Journal of Spacecraft and Rockets最新文献_第4页

Aerodynamic Effects of Surface Protuberance Size on Slender-Bodied Supersonic Vehicle 超声速细长体飞行器表面凸起尺寸对气动性能的影响

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-18 DOI: 10.2514/1.a35714

Kazuki Nimura, Fumiya Tsutsui, Keiichi Kitamura, Satoshi Nonaka

{"title":"Aerodynamic Effects of Surface Protuberance Size on Slender-Bodied Supersonic Vehicle","authors":"Kazuki Nimura, Fumiya Tsutsui, Keiichi Kitamura, Satoshi Nonaka","doi":"10.2514/1.a35714","DOIUrl":"https://doi.org/10.2514/1.a35714","url":null,"abstract":"The presence of protuberances can create an asymmetric flowfield, which contributes to side forces in slender-bodied launch vehicles. In this study, we conduct numerical calculations using a supercomputer at Japan Aerospace Exploration Agency (JAXA) on a slender body with a different-sized protuberance at Mach 1.5 to systematically determine the aerodynamic effects of the protuberance size. The protuberance size is varied in its height and width. According to the results, it is demonstrated that the side force significantly increases when the height of the protuberance increases. This is because, the higher the protuberance, the farther the wake vortex produced by the protuberance moved away from the body. Consequently, the flow asymmetry between the protuberance side and clean side is augmented, and the side force increases. In contrast, the side force is almost constant when only the width of the protuberance is changed. The results of this study indicate that when attaching the protuberance to the vehicles the height of the protuberance should be lowered, and the width of the protuberance should be increased to secure the volume of the protuberance and reduce the increase in side force.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135887999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scheduling an Agile Multipayload Earth-Observing Satellite 敏捷多载荷地球观测卫星调度

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-18 DOI: 10.2514/1.a35726

Wenyuan Zhang, Gangtie Zheng

{"title":"Scheduling an Agile Multipayload Earth-Observing Satellite","authors":"Wenyuan Zhang, Gangtie Zheng","doi":"10.2514/1.a35726","DOIUrl":"https://doi.org/10.2514/1.a35726","url":null,"abstract":"A highly integrated Earth-observing satellite can possess several maneuverable payloads to perform different missions simultaneously, which brings some challenges to the method of task scheduling. This paper addresses the selection and scheduling problem of an agile satellite with several independently maneuverable optical payloads. Some differences compared to the traditional scheduling problem of agile satellites are presented and considered in a constrained optimization model. A two-stage method is proposed to accomplish the scheduling of the satellite and payloads in different stages. Clusters are generated from preprocessed tasks by a clique partition algorithm, and their centers are used to calculate the pointing direction of the satellite in the first stage. A multiobjective local search algorithm is introduced to schedule tasks in each selected cluster in the second stage. Considering the time-dependent property of the transition time, the problem of determining the start observation time is transformed into linear programming in a proposed insertion operator that guarantees the feasibility of generated solutions. Two types of instances are created and tested to demonstrate the effectiveness of the proposed method, and some analyses are conducted based on the experimental results.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"129 36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135888067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High Vacuum Capable Fused Filament Fabrication 3D Printer, Part I: Low-Temperature Polymers and Early Lessons Learned 高真空能够熔丝制造3D打印机，第一部分:低温聚合物和早期的经验教训

