically investigated for a comprehensive understanding of bubbly water ramjet. Results indicate that the thrust increases with increasing gas mass flow rate, but the efficiency decreases. When the ship velocity is higher than the design value, the thrust is higher. However, the maximum efficiency is obtained at the design ship velocity. With increasing ambient pressure, both the thrust and propulsion efficiency decrease. By means of regulating the gas mass flow rate with feedback, it can drive the ramjet output the thrust close to the drag of the vehicle, and then the uniform navigation is achieved at arbitrary velocity in the range of the work speed.


Chen H.,The 718th Research Institute of CSIC | Zhang H.,The 718th Research Institute of CSIC | Xu D.,The 718th Research Institute of CSIC
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2011

The reaction of preparing 2, 6-diphenylphenol from tricyclic ketones over Pd/Al2O3 was studied in a fixed bed reactor. By analyzing the composition of products with different residurence time of tricyclic ketones in the reactor, the dehydrogenation mechanism of tricyclic ketones and the relative speed in each step were speculated. The dehydrogenation mechanism of tricyclic ketones was thought that the irreversible catalytic reaction takes place first on cyclohexenyl and cyclohexylidene, then the dehydrogenation on cyclohexanone ring and finally the dehydrogenation of cyclohexyl to target product. The slow rate of cyclohexyl was a key factor in low yield of 2, 6-diphenylphenol. The target product would continue to generate a small amount of byproduct due to excessive dehydrogenation, hydrogenolysis and isomerization.


Fu Y.-J.,The 718th Research Institute of CSIC
Tuijin Jishu/Journal of Propulsion Technology | Year: 2013

To predict the off-design performance of mist jet engine, the mathematical models were constructed under some assumptions. The thrust and propulsion efficiency were obtained by numerical simulation. The effects of ship velocity and ambient pressure on the performance were emphatically investigated for a comprehensive understanding of mist jet engine. When the ship velocity is higher than the design value, the gas mass flow rate must be increased. In this condition, the engine works with higher efficiency and less thrust. With increasing ambient pressure, less gas needs to be injected, but the thrust and propulsion efficiency of the engine decrease. By means of regulating the gas mass flow rate and initial pressure with feedback, it can drive the engine output the thrust close to the drag of the vehicle with varied velocity.

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