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Copyright of China Petroleum Machinery is the property of China Petroleum Machinery Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forest Engineering is the property of Forest Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Zhengzhou University: Engineering Science is the property of Editorial Office of Journal of Zhengzhou University: Engineering Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Liaoning Technical University (Natural Science Edition) / Liaoning Gongcheng Jishu Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of Liaoning Technical University (Natural Science) Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Muffler cover of general purpose engine was taken as the research object in this paper and the fluid dynamics analysis software STAR-CCM+ was applied for conducting the numerical simulation study on temperature field analysis of muffler cover. Simulation results showed that the radiation emissivity of materials, thermal boundary conditions and the number of prism layers had great influence on the temperature distribution of muffler cover;the temperature distributions and boundary radiosity distributions of muffler cover for different starter were basically the same, the temperature and boundary radiosity of the side which was far away from fan cooling device was quite high. The simulation value of muffler cover temperatures were basically in good agreement with the experimental values, which indicated that the numerical simulation result of muffler cover temperature had a good feasibility. The research results in this paper can provide a theoretical basis for the early-design and developing of muffler cover for general purpose engine. [ABSTRACT FROM AUTHOR]

Copyright of Railway Standard Design is the property of Railway Standard Design Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forest Engineering is the property of Forest Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

【Objective】The present paper aimed to study the distributions of heat and humidity environment in the intensive curing period.【Method】The CFD model of the standard bulk curing room was established. The large simulation software Fluent was used to conduct systematic numerical simulation of the temperature, humidity and air distribution inside bulk curing room during the baking and color fixing period, and the validity of the model was verified.【Result】Numerical simulation results showed that under the typical air supply parameters in the color fixing period, the temperature in the upper leaf area was the highest, and that in the lower leaf area was the minimum; In the tobacco stacking area, horizontal temperature gradient increased gradually from top to bottom, and the relative humidity at the air inlet area was the lowest, and at the bottom of the door side was the highest; Temperature and humidity showed uneven distribution on the whole. Based on the numerical simulation results, the distributions of temperature, humidity and air distribution in the smoke chamber under the typical air supply parameters in the color fixing period were analyzed. Considering the reasonable energy consumption of the fan and the wind speed between blades, the wind speed of the inlet should be selected from 3.5-4.2 m/s.【Conclusion】The numerical simulation results can provide reference for the internal structure optimization of bulk curing room and the selection of fan intake during the roasting and color fixing period. [ABSTRACT FROM AUTHOR]

In order to reasonably select the shield tunnel end reinforcement method at the construction site, in this paper, a new reinforcement method of shield tunnel end box freezing was selected, and the finite element software was used to analyze the temperature field development law of box freezing wall reinforcement structure, and the optimization design was carried out. Results showed that a complete box-shaped frozen soil curtain can be formed after 40 days of freezing. The maximum thickness of frozen wall was about 2.12 m, and the average temperature was below-10 °C, and the average thickness was greater than 1.6 m. This method was feasible. By increasing the spacing of freezing pipes to reduce the number of freezing pipes, the optimization comparison of three freezing schemes showed that the freezing pipe spacing was within the range of 1.0 m, and the freezing wall formation effect was similar to the original model. When the freezing pipe spacing was 1.0 m, the number of pipes was less and it was more economical. Therefore, the freezing pipe spacing of 1.0 m was the best scheme. By analyzing the relationship between the spacing of freezing pipes and the thickness of freezing wall for 40 days, it was concluded that there was a linear correlation between them. [ABSTRACT FROM AUTHOR]

The steam injection technology of horizontal wells has become an important heavy oil reservoir production technology. Due to the large length of horizontal section and reservoir heterogeneity, the actual steam distribution effect was poor. In this paper. Fluent was used to simulate reservoir temperature changes and reservoir steam absorption capacity under different steam. injection well structures. A three-dimensional material model experiment platform for horizontal well steam distribution was designed. the temperature field changes in reservoirs of different pipe strings under homogeneous reservoirs was analyzed. The results showed that the reservoir temperature and segmented steam absorption amount obtained by uniform perforation string decreased gradually from the heel end to the toe end of injection well. The reservoir temperature and segmented steam absorption amount were uniform by infilling the perforation of toe end. The temperature field development of slit pipe and uniform perforation pipe string mainly focused on the heel end of steam injection well, while the toe end developed slowly or even not. After infilling the perforation of toe end, and the temperature field was basically parallel to the steam injection well to advance equably.. then the uniform steam distribution was realized, which is corresponding to the numerical simulation results. [ABSTRACT FROM AUTHOR]

Copyright of China Sciencepaper is the property of China Sciencepaper and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper, a 50 W LED lamp which was produced by a large state-owned enterprise was tested. The fin type radiator modules were compared by using numerical simulation combined with experimental study. It was found thai under natural convection temperature field the small fin radiator has no advantage. The research found that for natural convection an oblique radiator fin can increase the radiating area, but slow down the air rising speed, reduced to nature. Instead, no fin radiator not only effectively improves the cooling efficiency, but also reduces the manufacturing cost for enterprises. [ABSTRACT FROM AUTHOR]