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飞机发动机室内开车尾气排放引射喷淋降温仿真分析
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作者 李冬梅 任战鹏 马建军 《装备环境工程》 CAS 2020年第12期109-114,共6页
目的将气候实验室飞机发动机开车时产生的高温高噪声尾气实时顺利排出室外,保持试验所需的稳定环境场,避免排气不畅或可能的高温尾气回流对试验及试验设施产生破坏,保证试验安全可靠进行。方法设计一套发动机开车尾气排放系统,对关键的... 目的将气候实验室飞机发动机开车时产生的高温高噪声尾气实时顺利排出室外,保持试验所需的稳定环境场,避免排气不畅或可能的高温尾气回流对试验及试验设施产生破坏,保证试验安全可靠进行。方法设计一套发动机开车尾气排放系统,对关键的气体引流喷淋降温进行CFD数值模拟。结果喷流环孔径、喷射角度及数量分布均直接影响引射喷淋雾化效果。结论获得可以满足发动机开车尾气排放塔出口温度分布的喷淋环参数,指导引流管喷淋环的详细设计。 展开更多
关键词 气候实验室 飞机发动机开车 尾气排放 喷淋降温 仿真计算
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民用飞机实验室发动机低温启动试验可行性分析
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作者 马建军 《科技与创新》 2020年第2期35-39,共5页
大涵道比发动机在实验室开门时,对在室内展开发动机低温启动/慢车试验的可行性进行了分析。分析了通过管道的排气量与实验室升温速率之间的关系,设计了将发动机内涵和外涵排气分割处理的排气方式,只将内涵排气通过管道排出实验室,减少... 大涵道比发动机在实验室开门时,对在室内展开发动机低温启动/慢车试验的可行性进行了分析。分析了通过管道的排气量与实验室升温速率之间的关系,设计了将发动机内涵和外涵排气分割处理的排气方式,只将内涵排气通过管道排出实验室,减少室外空气的引入量,降低实验室升温速率。针对两种不同管道入口距离对发动机的影响进行了CFD仿真分析。结果表明,排气管道入口在尾椎末端时,对发动机性能影响甚微,实验室可在打开门的情况下,进行发动机启动试验,单次试验时间不超过3.5 min,实验室温度上升不超过5℃。 展开更多
关键词 气候实验室 发动机开车 尾气排放 CFD
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Automated bolting and meshing on a continuous miner for roadway development 被引量:4
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作者 van Duin Stephen Meers Luke +1 位作者 Donnelly Peter Oxley Ian 《International Journal of Mining Science and Technology》 SCIE EI 2013年第1期55-61,共7页
Automated installation of primary roof support material can potentially increase productivity and operator safety in the roadway development process within underground coal mining. Although the broader manufacturing s... Automated installation of primary roof support material can potentially increase productivity and operator safety in the roadway development process within underground coal mining. Although the broader manufacturing sector has benefited from automation, several challenges exist within the Australian underground coal industry which makes it difficult to fully exploit these technologies. At the University of Wollongong a series of reprogrammable electromechanical manipulators have been designed to overcome these challenges and automatically handle the installation of roof and rib containment consumables on a continuous miner. The automated manipulation removes personnel from hazards in the immediate face area, particularly those associated with working in a confined and unstable working environment in close proximity to rotating and moving equipment. In a series of above ground trials the automated system was successfully demonstrated without human intervention and proven to be capable of achieving cycle times at a rate of 10 m per operating hour, consistent with that required to support high capacity longwall mines. The trials also identified a number of refinements which could further improve both cycle times and system reliability when considering the technology for underground use. The results have concluded that conventional manual handling practices on a continuous miner can be eliminated, and that the prototypes have significantly reduced the technical risk in proceeding to a full underground trial. 展开更多
关键词 Automation Robotics Roadway development Manipulation Roof support
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