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-18 DOI: 10.2514/1.a35708

Randy Spicer, Fatima Miranda, Tom Cote, Tom Itchkawich, Jonathan Black

{"title":"High Vacuum Capable Fused Filament Fabrication 3D Printer, Part I: Low-Temperature Polymers and Early Lessons Learned","authors":"Randy Spicer, Fatima Miranda, Tom Cote, Tom Itchkawich, Jonathan Black","doi":"10.2514/1.a35708","DOIUrl":"https://doi.org/10.2514/1.a35708","url":null,"abstract":"On-orbit manufacturing and assembly have become major research and development topics for government and commercial entities seeking the capability to build very large structures in space. Additive manufacturing is well suited to this paradigm since the process is highly automated, produces little material waste, and allows for a large degree of geometric freedom. This paper presents a design for a 3D printer that operates in high vacuum. The vacuum 3D printer has completed multiple thermal vacuum test campaigns, with dozens of parts printed to date using low-temperature thermoplastics. Testing of material coupons shows that samples printed in vacuum have strength properties generally within a standard deviation of samples printed at ambient pressure. The overall results from multiple successful tests of the vacuum 3D printer promote the feasibility of on-orbit additive manufacturing while exposed to the space environment. This paper is part one of a two-part series. Part I presents the results using a low-temperature hotend capable of printing hobby-grade materials and documents some initial findings and lessons learned for applying FFF in vacuum. Part II presents the results for a high-temperature hotend capable of printing engineering grade plastics that are suitable for on-orbit manufacturing. The combined results of the two papers in this series can be used to inform future on-orbit additive manufacturing applications as well as potential uses on future moon missions.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk Index for the Optimal Ranking of Active Debris Removal Targets 主动碎片清除目标最优排序的风险指数

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-11 DOI: 10.2514/1.a35752

Simone Servadio, Nihal Simha, Davide Gusmini, Daniel Jang, Theodore St. Francis, Andrea D’Ambrosio, Giovanni Lavezzi, Richard Linares

{"title":"Risk Index for the Optimal Ranking of Active Debris Removal Targets","authors":"Simone Servadio, Nihal Simha, Davide Gusmini, Daniel Jang, Theodore St. Francis, Andrea D’Ambrosio, Giovanni Lavezzi, Richard Linares","doi":"10.2514/1.a35752","DOIUrl":"https://doi.org/10.2514/1.a35752","url":null,"abstract":"The first step of any active debris removal (ADR) mission is the selection of the target. The optimal choice is to find the most dangerous debris that can be removed considering the chaser spacecraft requirements and mission constraints. After creating a catalog of the current space population in low Earth orbit (LEO), the MIT Monte Carlo Orbital Capacity Assessment Tool (MOCAT-MC) is used to simulate and predict the future space environment and the interaction among the space population. A novel performance index to quantify the criticality of each debris and the risk that it presents to the space environment is proposed. The new risk index considers the proximity of the debris to highly populated regions, its persistence in orbit, its likelihood to collide, and the estimated number and mass of debris that it can generate. The risk index is then optimized to work either with the full space population or a subset of it, where the ranking of risk among debris is highlighted. Multiple risk analyses are proposed in the test cases, where the ranked list of optimal targets is provided.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136057481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Space Launch System Unsteady Forces Developed from Unsteady-Pressure-Sensitive-Paint–Based Corcos Model Parameters 基于非定常压力敏感涂料模型参数的航天发射系统非定常力研究

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-06 DOI: 10.2514/1.a35670

Francesco Soranna, Patrick S. Heaney, Martin K. Sekula, David J. Piatak, James M. Ramey

{"title":"Space Launch System Unsteady Forces Developed from Unsteady-Pressure-Sensitive-Paint–Based Corcos Model Parameters","authors":"Francesco Soranna, Patrick S. Heaney, Martin K. Sekula, David J. Piatak, James M. Ramey","doi":"10.2514/1.a35670","DOIUrl":"https://doi.org/10.2514/1.a35670","url":null,"abstract":"During atmospheric ascent, launch vehicles (LVs) experience large dynamic loads at transonic conditions where aerodynamic buffet is most critical. To estimate buffet loads, coupled loads analyses typically utilize suitable forcing functions, called buffet forcing functions (BFFs). One of the key buffet environment contributors is the turbulent boundary layer (TBL) acting on the LV outer skin. The cross-spectral density function of TBL-induced fluctuating pressures can be estimated using the widely accepted Corcos model. In the context of transonic buffet, the performance of this model is not well established, partly because of lack of data. To fill this gap, NASA recently acquired extremely high-spatial-density data for the Space Launch System vehicle using the unsteady-pressure-sensitive-paint (uPSP) optical measurement technique. A methodology is developed for extraction of the Corcos model parameters using these unique data, with a focus on the LV design application. The model hypotheses are verified, and the model parameters are empirically tuned. For selected panels on the vehicle, force coherence factors are derived based on the Corcos model, and the associated panel BFFs are compared to uPSP data. It is shown that the modeled BFFs are in agreement with direct integration of uPSP data, except for regions where pressure fluctuations are spatially nonuniform. In those regions, the Corcos-based BFFs exhibit inherent limitations of BFF estimation methods that rely on discrete pressure measurements. Lastly, extending the present implementation of the Corcos model to frequencies impacted by vortex-shedding phenomena can result in underconservative BFF estimates at the subharmonic of the vortex shedding.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135350655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tether System in Martian-Moons-eXploration-Like Mission for Phobos Surface Exploration 火卫一表面探测类火星卫星探测任务中的系绳系统

