Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering最新文献_第4页

Non-uniform flow characteristics and rotating instability of a transonic high-pressure compressor rotor with cavity bleed 带空腔放气的跨音速高压压缩机转子的非均匀流动特性和旋转不稳定性

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-02-06 DOI: 10.1177/09544100241232130

Chen Xu, Shaowen Chen, Yun Gong

{"title":"Non-uniform flow characteristics and rotating instability of a transonic high-pressure compressor rotor with cavity bleed","authors":"Chen Xu, Shaowen Chen, Yun Gong","doi":"10.1177/09544100241232130","DOIUrl":"https://doi.org/10.1177/09544100241232130","url":null,"abstract":"The presence of bleed in an aero engine’s compressor can significantly impact its flow characteristics and contribute to rotating instability. This study focuses on the impact of a typical cavity bleed structure on the internal flow characteristics of a compressor, specifically its circumferential non-uniformity and aerodynamic stability. A numerical simulation involving multiple flow passages was conducted on the transonic high-pressure rotor of the E3 compressor, considering its typical bleed structure. The study delves deep into the non-uniform flow characteristics and the mechanisms behind their generation in the compressor flow field. Furthermore, the influence of bleed on the rotating instability of the compressor is explored by comparing changes in compressor instability and adiabatic efficiency under uniform and non-uniform flow field conditions. The findings indicate that the axial position of the cavity bleed structure plays a crucial role in influencing key parameters such as rotor stall margin, peak efficiency, and total pressure ratio under near-stall conditions. The circumferential non-uniformity, resulting from the presence of the cavity bleed, intensifies with higher bleed air flow rates. For the upstream bleed configuration applied to the rotor, with a total bleed rate of 5%, the maximum variation in absolute flow angle at the inlet of different rotor channels can reach up to 1°. Additionally, the maximum difference in inlet flow coefficient can reach 0.0392. These findings demonstrate that the non-uniformity caused by the typical bleed structure leads to a loss in stall margin for the rotor when compared to a uniform flow field scheme.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"77 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861138","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

Adaptive control law based integrated guidance and control design for missile with the radome error compensation 基于自适应控制律的导弹雷达罩误差补偿综合制导与控制设计

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-02-06 DOI: 10.1177/09544100231224071

Jianguo Guo, Yinghe Zhou, Min Zhou

引用次数: 0

A general parametric finite element modeling and stress response analysis methods for pipeline system using the nonconforming solid element 使用不符合实体元素的管道系统通用参数有限元建模和应力响应分析方法

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-02-06 DOI: 10.1177/09544100241232126

Wenhao Ji, Wei-hua Sun, Hong‐lei Ma, Yu Zhang, Xin Wang

{"title":"A general parametric finite element modeling and stress response analysis methods for pipeline system using the nonconforming solid element","authors":"Wenhao Ji, Wei-hua Sun, Hong‐lei Ma, Yu Zhang, Xin Wang","doi":"10.1177/09544100241232126","DOIUrl":"https://doi.org/10.1177/09544100241232126","url":null,"abstract":"In the dynamic topology optimization design of pipeline system, parametric finite element modeling (PFEM) is needed to improve the model reconstruction efficiency. Taking a typical spatial single pipeline as the research object, this paper innovatively presents a PFEM method of pipeline system based on the newly constructed nonconforming solid (Solid-NC) element. The stiffness and mass matrices of the spatial 8-node Solid-NC element with second-order boundary accuracy are obtained by introducing the node-free displacement items and statics condensation method. The PFEM method of the pipeline body is proposed by selecting the straight-line segment lengths as the pipeline shape control parameters. The PFEM method of the pipeline is described in detail, including the node coordinate solutions of straight-line and curved arc segments based on the direction vector method and vector decomposition method, respectively, and the simulation of the clamp mechanical properties considering the actual pre-tightening state of the clamp. Furthermore, the modal analysis is carried out, the node stress response solution is solved based on the stress smoothing method, and the effectiveness of the PFEM method is verified through experiment. Finally, the mesh quality and model reconstruction efficiency of the PFEM method is analyzed, the results show that the developed PFEM method has higher mesh quality and fast model reconstruction speed, and the model reconstruction time is shortened by 544.5 times at most compared with ANSYS software.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"284 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139858550","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

