Pub Date : 2023-08-26DOI: 10.1007/s13272-023-00678-7
M. Werner, M. Rein, K. Richter, S. Weiss
Abstract The flow field around a generic multi-swept delta wing configuration is investigated under transonic flow conditions, both experimentally and numerically. A special focus is on the analysis of vortex/vortex and vortex/shock interactions at moderate angles of attack. In the present study, the Mach number is varied between $$textrm{Ma} = {0.50}$$ Ma=0.50 and $$textrm{Ma} = {1.41}$$ Ma=1.41 and the angle of attack is varied between $$alpha = 8^circ$$ α=8∘ and $$alpha = 28^circ$$ α=28∘ . Numerical results are validated using experimental surface pressure data from pressure taps, as well as forces and moments based on strain gauge measurements. For selected cases, velocity field data from particle image velocimetry (PIV) measurements are available as well. Over a broad range of angle of attack and Mach number, strong vortex/vortex interactions, including vortex braiding and vortex merging, occur. The location of vortex merging is moving downstream with increasing angle of attack and increasing Mach number. Additionally, at $$textrm{Ma} = {0.85}$$ Ma=0.85 , vortex/shock interaction occurs above the wing. For moderate angles of attack, shock-induced vortex breakdown is observed.
摘要采用实验和数值方法研究了跨声速流动条件下通用多掠三角翼结构的流场。特别关注的是在中等迎角下涡/涡和涡/激波相互作用的分析。在本研究中，马赫数在$$textrm{Ma} = {0.50}$$ Ma = 0.50和$$textrm{Ma} = {1.41}$$ Ma = 1.41之间变化，攻角在$$alpha = 8^circ$$ α = 8°和$$alpha = 28^circ$$ α = 28°之间变化。数值结果使用来自压力水龙头的实验表面压力数据以及基于应变计测量的力和力矩进行验证。对于选定的情况，粒子图像测速(PIV)测量的速度场数据也是可用的。在较大的迎角和马赫数范围内，会发生强涡/涡相互作用，包括涡编织和涡合并。随着迎角的增大和马赫数的增大，涡合并的位置向下游移动。此外，在$$textrm{Ma} = {0.85}$$ Ma = 0.85时，机翼上方出现了涡/激波相互作用。对于中等迎角，可以观察到激波引起的涡流击穿。
{"title":"Experimental and numerical analysis of the aerodynamics and vortex interactions on multi-swept delta wings","authors":"M. Werner, M. Rein, K. Richter, S. Weiss","doi":"10.1007/s13272-023-00678-7","DOIUrl":"https://doi.org/10.1007/s13272-023-00678-7","url":null,"abstract":"Abstract The flow field around a generic multi-swept delta wing configuration is investigated under transonic flow conditions, both experimentally and numerically. A special focus is on the analysis of vortex/vortex and vortex/shock interactions at moderate angles of attack. In the present study, the Mach number is varied between $$textrm{Ma} = {0.50}$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mtext>Ma</mml:mtext> <mml:mo>=</mml:mo> <mml:mrow> <mml:mn>0.50</mml:mn> </mml:mrow> </mml:mrow> </mml:math> and $$textrm{Ma} = {1.41}$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mtext>Ma</mml:mtext> <mml:mo>=</mml:mo> <mml:mrow> <mml:mn>1.41</mml:mn> </mml:mrow> </mml:mrow> </mml:math> and the angle of attack is varied between $$alpha = 8^circ$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mi>α</mml:mi> <mml:mo>=</mml:mo> <mml:msup> <mml:mn>8</mml:mn> <mml:mo>∘</mml:mo> </mml:msup> </mml:mrow> </mml:math> and $$alpha = 28^circ$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mi>α</mml:mi> <mml:mo>=</mml:mo> <mml:msup> <mml:mn>28</mml:mn> <mml:mo>∘</mml:mo> </mml:msup> </mml:mrow> </mml:math> . Numerical results are validated using experimental surface pressure data from pressure taps, as well as forces and moments based on strain gauge measurements. For selected cases, velocity field data from particle image velocimetry (PIV) measurements are available as well. Over a broad range of angle of attack and Mach number, strong vortex/vortex interactions, including vortex braiding and vortex merging, occur. The location of vortex merging is moving downstream with increasing angle of attack and increasing Mach number. Additionally, at $$textrm{Ma} = {0.85}$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mtext>Ma</mml:mtext> <mml:mo>=</mml:mo> <mml:mrow> <mml:mn>0.85</mml:mn> </mml:mrow> </mml:mrow> </mml:math> , vortex/shock interaction occurs above the wing. For moderate angles of attack, shock-induced vortex breakdown is observed.","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135181507","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}
