2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)最新文献_第7页

Parameters Analysis of Non-linear Combustion Instability Based on the Pulsed Trigger T-burner Technique 基于脉冲触发t型燃烧器技术的非线性燃烧不稳定性参数分析

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467606

Wei Shao-juan, Jin Bing-ning, L. Pei-jin

{"title":"Parameters Analysis of Non-linear Combustion Instability Based on the Pulsed Trigger T-burner Technique","authors":"Wei Shao-juan, Jin Bing-ning, L. Pei-jin","doi":"10.1109/ICMAE.2018.8467606","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467606","url":null,"abstract":"High-amplitude pressure oscillation in solid propellant rocket motors shows nonlinear effects including the mean chamber pressure shift, limiting amplitudes of the acoustic oscillation, and energy transfer among acoustic modes. Along with the obvious undesirable vibrations, these features lead to the most damaging impact of combustion instability on system reliability and structural integrity. However, the physical mechanisms behind these phenomena and their effect on the propellant combustion and the acoustic oscillation behavior have never been successfully established. Therefore, fully understanding of the nonlinear combustion instability is crucial in the design process. In this paper, the nonlinear combustion instability parameters are obtained based on the pulse trigger T-burner technique and the relationship between the propellant combustion and the nonlinear acoustic oscillation is analyzed. Some different formulas of the composite propellants are adopted during the 30 pulsed T-burner firings. The operating pressures of tests are set at 7MPa and 10.5MPa, and the acoustic 1st mode frequencies are set at about 170Hz and 255Hz. The results show that: the propellant combustion has significant influences on the mean pressure shift (DC Shift) and the initial limit amplitude. Under the same trigger pressure, the mean pressure shift and the initial limit amplitude are significantly higher than those without propellant combustions. The DC Shift increases about 13.7~39.3%, and the initial limit amplitude increases about 23.6~47.4% under the same trigger pressure. The propellants with different formulas lead to different combustion response characteristics, and subsequently the initial limit oscillation. The higher Rp of the propellant is, the higher oscillation amplitude will be in the T-burner. Furthermore, the mean pressure shift is proportional to the combustion response value of the propellant and the square of the acoustic pressure oscillation amplitude.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127400565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical Solution of the Flow Field Around a Prolate Spheroid 长形球体周围流场的数值解

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467677

Emre Yüca, M. Kavsaoglu

引用次数: 0

New Approach to Predict Mechanical and Tribological Behaviour Through Rheological Properties of Polypropylene Composites 利用聚丙烯复合材料的流变特性预测其力学和摩擦学性能的新方法

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467664

N. Hadi, A. Al-kawaz, A. Hamza, Dhey Jawad Mohamed

{"title":"New Approach to Predict Mechanical and Tribological Behaviour Through Rheological Properties of Polypropylene Composites","authors":"N. Hadi, A. Al-kawaz, A. Hamza, Dhey Jawad Mohamed","doi":"10.1109/ICMAE.2018.8467664","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467664","url":null,"abstract":"Polypropylene is an adaptable polymer since its properties can be changed to meet particular issues. The effect of mineral fillers (CaCO3 and wollastonite) with a distinction in the size on the rheological, mechanical and tribological properties of polypropylene (PP) have been examined. Variety concentrations of CaCO3 and wollastonite are blended with polypropylene utilizing the velocity of the twin-screw extruder was 25 rpm and 190°C. Shear viscosity, shear stress and shear thinning effect where tested using SR20 Single pore Capillary rheometer. Tensile strength, elastic modulus, impact resistance, hardness, and coefficient of friction were exanimated. Likewise, surface topography wear track and surface morphology were exanimated utilizing AFM and light microscopy. The rheological result shows that both composites melt exhibited the shear-thinning effect. The PP/CaCO3 melt possess higher shear thinning effect than PP/Wollastonite melt. The reduction in viscosity and critical shear stress were observed for high wollastonite content. The outcomes demonstrated a huge upgrade in the mechanical and tribological performance for the resultant composites with increasing the concentration of both fillers especially the PP/wollastonite composites. Additionally, the results of AFM and light microscopy demonstrated that the roughness of the surface diminished with the decreasing of shear viscosity of the composites. In general, a great correlation between shear viscosities conducts with mechanical properties and surface quality for both PP composites.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122878441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

