2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)最新文献_第4页

Analysis of Basic Mechanical Properties for Structural Materials of Light and Small UAV 轻小型无人机结构材料基本力学性能分析

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522564

Zhang Yongjie, Liao Zhiwen, Hu Yingjie, Cao Kang, Wang Yafeng, Guo Yazhou, Wang Jizhen, L. Xiaochuan

引用次数: 0

Research on Fault Diagnosis Method of Rolling Bearing Based on TCN 基于TCN的滚动轴承故障诊断方法研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522447

Hua Zheng, Zhenglong Wu, Shiqiang Duan, Yingxue Chen

{"title":"Research on Fault Diagnosis Method of Rolling Bearing Based on TCN","authors":"Hua Zheng, Zhenglong Wu, Shiqiang Duan, Yingxue Chen","doi":"10.1109/ICMAE52228.2021.9522447","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522447","url":null,"abstract":"The demand for intelligent fault diagnosis algorithms has increased dramatically in the field of aeroengines. Traditional bearing fault diagnosis algorithms mainly extract features manually, and then input them into the classification model for fault identification. As the scale of condition monitoring for mechanical equipment and the sampling frequency gradually increase, how to automatically extract useful features from massive amounts of data and accurately diagnose fault types has become a research hotspots. Due to the powerful feature extraction capabilities of deep learning, this study trained a TCN (temporal convolutional network) model to identify the vibration signals of rolling bearings with 10 different types of faults. The characteristics of different fault signals are extracted through dilated convolution, dropout and residual structure. Finally the generalization ability of the trained model is tested by the cross-validation method. The results show that the model can reach an accuracy of 98.7%, which proves that the method can effectively identify the fault types of rolling bearings.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131785817","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: 3

Numerical Simulation on Flow and Heat Transfer Characteristics of Film/Regenerative Compound Cooling Process 膜式/蓄热式复合冷却过程流动与传热特性的数值模拟

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522496

Jiachen Xu, T. Jing, Yang Li, F. Qin, Shaohua Zhu

引用次数: 0

Auto Relay Handover Method for Extended Star Topology UAV Networks 扩展星型拓扑无人机网络的自动中继切换方法

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522498

Mustafa Ensar Işkın, Seyyid Osman Sevgili, R. Yeniceri

引用次数: 1

Study on Combustion Flow-Field of Solid Ducted Rocket with Multiple Gas Nozzles 多喷嘴固体导管火箭燃烧流场研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522427

Xiang Tang, Xiaotao Tian, Meng Huang, Junyi Chen, Mi Yan, Zhao Wang, Bo Zhang

{"title":"Study on Combustion Flow-Field of Solid Ducted Rocket with Multiple Gas Nozzles","authors":"Xiang Tang, Xiaotao Tian, Meng Huang, Junyi Chen, Mi Yan, Zhao Wang, Bo Zhang","doi":"10.1109/ICMAE52228.2021.9522427","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522427","url":null,"abstract":"In order to gain the combustion flow characteristics in the secondary combustor and direct-connect inlet of the solid ducted rocket with multiple gas nozzles, the flow field parameters distribution and combustion performance of the engine under cold flow and combustion conditions were studied by experimental and numerical simulation methods. The results show that under the cold flow state, the supersonic airflow enters the secondary combustor at the high subsonic state after compressing by the oblique shock, which enhances the mixing effect of the secondary combustor. After the fuel-rich gas enters the secondary combustor through the multi-nozzles, the flow field structure becomes extremely complex, and multiple vortex recirculation zones are formed in the head area of the combustor. The distribution of the fuel-rich gas in the secondary combustor is more uniform, and the residence time of the gas and air increases, which enhances the effect of mixing and combustion organization, and the engine has better combustion performance. With the increase of fuel-rich gas flow, the pressure of the secondary combustor rises, and the oblique shock waves of pre-combustion moves forward continuously. The experimental and simulation results accurately capture the forwarding process and stable position of the oblique shock waves, which provides guidance for the subsequent design optimization of the solid ducted rocket.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130077151","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