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-06 DOI: 10.2514/1.a35777

Vladimir S. Aslanov

引用次数: 1

Efficient Two-Way Coupled Analysis of Steady-State Particle-Laden Hypersonic Flows 满载粒子的高超声速稳态流动的高效双向耦合分析

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-10-04 DOI: 10.2514/1.a35731

Andrew Hinkle, Serhat Hosder, Christopher Johnston

引用次数: 0

Observed High-Altitude Surface Erosion During the Mars Science Laboratory and Mars 2020 Landings 在火星科学实验室和火星2020登陆期间观测到的高空表面侵蚀

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-09-27 DOI: 10.2514/1.a35748

Jason Rabinovitch, Soleil A. Santana, Christopher D. Karlgaard, Elizabeth T. Jens, Kathryn M. Stack, Daniel M. Turner, Wesley A. Chambers, Manish Mehta, Ashley M. Korzun

引用次数: 0

Tianwen-1 Entry, Descent, and Landing Guidance, Navigation, and Control System Design and Validation 天文一号进入、下降和着陆制导、导航和控制系统的设计和验证

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-09-25 DOI: 10.2514/1.a35673

Xiangyu Huang, Chao Xu, Minwen Guo, Maodeng Li, Jinchang Hu, Xiaolei Wang, Yu Zhao, Wangwang Liu

引用次数: 0

Comparison of Corcos-Based and Experimentally Derived Coherence Factors for Buffet Forcing Functions 基于corcos的与实验推导的Buffet强迫函数相干系数的比较

4区工程技术

Journal of Spacecraft and Rockets Pub Date : 2023-09-25 DOI: 10.2514/1.a35671

Francesco Soranna, Patrick S. Heaney, Martin K. Sekula, David J. Piatak, James M. Ramey

{"title":"Comparison of Corcos-Based and Experimentally Derived Coherence Factors for Buffet Forcing Functions","authors":"Francesco Soranna, Patrick S. Heaney, Martin K. Sekula, David J. Piatak, James M. Ramey","doi":"10.2514/1.a35671","DOIUrl":"https://doi.org/10.2514/1.a35671","url":null,"abstract":"In this paper, high-spatial-resolution unsteady pressure-sensitive paint (UPSP) data are utilized to compare two methods for panel buffet forcing function (BFF) estimation for the Space Launch System (SLS). Such methods are based on discrete pressure measurements within a panel but employ coherence factors to account for partially correlated fluctuating pressures across the whole panel. In one method, coherence factors are derived based on the Corcos model, whereas the second method utilizes experimentally derived coherence factors. To simulate discrete measurements using UPSP data, suitable subsets of the data are extracted. When full UPSP resolution is retained, UPSP data provide a benchmark to assess discrete-measurement-based methods. The analysis focuses on the peak SLS buffet environment located downstream of the forward attachment hardware (FAH) between the core stage and solid rocket boosters. Trends of the Corcos-based and experimentally derived coherence factors are in reasonable agreement with the benchmark. However, at certain frequencies, experimentally derived coherence factors are sensitive to the separation distance between pressure measurements utilized to compute coherence lengths. Such sensitivity originates from deviation of the experimentally based coherence function from an exponential decay assumption. On the other hand, the present implementation of the Corcos model fails to capture certain nonturbulent boundary-layer-related environments, such as a subharmonic of FAH vortex shedding. For all methods presented in this paper, at near-transonic conditions, increased pressure coherence and spatial nonuniformity lead to BFF overestimation and sensitivity to the pressure measurement location within the panel.","PeriodicalId":50048,"journal":{"name":"Journal of Spacecraft and Rockets","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135816122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0