Aerodynamic efficiency analysis of the ridge integrated submerged inlet 山脊一体化沉没式进气口的气动效率分析

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-01-16 DOI: 10.1177/09544100241226991

Eiman B Saheby, Xing Shen, Saeed Jowkar

引用次数: 0

Platform health management for aircraft maintenance – a review 飞机维修平台健康管理--综述

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-01-13 DOI: 10.1177/09544100231219736

Andrews Darfour Kwakye, I. Jennions, Cordelia Mattuvarkuzhali Ezhilarasu

{"title":"Platform health management for aircraft maintenance – a review","authors":"Andrews Darfour Kwakye, I. Jennions, Cordelia Mattuvarkuzhali Ezhilarasu","doi":"10.1177/09544100231219736","DOIUrl":"https://doi.org/10.1177/09544100231219736","url":null,"abstract":"Aircraft health management has been researched at both component and system levels. In instances of certain aircraft faults, like the Boeing 777 fuel icing problem, there is evidence suggesting that a platform approach using an Integrated Vehicle Health Management (IVHM) system could have helped detect faults and their interaction effects earlier, before they became catastrophic. This paper reviews aircraft health management from the aircraft maintenance point of view. It emphasizes the potential of a platform solution to diagnose faults, and their interaction effects, at an early stage. The paper conducts a thorough analysis of existing literature concerning maintenance and its evolution, delves into the application of Artificial Intelligence (AI) techniques in maintenance, explains the rationale behind their employment, and illustrates how AI implementation can enhance fault detection using platform sensor data. Further, it discusses how computational severity and criticality indexes (health indexes) can potentially be complementary to the use of AI for the provision of maintenance information on aircraft components, for assisting operational decisions.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"7 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139531328","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 modeling method of non-axisymmetric endwall based on body-fitted coordinates 基于体拟合坐标的非轴对称端墙建模方法研究

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-01-02 DOI: 10.1177/09544100231225021

Zhiguo Wang, Pei Wang, Jun Liu, Qian Du, Pengfei Wang, Qingzong Xu, Xin Shen, Haohan Wang

{"title":"Research on modeling method of non-axisymmetric endwall based on body-fitted coordinates","authors":"Zhiguo Wang, Pei Wang, Jun Liu, Qian Du, Pengfei Wang, Qingzong Xu, Xin Shen, Haohan Wang","doi":"10.1177/09544100231225021","DOIUrl":"https://doi.org/10.1177/09544100231225021","url":null,"abstract":"Due to the large bending of turbine blades, there is strong three-dimensional flow in cascade channel, the three-dimensional flow at the endwall of blades generates extremely complex heat transfer characteristics. The design concept of high heat load turbine blades, particularly comprehensive optimization of flow and heat transfer at the endwall, has gained increasing attention. In this paper, we have developed a three-dimensional endwall parameterized modeling platform based on Body-Fitting Coordinates and introduced a novel approach for streamwise direction and normal direction concerning endwall profile construction. The endwall modeling was optimized using Genetic Algorithm to obtain a modified one with low heat transfer level on the premise that the aerodynamic loss is not increased. The analysis indicates that the reduction of aerodynamic loss with the modified endwall is relatively marginal, whereas the heat transfer intensity on the endwall surface experiences a significant decrease. Additionally, employing an endwall model can effectively mitigate the lateral pressure gradient in the cascade channel, which exerts a pronounced influence on suppressing secondary vortex development in the cascade.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"18 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452681","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