Quality Assessment of 3D Printed Products 3D打印产品的质量评估

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522553

E. Soliman, Bander Alzahrani

引用次数: 0

Riblet Surfaces for Performance Increase in Aircraft Turbines 提高飞机涡轮性能的波纹表面

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522394

P. Leitl, Andreas Flanschger, Mikel Lucas, Garcia de Albeniz, Giuseppe Piscitelli, E. Ferrante, E. Costa

{"title":"Riblet Surfaces for Performance Increase in Aircraft Turbines","authors":"P. Leitl, Andreas Flanschger, Mikel Lucas, Garcia de Albeniz, Giuseppe Piscitelli, E. Ferrante, E. Costa","doi":"10.1109/ICMAE52228.2021.9522394","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522394","url":null,"abstract":"The target of increasing environmental sustainability and reliability of the aero engines can be effectively achieved if correct decisions are made just in the preliminary design phase, when materials are identified with the scope to reduce fuel consumption and mechanical wear. The objective of this work is to describe a numerical procedure properly conceived to support the design of riblets. Riblets consist of micro-structures applied over the surfaces of turbomachines’ components in view of increasing the overall efficiency of the engine. Riblets can be generally thought as tiny streamwise grooved surfaces capable to reduce drag in the turbulent boundary layer. The aforementioned numerical methodology, based on the use of computational fluid dynamics (CFD) techniques and tools, makes it possible to determine the optimal size, position and effect of riblets on engine performance. Its use, then, constitutes an effective instrument enabling the quantification of the enhancement in terms of efficiency, CO2 emissions and noise generated, while guaranteeing an economical advantage. Adding customized numerical simulations in the preliminary phase of the turbine design of aero engines thus gives the chance to reduce the turbine’s length keeping the same performance, and to save material weight which has a positive impact on the overall efficiency of aircraft. The results described in this article were obtained in the Framework of ReSISTant, a research project co-financed by the European Commission under the Grant Agreement n. 760941.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114992113","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

Transient Cavitation Characteristics of Compound Centrifugal Impeller 复合离心叶轮的瞬态空化特性

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522457

Feng Jiang, Huacong Li, Xianwei Liu, Jiangfeng Fu

{"title":"Transient Cavitation Characteristics of Compound Centrifugal Impeller","authors":"Feng Jiang, Huacong Li, Xianwei Liu, Jiangfeng Fu","doi":"10.1109/ICMAE52228.2021.9522457","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522457","url":null,"abstract":"In order to reveal the transient characteristics of the compound impeller under cavitation condition, the research method using numerical simulation was adopted. The steady and unsteady numerical calculations of cavitation flow in compound impeller were carried out. Monitoring points are set in the circumferential area of the volute aiming to compare the characteristics of pressure fluctuations in the pump during the state of the non-cavitation and cavitation. The results show that in the circumference of the volute, when cavitation isn't started, the dominant frequency is between the long blade passing frequency and the blade passing frequency and is closer to the long blade passing frequency; in the state of cavitation, the pressure fluctuation amplitude in the volute decreases and the dominant frequency is most influenced by the long blade passing frequency. Analyzing the transient flow field inside the impeller under cavitation and non-cavitation states, it is found that when cavitation is started, axial vortices are generated inside the impeller flow path, and the cavitation area is large, vapor blocks the flow path, causing the head of the pump declines.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128307137","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

Trajectory Planning Method of UAVs Considering the Error Correction 考虑误差校正的无人机轨迹规划方法

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522425

Jianwei Wu, Yang Zhou, Lin Chen, Beibei Sun

引用次数: 0

Study on Performance of Pre-cooling Turbine-Based Combined Cycle Engine 预冷涡轮型联合循环发动机性能研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522495

Lv Ya

引用次数: 2