Light screen velocity measuring method with unique advantages has been widely used in the velocity measurement of various moving bodies.For large air resistance and friction force which the big moving bodies are subje...Light screen velocity measuring method with unique advantages has been widely used in the velocity measurement of various moving bodies.For large air resistance and friction force which the big moving bodies are subjected to during the light screen velocity measuring,the principle of velocity correction was proposed and a velocity correction equation was derived.A light screen velocity measuring method was used to measure the velocity of big moving bodies which have complex velocity attenuation,and the better results were gained in practical tests.The measuring uncertainty after the velocity correction was calculated.展开更多
Erosive burning is a common burning phenomenon of the gunpowder with inner holes.The actual combustion law of the gunpowder with inner holes can be changed by erosive burning.Pressure difference between the inner and ...Erosive burning is a common burning phenomenon of the gunpowder with inner holes.The actual combustion law of the gunpowder with inner holes can be changed by erosive burning.Pressure difference between the inner and the outer of hole caused by loading density variation of the propellant charge makes erosive burning occur at inner holes during in-bore burning.The effect of erosive burning on burning speed of the propellant is studied by using the effects of flow rate,heat transfer and erosion of the combustion gas in inner holes on burning rate.The mathematic model of erosive burning of the propellant is established.The effects of the factors such as loading density,inner hole size and grain length on erosive burning and interior ballistic performance are analyzed.The method to improve the bore pressure for small charge mass and small firing range by erosive burning is proposed.展开更多
为了解谢苗诺夫热爆炸开创性研究论文在科学领域的知识扩散情况,从Web of Science数据库中采集了317篇引用谢苗诺夫(1928)的论文,并分别对该论文的时间和空间扩散、作者层面的扩散、主题层面的扩散及与关联文献的协同扩散进行了分析。...为了解谢苗诺夫热爆炸开创性研究论文在科学领域的知识扩散情况,从Web of Science数据库中采集了317篇引用谢苗诺夫(1928)的论文,并分别对该论文的时间和空间扩散、作者层面的扩散、主题层面的扩散及与关联文献的协同扩散进行了分析。结果表明,在过去90多年中,谢苗诺夫的热爆炸开创性论文受到了持续的引用扩散,并扩散到了美国、以色列、英国、中国及德国等37个国家或地区和以色列内盖夫本-古里安大学、英国利兹大学、中国台湾云林科技大学、俄罗斯科学院及北京理工大学等187个研究机构。该论文的主要引用者包含Gol'dshtein Vladimir、Gray P、Boddington T、Goldfarb I及Zinoviev A等一批热爆炸研究学者。谢苗诺夫(1928)扩散到论文的主题与热爆炸关系密切,包含积分流形、燃烧、差示扫描量热法、失控反应及自热等热爆炸研究主题及研究方法。其中,近期主要扩散到的主题有热失控、锂电池及差示扫描量热法等。谢苗诺夫(1928)与关联文献的协同扩散展示了知识扩散的知识基础及其各个时期的演化情况,揭示了热爆炸从早期理论探索到近期实践研究的历程。展开更多
中国科学技术大学火灾科学国家重点实验室(State Key Laboratory of Fire Science,SKLFS)历经30余年的发展,已成为国际知名的火灾安全科学研究中心。对SKLFS科研成果产出特征的全面分析,有助于为未来SKLFS科研规划或布局研究提供有效的...中国科学技术大学火灾科学国家重点实验室(State Key Laboratory of Fire Science,SKLFS)历经30余年的发展,已成为国际知名的火灾安全科学研究中心。对SKLFS科研成果产出特征的全面分析,有助于为未来SKLFS科研规划或布局研究提供有效的信息参考。从Web of Science核心数据集中采集了SKLFS发表的3949篇论文(1995—2021年),对论文整体产出特征、科研合作状况、研究主题以及高影响力文献进行了分析。在过去30余年,SKLFS的产出增长显著,研究领域聚焦在工程材料领域和火灾燃烧相关领域。在科研合作中,与国际学术共同体建立了广泛的合作关系,并产生了广泛影响。研究主题分布广泛,聚焦于阻燃材料、火灾试验与模拟(池火、隧道火灾等)、火灾动力学、锂电池火灾安全以及人员疏散等领域。其中,阻燃材料包含的主题规模最大,锂电池火灾的研究是实验室新兴的高影响力主题群。在文献层面上,SKLFS发表的高被引论文群亦集中在阻燃材料和锂电池火灾安全的相关研究。SKLFS论文的文献共被引网络形成了该实验室研究的知识基础文献及结构,包括阻燃材料、池火、隧道火灾、人员疏散以及锂电池火灾安全的参考文献群。展开更多
文摘Light screen velocity measuring method with unique advantages has been widely used in the velocity measurement of various moving bodies.For large air resistance and friction force which the big moving bodies are subjected to during the light screen velocity measuring,the principle of velocity correction was proposed and a velocity correction equation was derived.A light screen velocity measuring method was used to measure the velocity of big moving bodies which have complex velocity attenuation,and the better results were gained in practical tests.The measuring uncertainty after the velocity correction was calculated.
文摘Erosive burning is a common burning phenomenon of the gunpowder with inner holes.The actual combustion law of the gunpowder with inner holes can be changed by erosive burning.Pressure difference between the inner and the outer of hole caused by loading density variation of the propellant charge makes erosive burning occur at inner holes during in-bore burning.The effect of erosive burning on burning speed of the propellant is studied by using the effects of flow rate,heat transfer and erosion of the combustion gas in inner holes on burning rate.The mathematic model of erosive burning of the propellant is established.The effects of the factors such as loading density,inner hole size and grain length on erosive burning and interior ballistic performance are analyzed.The method to improve the bore pressure for small charge mass and small firing range by erosive burning is proposed.
文摘中国科学技术大学火灾科学国家重点实验室(State Key Laboratory of Fire Science,SKLFS)历经30余年的发展,已成为国际知名的火灾安全科学研究中心。对SKLFS科研成果产出特征的全面分析,有助于为未来SKLFS科研规划或布局研究提供有效的信息参考。从Web of Science核心数据集中采集了SKLFS发表的3949篇论文(1995—2021年),对论文整体产出特征、科研合作状况、研究主题以及高影响力文献进行了分析。在过去30余年,SKLFS的产出增长显著,研究领域聚焦在工程材料领域和火灾燃烧相关领域。在科研合作中,与国际学术共同体建立了广泛的合作关系,并产生了广泛影响。研究主题分布广泛,聚焦于阻燃材料、火灾试验与模拟(池火、隧道火灾等)、火灾动力学、锂电池火灾安全以及人员疏散等领域。其中,阻燃材料包含的主题规模最大,锂电池火灾的研究是实验室新兴的高影响力主题群。在文献层面上,SKLFS发表的高被引论文群亦集中在阻燃材料和锂电池火灾安全的相关研究。SKLFS论文的文献共被引网络形成了该实验室研究的知识基础文献及结构,包括阻燃材料、池火、隧道火灾、人员疏散以及锂电池火灾安全的参考文献群。
