Materials Research Society symposia proceedings. Materials Research Society最新文献_第7页

Electric conversion of a general aviation aircraft: a case study 通用航空飞机的电力转换:一个案例研究

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-95

S. Bagarello

{"title":"Electric conversion of a general aviation aircraft: a case study","authors":"S. Bagarello","doi":"10.21741/9781644902813-95","DOIUrl":"https://doi.org/10.21741/9781644902813-95","url":null,"abstract":"Abstract. This study analyses the process required to convert a conventional, air-breathing, piston-powered, General Aviation (GA) airplane to fully electric propulsion. The work is configured as a feasibility study for such modifications with the intent of setting a path for similar electric conversion programs on GA airplanes. The motivation behind industries’ interest in alternative propulsion is examined and a full comprehension of the characteristics of the plane in question is achieved through the acquisition of transversal knowledge, examining the aircraft both from the engineering and real-world user points of view. Electric motor, batteries, auxiliary systems and implementation considerations were all made in accordance with regulatory authorities’ requirements, with the purpose of making the project to comply with EASA CS Part 23. The present work analyses the performances expected from the electric plane and compares them with the standard aircraft evaluating the project’s pros and cons. Considerations regarding typical mission profiles show how the electric powerplant will allow the airplane to outperform his conventional counterpart in terms of rate of climb, pollutant emission reduction, noise levels and operating costs. Such gains are however counterbalanced by the detriment of range and endurance performances, which might be deemed acceptable considering the specific plane’s intended use. The study shows how, even though close integration in electric GA aircrafts is desirable since the first stages of conceptual design, piston-to-electric conversions are possible and may indeed contribute to mitigate aviation climate impact.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135370667","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

Conjugate heat transfer applied to transitory analysis for rocket engine cooling systems design 共轭传热在火箭发动机冷却系统设计暂态分析中的应用

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-45

V. Barbato

{"title":"Conjugate heat transfer applied to transitory analysis for rocket engine cooling systems design","authors":"V. Barbato","doi":"10.21741/9781644902813-45","DOIUrl":"https://doi.org/10.21741/9781644902813-45","url":null,"abstract":"Abstract. This study investigates the use of an in-house Conjugate Heat Transfer (CHT) numerical solver for the modelling of transient phenomena in liquid rocket engines active cooling systems. Heat transfer considerations place great limitations in the development of rocket engines and transient operative conditions are amongst the most critical. The current lack of models and numerical tools capable of accounting for the complexities of this time-dependent multi-physics problem, results in oversized cooling systems, long development times and increased risk of failure. The fine modelling of all the involved phenomena and their interaction with each other is crucial to achieve a correct prediction of the thermal fluxes and wall temperatures involved. Hence, CHT simulations are the state-of-the-art for this application. The CHT solver proposed in this work utilizes a partitioned coupling strategy where two extensively validated single-physics solvers exchange information through their interfaces at discrete time steps. A simplified version of the RL-10A-3-3A regenerative cooling jacket is considered as reference to test the strengths and the limits of this approach. Both a complete chilldown of the engine and part of the start-up transient have been simulated. The analyses performed show the ability of the solver proposed to deal with transient phenomena where fluid-structure interaction occurs. In addition, they provide a complete overview of the numerical issues related to the partitioned coupling approach. These preliminary results pave the way for further developments aimed at increasing the reliability of the solutions and extending the application field of the software developed.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135370719","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

Validation of a numerical strategy to simulate the expansion around a plug nozzle 一种模拟塞式喷嘴膨胀的数值策略的验证

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-148

M.D. Gagliardi

引用次数: 0

High-fidelity simulation of the interaction between the wake of a descent capsule and a supersonic parachute 降落舱尾迹与超音速降落伞相互作用的高保真仿真

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-42

L. Placco

{"title":"High-fidelity simulation of the interaction between the wake of a descent capsule and a supersonic parachute","authors":"L. Placco","doi":"10.21741/9781644902813-42","DOIUrl":"https://doi.org/10.21741/9781644902813-42","url":null,"abstract":"Abstract. The objective of the project is to analyze the unsteady dynamics of the parachute-capsule system in a supersonic airflow while descending during planetary entry. Currently, a combination of Large-Eddy Simulation and an Immersed-Boundary Method is being utilized to examine the evolving flow of a rigid supersonic parachute trailing behind a reentry capsule as it descends through the atmosphere of Mars. The flow is simulated at 𝑀𝑎 = 2 and 𝑅𝑒 = 106. A massive GPU parallelization is employed to allow a very high fidelity solution of the multiscale turbulent structures present in the flow that characterize its dynamics. We show how strong unsteady dynamics are induced by the interaction of the wake turbulent structures and the bow shock which forms in front of the supersonic decelerator. This unsteady phenomenon called ‘breathing instability’ is strictly related to the ingestion of turbulence by the parachute’s canopy and is responsible of drag variations and structure oscillations observed during previous missions and experimental campaigns. A tentative one-dimensional model of the flow time-evolving dynamics inside the canopy is proposed.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135370809","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

Comparison of lattice core topologies in sandwich structures 三明治结构中晶格核拓扑的比较

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-64

G. Mantegna

引用次数: 0

Analysis of small spacecraft Mars aerocapture through a single-event drag modulation 通过单事件阻力调制的小型航天器火星大气捕获分析