Motion mode distribution of spiral maneuvering target during reentry phase 重返大气层阶段螺旋机动目标的运动模式分布

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2023-12-26 DOI: 10.1177/09544100231223532

Shengwen Xiang, Pei Wang, Ye Yang, Kai Da, Hongqi Fan

引用次数: 0

Evaluating one engine inoperative conditions in subscale electric vertical take-off and landing aircraft: An in-depth tethered hover test analysis 评估亚尺度电动垂直起降飞机的单引擎失效情况：深入的系留悬停测试分析

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2023-12-26 DOI: 10.1177/09544100231220471

Youngshin Kang, Am Cho, Seongwook Choi, Yushin Kim, Jongmin Bae, Junho Cho, Donghyeon Ko, Haneul Yun

{"title":"Evaluating one engine inoperative conditions in subscale electric vertical take-off and landing aircraft: An in-depth tethered hover test analysis","authors":"Youngshin Kang, Am Cho, Seongwook Choi, Yushin Kim, Jongmin Bae, Junho Cho, Donghyeon Ko, Haneul Yun","doi":"10.1177/09544100231220471","DOIUrl":"https://doi.org/10.1177/09544100231220471","url":null,"abstract":"The direction of propeller rotation in a distributed electric-powered vertical take-off and landing (eVTOL) aircraft significantly influences control forces and induced drag during both helicopter and fixed-wing modes. This study proposes a strategy to determine the most effective rotational direction for each propeller. This approach effectively mitigates one-engine-inoperative (OEI) conditions during helicopter mode for a subscale eVTOL referred to as the optionally piloted personal air vehicle (OPPAV). Moreover, the study developed an optimal control law using the linear programming method, which minimizes the maximum power required for individual motors under OEI conditions. The lowest maximum power was achieved under OEI conditions when both the front and rear propellers in each pod rotated in the same direction. Furthermore, to validate this proposed control law, a tethered hover test was performed using the subscale OPPAV under OEI conditions. Our findings demonstrate that determining the rotational direction of propellers using the newly proposed reconfiguration control method significantly enhances the safety of eVTOL aircraft operating under OEI conditions.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"11 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156313","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-shaping guidance based on optimality formulation for cooperative attack of multiple interceptors 基于多拦截器协同攻击优化公式的轨迹整形制导

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2023-12-19 DOI: 10.1177/09544100231222035

Hyeong-Geun Kim, Jongho Shin

{"title":"Trajectory-shaping guidance based on optimality formulation for cooperative attack of multiple interceptors","authors":"Hyeong-Geun Kim, Jongho Shin","doi":"10.1177/09544100231222035","DOIUrl":"https://doi.org/10.1177/09544100231222035","url":null,"abstract":"In this study, we present an optimal guidance structure that achieves impact angle and time constraints for the salvo attack of multiple missiles. As the first step in deriving a guidance law, we define a desired profile of the look angle that satisfies the impact angle and time constraints using a polynomial function of the relative range. The guidance command is configured based on the optimality formulation that achieves the desired profile of the look angle while minimizing the usage of the normal acceleration. The resulting trajectory under the proposed law is expressed as a polynomial form whose exponents can be selected to satisfy the desired constraints with the impact courses of various curvatures. In addition, the proposed law can achieve a wide range of terminal constraints since the time-to-go, which is difficult to estimate for a trajectory with a small radius of curvature, is not required for implementation. The numerical simulation results show that the proposed law achieves precise interception under various terminal conditions, validating the proposed law.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"41 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139171651","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

Feasibility analysis and saturation control for underactuated spacecraft formation reconfiguration in elliptic orbits 椭圆轨道上动力不足航天器编队重组的可行性分析和饱和控制

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2023-12-15 DOI: 10.1177/09544100231219922

Jiang Shao, Qingrui Zhou, Yan Xiao, Franco Bernelli-Zazzera, Zhaowei Sun

引用次数: 0