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- A method for an efficiency and weight-optimised preliminary design of a hydrogen-powered fuel cell-based hybrid-electric propulsion system for aviation purposes
- 作者： Akkaya Mücahit Neumann Nicolai Peitsch Dieter 来源： CEAS Aeronautical Journal 年份： 2023 文献类型 ： 期刊 关键词： hybrid performance Optimisation Fuel electric aircraft design PEM preliminary cell
- 描述： Due to their high thermodynamic efficiency and the fact that they produce no CO2\documentclass[1
- A method for an efficiency and weight-optimised preliminary design of a hydrogen-powered fuel cell-based hybrid-electric propulsion system for aviation purposes
- 作者： Akkaya Mücahit Neumann Nicolai Peitsch Dieter 来源： CEAS Aeronautical Journal 年份： 2023 文献类型 ： 期刊 关键词： hybrid performance Optimisation Fuel electric aircraft design PEM preliminary cell
- 描述： Due to their high thermodynamic efficiency and the fact that they produce no CO2\documentclass[1
- 罗罗与GE民用涡扇航空发动机技术研究（英文）
- 作者： 孙震宇 金宗亮 来源： 内燃机与配件 年份： 2019 文献类型 ： 期刊 关键词： generation innovation burn configuration & two emission performance material Fuel noise difference jump
- 描述： CF6-80C2和罗罗RB211系列RB211-524的早期发动机技术差异。由于空中交通的不断增长以及由此带来对环境的挑战,发动机总体性能、燃油燃烧、噪音和污染排放等方面的技术革命在两个主承制商的发展历程中都
- 罗罗与GE民用涡扇航空发动机技术研究（英文）
- 作者： 孙震宇 金宗亮 来源： 内燃机与配件 年份： 2019 文献类型 ： 期刊 关键词： generation innovation burn configuration & two emission performance material Fuel noise difference jump
- 描述： CF6-80C2和罗罗RB211系列RB211-524的早期发动机技术差异。由于空中交通的不断增长以及由此带来对环境的挑战,发动机总体性能、燃油燃烧、噪音和污染排放等方面的技术革命在两个主承制商的发展历程中都
- Enhancement of Mechanical Properties in Glass-Fiber Woven Reinforced Hybrid Composites for Aerospace Applications: An Empirical Investigation
- 作者： Abeer Farouk Al Attar Hussein Alaa Jaber Ammar Mousa Hasan 来源： Revue des Composites et des Matériaux Avancés-Journal of Composite and Advanced Materials 年份： 2023 文献类型 ： 期刊 关键词： glass fiber E woven mechanical Al2O3 red (ANOVA) hybrid variance Analysis composite of kaolin properties
- 描述： This experimental study aims to create innovative hybrid composites (HCs) for aerospace applications using the hand lay-up technique. Different volume fractions (Vf%) of distinctive natural (white clay (W) and red clay (R)) and synthetic (alumina (A) and woven glass fibers (E-GFW) reinforcing unsaturated polyester (UP). The mechanical and physical characterizations of these innovative HCs were estimated according to the American Society for Testing and Materials (ASTM) standards. The findings show that adding more white clay, red clay, and alumina to the HCs makes a big difference in improving their mechanical properties, such as Hardness Shore D (HSD), True Tensile Strength (Ttσ), Impact Strength (iσ), and Fracture Toughness (Kc). Analysis of variance (ANOVA) revealed noteworthy variations in the assessed parameters, emphasizing the potential suitability of these materials for aeronautical applications. This research contributes to the ongoing progress in material engineering, specifically in enhancing the mechanical resilience of composites utilized in the aerospace industry.
- Enhancement of Mechanical Properties in Glass-Fiber Woven Reinforced Hybrid Composites for Aerospace Applications: An Empirical Investigation
- 作者： Abeer Farouk Al Attar Hussein Alaa Jaber Ammar Mousa Hasan 来源： Revue des Composites et des Matériaux Avancés-Journal of Composite and Advanced Materials 年份： 2023 文献类型 ： 期刊 关键词： glass fiber E woven mechanical Al2O3 red (ANOVA) hybrid variance Analysis composite of kaolin properties
- 描述： This experimental study aims to create innovative hybrid composites (HCs) for aerospace applications using the hand lay-up technique. Different volume fractions (Vf%) of distinctive natural (white clay (W) and red clay (R)) and synthetic (alumina (A) and woven glass fibers (E-GFW) reinforcing unsaturated polyester (UP). The mechanical and physical characterizations of these innovative HCs were estimated according to the American Society for Testing and Materials (ASTM) standards. The findings show that adding more white clay, red clay, and alumina to the HCs makes a big difference in improving their mechanical properties, such as Hardness Shore D (HSD), True Tensile Strength (Ttσ), Impact Strength (iσ), and Fracture Toughness (Kc). Analysis of variance (ANOVA) revealed noteworthy variations in the assessed parameters, emphasizing the potential suitability of these materials for aeronautical applications. This research contributes to the ongoing progress in material engineering, specifically in enhancing the mechanical resilience of composites utilized in the aerospace industry.
- 浅谈VoIP技术在空管语音交换系统的应用及发展
- 作者： 郭娜 来源： 厦门科技 年份： 2017 文献类型 ： 期刊 关键词： 多媒体通信 Aviation VoIP技术 服务模型 实时传输 交换系统 网络层 路由选择 Voice 互联网协议
- 描述： 引言民航语音通信系统发展经历了三个阶段,模拟语音通信、PCM(Pulse Code Modulation)语音通信和Vo IP语音。Vo IP(Voice over Internet Protocol)基于互联网协议的语音通信技术从上世纪90年代中期出现之后得到了蓬勃的发展和广泛的应用。随着网络时代的来临,Vo IP以不可比拟的成本优势和便利性迅速在语音通信市场蹿红。EU-
- 空中互联时代已经来临
- 作者： 李璇 蓝楠 来源： 航空维修与工程 年份： 2017 文献类型 ： 期刊 关键词： 国际航线 下行速率 汉莎航空 Aviation 卫星网络 卫星通讯技术 即时通讯 卫星通信技术 互联时代 盈利能力
- 描述： 空中互联时代已经来临