发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
The Flow Simulation of A Fuel Centrifugal Pump with Integrated Inducer and Impeller Influenced by Inlet Flow Ejector 进口气流喷射器影响下诱导叶轮一体化燃料离心泵的流动模拟
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467687
L. Jia, Cheng Xiao-long
{"title":"The Flow Simulation of A Fuel Centrifugal Pump with Integrated Inducer and Impeller Influenced by Inlet Flow Ejector","authors":"L. Jia, Cheng Xiao-long","doi":"10.1109/ICMAE.2018.8467687","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467687","url":null,"abstract":"As the research object to a aero fuel centrifugal pump with inlet flow ejector, this paper research the numerical simulation of the centrifugal pump. The simulation’s accuracy by Pumplinx was validated by comparing the simulation datas with test datas. Studies have shown that this centrifugal pump’s head, efficiency and cavitation characteristics curve of numerical simulation meet the test data. Then the inner flow characteristics of the model is calculated by analysing the pressure of middle axial and middle radial area. Pressure of inner flow is steady, and could make high pressure at high efficiency at the small flow states; Meanwhile, the ejector can influenced the inner flow performance.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"42 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":"127423141","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: 2
Hydrodynamic Lubrication Performance Analysis of the Self-Cooled Bearing Structure in Aero-Gear Pump Considering the Cavitation Effect 考虑空化效应的航空齿轮泵自冷轴承结构流体动力润滑性能分析
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467709
Jiaxing Zhu, Huacong Li, Jiangfeng Fu, Xianwei Liu
{"title":"Hydrodynamic Lubrication Performance Analysis of the Self-Cooled Bearing Structure in Aero-Gear Pump Considering the Cavitation Effect","authors":"Jiaxing Zhu, Huacong Li, Jiangfeng Fu, Xianwei Liu","doi":"10.1109/ICMAE.2018.8467709","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467709","url":null,"abstract":"In this paper, a load coupling numerical method is developed to analyze the performance of the journal bearing considering the internal flow simulation inside aero-engine gear pump. First, three-dimensional flow analysis is conducted. Then based on the JFO theory, an improved hybrid scheme including switch function is used to solve Reynolds equation while the external load given by the simulation result of the gear pump. The robust, convergence and validation of algorithm is tested compared with the experiment result where the pressure maximum error less than 2%. Finally, parametric study on different groove structure and working conditions of an aero-gear pump bearing has been presented to assess the performance features of the bearing hydrodynamic lubrication problem. The result shows that the effect of external load on bearing was dependent on eccentricity. In addition, the pressure distribution in bearing was markedly affected by the oil groove structure where relative pressure difference at 5% and inlet pressure is proportional to maximum pressure.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"20 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":"127224117","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
Small Postponed Mechanism for Delay-Unfolding Based on Pressure Device 基于压力装置的延迟展开小延迟机构
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467652
Yang Jinpeng, C. Xiaoguang, Xu Hanzhong, Zou Xiaofeng, Jiao Shenghai, Sheng Xi
{"title":"Small Postponed Mechanism for Delay-Unfolding Based on Pressure Device","authors":"Yang Jinpeng, C. Xiaoguang, Xu Hanzhong, Zou Xiaofeng, Jiao Shenghai, Sheng Xi","doi":"10.1109/ICMAE.2018.8467652","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467652","url":null,"abstract":"A new small postponed mechanism for delay- unfolding based on pressure device is proposed, which is composed of several pistons, chambers, springs, steel balls, valve and other structural parts. The principle and working process of the postponed mechanism are expounded, and a mathematical model is proposed to characterize the performance of the mechanism. The delay time of the mechanism for unfolding is greatly affected by the radius of the vent, initial volume of chamber and initial gas pressure. The unfolding time can be delayed by 0~20 s with this kind of mechanism. The mechanism has advantages of simplicity, high reliability and recycling compared with those mechanism based on electrical system or pyrotechnic device, thus it has a good application prospect in small aircraft.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"1 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":"130638537","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
Study on the Cooling Characteristics of the Liquid Oxygen Kerosene Engine Exhaust Plume Impact by the Water Injection 液氧煤油发动机喷水冲击排气羽流冷却特性研究
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/icmae.2018.8467622
Hong-hua Cai, Xing Sun, W. Nie, Xiaojie Dou, Tianbo Gao