ICMAE 2018 Title Page ICMAE 2018标题页

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/icmae.2018.8467626

引用次数: 0

Prediction of the Resonant Fatigue Residual Life of Stiffened Panel by Measuring Frequency 用频率测量法预测加筋板的共振疲劳剩余寿命

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467633

X. Feng, W. Ke, Jiang Jinhui

引用次数: 0

Process Development for the In-house Manufacture of Aircraft Cabin and Cargo Composite Panels 飞机客舱和货舱复合板的内部制造工艺开发

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467636

M. Saliba, Ian Attard

引用次数: 0

Design of Intake Manifold and Selection of Suitable Material for Intake Manifold Gasket for Student Formula 学生方程式进气歧管的设计及垫片材料的选择

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467691

N. Kammuang-lue, Jirawat Boonjun

{"title":"Design of Intake Manifold and Selection of Suitable Material for Intake Manifold Gasket for Student Formula","authors":"N. Kammuang-lue, Jirawat Boonjun","doi":"10.1109/ICMAE.2018.8467691","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467691","url":null,"abstract":"The objectives of this study are to design, produce, and test an intake manifold for Student Formula in order to establish a high torque band to cover a mid-range engine speed; in addition, the aim is to experimentally investigate for a suitable material for intake manifold gaskets in order to reduce the heat transfer from the engine which accumulates in the intake manifold’s body. All parts were installed on the Student Formula CMU F-611, which was produced by following the Formula SAE rules. It could be understood from the design that both the inlet angle and the outlet angle of a restrictor are 14°. The capacity of an air surge tank is 1,237 cm3. A bell-mouth has an inlet internal diameter of 58 mm and a length of 30 mm. The inside diameter and the length of each of the intake runners equals to 36 mm and 345 mm, respectively. A test on the chassis dynamometer showed that the maximum torque was 50.8 N.m at an engine speed of 7,000 rpm — findings which met the initial requirement of the design. In addition, the non-asbestos gasket was found to be the most suitable gasket for reducing the cumulative heat in the intake manifold, while the paper gasket was the most suitable gasket from the point of economy.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132145661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and Evaluation of Civil Aircraft Auto-Landing with Various Guidance Systems 民用飞机不同制导系统自动着陆仿真与评价

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467604

Chengxi Li, Guanxin Hong

引用次数: 0

An Adaptive Control Approach for a Flexible Hypersonic Glide Vehicle 柔性高超声速滑翔飞行器的自适应控制方法

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467711

Erkang Chen, W. Jing, C. Gao, Zhao Zhang

引用次数: 3

Experimental Investigation of the Impact Resistance of Involute Spur Gears 渐开线直齿齿轮抗冲击性能试验研究

2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467616

Oğuz Doğan, F. Karpat, Celalettin Yücem, O. Kalay

{"title":"Experimental Investigation of the Impact Resistance of Involute Spur Gears","authors":"Oğuz Doğan, F. Karpat, Celalettin Yücem, O. Kalay","doi":"10.1109/ICMAE.2018.8467616","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467616","url":null,"abstract":"Gears are the most commonly used power transmission element in today's world. Due to their advantages, gears are widely used in many sectors such as aerospace, space, wind turbines, automotive, etc. In these sectors the moment, speed and power values that need to be transmitted are increasing day by day. Due to the increased power and moment values, gears are exposed to high dynamic, impact loads and they are subject to damage due to these loads. For this reason, the impact resistance of the gears must be determined carefully in the design phase of the gear. In this study, an experimental method for determining impact loads of the gears is developed. A special drop gear impact test setup is designed and manufactured to determine the impact loads on the gear. The test setup works by dropping the load on the gear tooth from a certain height. In this way, the teeth are broken and the impact load, acceleration and displacement values are measured by using special measurement instruments which are attached on the test setup. The effect of surface hardness on impact loads is investigated. Two different gear samples are used in the experiments. It is seen that the surface hardness has great effect on the impact loads of the gears. It has been found that surface hardened gears have much higher impact strength than unhardened gears.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122838306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0