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-114

T.A. La Marca

引用次数: 0

Development of a modular central electronic unit (CEU) for data handling and management in Martian atmosphere investigations 开发用于火星大气调查数据处理和管理的模块化中央电子单元(CEU)

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-152

L. Marrocchi

{"title":"Development of a modular central electronic unit (CEU) for data handling and management in Martian atmosphere investigations","authors":"L. Marrocchi","doi":"10.21741/9781644902813-152","DOIUrl":"https://doi.org/10.21741/9781644902813-152","url":null,"abstract":"Abstract. This article describes the development of a highly modular Central Electronic Unit (CEU) for data handling and management in Martian atmosphere investigations as part of the DREAMS experiment in ExoMARS 2016 Mission. The CEU was developed by TEMIS and Centro Interdipartimentale di Studi e Attività Spaziali G. Colombo (CISAS) to handle, acquire and transmit medium and low-rate data from sensors dedicated to investigating the Martian atmosphere. The CEU subsystem was designed to communicate with an external host to receive commands and transfer telemetry, transform power from different sources, perform sensors' switch on and off, acquire scientific sensors and their housekeeping monitors, and provide CEU health status. The high modularity of the CEU architecture makes it easy to customize and interface with different types of equipment and instrumentation for various missions. The CEU subsystem is housed on Entry and Descent Module (EDM) and serves as the data handling platform of the DREAMS payload for the EXOMARS 2016 Mission. The CEU has proven to be an effective and flexible solution for data handling and management in Martian atmosphere investigations.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135370941","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

Reduced-order modelling of the deployment of a modified flasher origami for aerospace applications 航空航天应用的改进闪光折纸展开的降阶建模

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-120

A. Troise

引用次数: 1

Integration in controlled airspace: definition and validation of link loss contingency procedures for RPAS in terminal manoeuvring areas 管制空域的整合:终端机动区域RPAS链路丢失应急程序的定义和验证

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-22

G. D’Angelo

{"title":"Integration in controlled airspace: definition and validation of link loss contingency procedures for RPAS in terminal manoeuvring areas","authors":"G. D’Angelo","doi":"10.21741/9781644902813-22","DOIUrl":"https://doi.org/10.21741/9781644902813-22","url":null,"abstract":"Abstract. Remotely Piloted Aircraft Systems (RPAS) are increasingly becoming a part of our day-to-day lives. The vast range of possible applications in both military and civil contexts (e.g. border surveillance, search and rescue, civil protection) is creating a new industry with a large economic potential that, consequently, is pushing the rulemaking and standardization authorities to define and publish the rules, standards and procedures the industry has to comply with in order to integrate its products with the Air Traffic Management System. From an operational perspective, the challenge lies in integrating the worlds of manned and unmanned aircraft in a safe and efficient way allowing both types of aircraft to share the same airspace. An aspect of this challenge consists in defining and validating operational procedures and technical capabilities that allow to manage safely the RPAS even when a (Command and Control and/or ATC radio) link loss occurs. This paper is aimed at describing the procedures for the management of link loss events that affect RPAS flying under Instrument Flight Rules (IFR) in a Terminal Manoeuvring Area (TMA). This paper also describes the distributed facility used to validate such procedures by means of real time simulations in an Italian operational scenario with pilots and Air Traffic Controller (ATCO) in the loop. Positive feedback was provided by both ATCO and Remote Pilots (RPs) on the overall acceptance of the proposed operational procedures which were considered satisfactory even in non-normal conditions (e.g.: degradation of the communication channel quality). The insertion of RPAS in TMA was considered feasible, even in case of single or multiple Command and Control Link Loss (C2LL) contingencies. The experiment described in this paper was part of the SESAR 2020 Programme, PJ13 ERICA project.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135371026","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

Vibro-acoustic analysis of additively manufactured acoustic metamaterial via CUF adaptive finite elements 基于CUF自适应有限元的增材制造声学超材料的振声分析

Materials Research Society symposia proceedings. Materials Research Society Pub Date : 2023-11-01 DOI: 10.21741/9781644902813-160

M. Rossi

{"title":"Vibro-acoustic analysis of additively manufactured acoustic metamaterial via CUF adaptive finite elements","authors":"M. Rossi","doi":"10.21741/9781644902813-160","DOIUrl":"https://doi.org/10.21741/9781644902813-160","url":null,"abstract":"Abstract. In the field of noise and vibrations control inside the cabin, passive noise solutions coupled with the development of new unconventional materials, called Acoustic Metamaterials (AMMs) can be very promising to stop incoming noise and guarantee the passenger’s comfort without an increase in aircraft weight. Within the framework of Carrera’s Unified Formulation (CUF), we study the acoustic properties of double pierced AMM plate printed with Fused deposition modelling technique (FDM). The influence of several geometrical parameters is investigated, such as the size and location of the holes and the perforation ratio. The properties of this AMM are derived from vibro-acoustic analyses of the finite element software, Mul2, developed by Politecnico di Torino, that exploits the CUF. In order to study the AMM complex structure in the CUF framework, the Adaptive finite elements are exploited. This new class of 2D elements, recently developed, allows us to model with shell elements the AMM structure, which presents several discontinuities in the mid-surface due to the presence of corners and internal cavities.","PeriodicalId":87445,"journal":{"name":"Materials Research Society symposia proceedings. Materials Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135370191","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