{"title":"Study on the Cooling Characteristics of the Liquid Oxygen Kerosene Engine Exhaust Plume Impact by the Water Injection","authors":"Hong-hua Cai, Xing Sun, W. Nie, Xiaojie Dou, Tianbo Gao","doi":"10.1109/icmae.2018.8467622","DOIUrl":"https://doi.org/10.1109/icmae.2018.8467622","url":null,"abstract":"To study the effect of injecting cooling water on the cooling characteristics of the of liquid-oxygen kerosene engine exhaust plume impact, the three-dimensional numerical simulation of the liquid oxygen/kerosene engine plume impact flow field on the groove with the conical diversion device has been carried out by using the Computational Fluid Dynamics software, and impact flow fields under different water injection conditions have been calculated and compared. It is found that, the farther the axial distance of the nozzle position, the less cooling effect of the cooling water to the exhaust plume and the diversion device. When the cooling water is injected to the exhaust plume at a velocity opposite to the gas flow direction of the exhaust plume, the vaporization efficiency of the cooling water can reach the maximum by fully mixing. When the cooling water is injected to the exhaust plume at a velocity perpendicular to the exhaust plume, the cooling water can produce a larger low temperature area to achieve the best cooling effect.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"1 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":"130657554","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
Research on Time-Varying Meshing Stiffness of Helical Gear Considering Tribo-dynamic Behavior 考虑摩擦动力学行为的斜齿轮时变啮合刚度研究
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467672
Dong Huili, Niu Tao
{"title":"Research on Time-Varying Meshing Stiffness of Helical Gear Considering Tribo-dynamic Behavior","authors":"Dong Huili, Niu Tao","doi":"10.1109/ICMAE.2018.8467672","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467672","url":null,"abstract":"An analytical expression of oil film stiffness is proposed for helical gear based on two-dimensional EHL analysis considering the dynamic force, rotational speed, tooth blank temperature and oil viscosity. Then the tribo-dynamic equation is built to obtain the time-varying meshing stiffness of helical gear. The results show that the analytical model keeps correspondence with the numerical results well as the load and velocity change in a wide range. The load distribution is determined by the oil film stiffness to a great extent. As the velocity arising, the oil film stiffness and the dynamic load change similarly. The equivalent meshing stiffness of gear changes periodically. At low speed, the meshing stiffness is high, so vibration displacement appears tiny. However, as the rotational speed reaches in the resonance region, the meshing stiffness greatly reduces with growing vibration displacement.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"63 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":"130278633","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
Minimum-Fuel Powered Descent Guidance for Mars Landing 火星着陆的最小燃料动力下降制导
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467625
Bai Chengchao, Guo Jifeng, Zheng Hongxing
{"title":"Minimum-Fuel Powered Descent Guidance for Mars Landing","authors":"Bai Chengchao, Guo Jifeng, Zheng Hongxing","doi":"10.1109/ICMAE.2018.8467625","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467625","url":null,"abstract":"Motivated by the requirement for pinpoint landing in the future Mars missions, this paper presents a convex programming algorithm for the numerical solution of the minimum fuel powered descent guidance problem. For the engine’s variable thrust, based on factors like amplitude of the thruster, the Martian surface constraint, descent inclination, this paper describes the problem of fuel-optimal precise soft landing at the power descent phase and gives the corresponding equivalent optimization problem; then the equivalent optimization problem is discretized and converted to the optimization problem with consideration of linear constraints and second order cone constraints. Finally, through the simulation analysis of typical-fuel optimal landing trajectory, it can be concluded: the resulting guidance algorithm can potentially be implemented onboard a spacecraft for real-time application.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"167 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":"123170046","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
Removal of Organic Contaminants by Argon Plasma Jet: A Prospective Treatment of Urine on Spacecraft 氩等离子体射流去除航天器上尿液中的有机污染物
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467608
Peerapong Pornwongthong
{"title":"Removal of Organic Contaminants by Argon Plasma Jet: A Prospective Treatment of Urine on Spacecraft","authors":"Peerapong Pornwongthong","doi":"10.1109/ICMAE.2018.8467608","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467608","url":null,"abstract":"Water is essential for astronauts on spacecraft. In past decades, membrane technology has been used to recycling urine as an important water resource for astronauts. However, the filtrate from membrane filtration is usually contaminated by various groups of organic compounds. In this study, argon plasma jet system was applied to treat acetone and phenol, organic contaminants usually detected in urine. While argon plasma jet system operated at 15 Watt could remove >97.4% of 99.6 mg/L acetone within 240 seconds, it could remove 92.1% of 100.2 mg/L phenol within 210 seconds. Integrated air stripping and advanced oxidation was likely the mechanism for the removal of these chemicals. These results suggested that argon plasma jet system was effective to remove acetone and phenol in contaminated water, and may be applicable for the treatment of organic chemicals in urine on spacecraft.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"15 3 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":"122450712","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
A Preprocessing Method for Flutter Signals Based on Morphological Filtering 基于形态学滤波的颤振信号预处理方法
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467641
Z. Hua, Li Junhao, Duan Shiqiang
{"title":"A Preprocessing Method for Flutter Signals Based on Morphological Filtering","authors":"Z. Hua, Li Junhao, Duan Shiqiang","doi":"10.1109/ICMAE.2018.8467641","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467641","url":null,"abstract":"The analysis on the test data is an important way to obtain the flutter characteristics of aircraft. Because of the low quality of the measured signal, the preprocessing is indispensable to improve the accuracy of flutter data analysis. In this paper, the morphological filtering is introduced into the field of flutter structure data processing. The theory of mathematical morphology is given, and the effectiveness of morphological filtering depending on the different operation types and structural elements are discussed. After that, the typical flutter boundary prediction (FBP) method is used to verify the validity and feasibility of the morphological preprocessing method through the numerical simulations, as well as the flight flutter test data. The results is shown that the morphological filtering can enhance Signal to Noise Rate (SNR) of the measured structural response from the physical test in terms of improving the prediction accuracy in actually engineering applications.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"90 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":"125915619","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
Study on the Wire Electrical Discharge Machining of AA 7075 Aluminum Alloy AA 7075铝合金线材电火花加工研究
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467605
Ş. Karabulut, Recep Kökçan, Musa Bilgin, A. Özdemir
{"title":"Study on the Wire Electrical Discharge Machining of AA 7075 Aluminum Alloy","authors":"Ş. Karabulut, Recep Kökçan, Musa Bilgin, A. Özdemir","doi":"10.1109/ICMAE.2018.8467605","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467605","url":null,"abstract":"In the present study, wire electrical discharge machining (wire EDM) behaviors of Aluminum alloy 7075-T6 were investigated and the influence of the wire tension, voltage and peak current on the surface quality were evaluated. Experiments were performed based on the Taguchi L27 full factorial experiment design and optimal cutting parameters for surface quality were determined. The mean effect plot and analysis of variance (ANOVA) were used to evaluate the cutting parameters on the machined surface. Experiment results showed that the most efficient parameter on surface roughness was the peak current value. It was observed that aluminum was affected by the electric arc during the wire EDM process and caused the crater formation on the machined surface of the aluminum alloy. The vertical crack connected with non-continuous horizontal crack parallel to the machined surface of the workpiece were seen on the machined surface.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"23 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":"126872693","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: 4
Design of a Vibration Isolator for the Inertial Navigation System of an Autopilot Dedicated to the Operation of Light Drones 轻型无人机自动驾驶惯导系统隔振器设计
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467662
Mourad Kedadouche, Sun Yulan, Zhaoheng Liu, M. Thomas, Guillaume Charland-Arcand, A. Beck
{"title":"Design of a Vibration Isolator for the Inertial Navigation System of an Autopilot Dedicated to the Operation of Light Drones","authors":"Mourad Kedadouche, Sun Yulan, Zhaoheng Liu, M. Thomas, Guillaume Charland-Arcand, A. Beck","doi":"10.1109/ICMAE.2018.8467662","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467662","url":null,"abstract":"One of the key components in drone autopilots is the air navigation system that uses the raw output of the MEMS (Micro Electro Mechanical Systems) sensor to estimate drone states (angular position, angular velocity, linear position and linear velocity) in real time. However, the vibrations of the drone have an important impact on the measurement from the sensors. In this study, a new isolation system for the autopilot electronic card is presented. An experimental study is conducted to understand the environment on which the autopilot is exposed. According to the source of vibration, the target performances of the isolator are identified and the design of the geometry that meets this requirement is proposed. By using the finite element analysis, modal and harmonics analysis have been conducted to analyze the effectiveness of the model. A design has been proposed to isolate the vibration source by 80%.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"23 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":"121094646","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书