Pub Date : 2023-08-24DOI: 10.1007/s13272-023-00676-9
R. Winter, M. Norambuena, J. Sinske, Sebastian Zettel
{"title":"High-resolution vibroacoustic characterization of DLR’s Falcon 2000LX ISTAR aircraft","authors":"R. Winter, M. Norambuena, J. Sinske, Sebastian Zettel","doi":"10.1007/s13272-023-00676-9","DOIUrl":"https://doi.org/10.1007/s13272-023-00676-9","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41901162","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}
Pub Date : 2023-07-06DOI: 10.1007/s13272-023-00675-w
Patrick Authié
{"title":"A multi-model and multi-objective approach to the design of helicopter flight control laws","authors":"Patrick Authié","doi":"10.1007/s13272-023-00675-w","DOIUrl":"https://doi.org/10.1007/s13272-023-00675-w","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47799836","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}
Pub Date : 2023-07-01DOI: 10.1007/s13272-023-00674-x
Benjamín Herrmann, J. Theis, F. Thielecke
{"title":"Nonlinear system identification of a UAV model with distributed aerodynamics and flexible structure","authors":"Benjamín Herrmann, J. Theis, F. Thielecke","doi":"10.1007/s13272-023-00674-x","DOIUrl":"https://doi.org/10.1007/s13272-023-00674-x","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"14 1","pages":"661 - 677"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47578406","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}
Pub Date : 2023-07-01DOI: 10.1007/s13272-023-00668-9
Sovanna Thai, S. Theodoulis, C. Roos, J. Biannic
{"title":"Robust gain-scheduled autopilot design with anti-windup compensation for a guided projectile","authors":"Sovanna Thai, S. Theodoulis, C. Roos, J. Biannic","doi":"10.1007/s13272-023-00668-9","DOIUrl":"https://doi.org/10.1007/s13272-023-00668-9","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"14 1","pages":"765 - 786"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49316569","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}
Pub Date : 2023-07-01DOI: 10.1007/s13272-023-00673-y
M. Bartelt, P. Horst, S. Heimbs
{"title":"Effects of an enhanced fibre–matrix adhesion on the fatigue behaviour of composite materials under very high cycle fatigue","authors":"M. Bartelt, P. Horst, S. Heimbs","doi":"10.1007/s13272-023-00673-y","DOIUrl":"https://doi.org/10.1007/s13272-023-00673-y","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"14 1","pages":"753 - 763"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45948094","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}
Pub Date : 2023-06-30DOI: 10.1007/s13272-023-00671-0
J. Yin, Karl-Stéphane Rossignol, Lukas Rottmann, T. Schwarz
{"title":"Numerical studies on small rotor configurations with validation using acoustic wind tunnel data","authors":"J. Yin, Karl-Stéphane Rossignol, Lukas Rottmann, T. Schwarz","doi":"10.1007/s13272-023-00671-0","DOIUrl":"https://doi.org/10.1007/s13272-023-00671-0","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47115513","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}
Pub Date : 2023-06-27DOI: 10.1007/s13272-023-00665-y
Patrick Sieb, J. Michelmann, F. Flöter, K. Wicke
{"title":"Identifying challenges in maintenance planning for on-demand UAM fleets using agent-based simulations","authors":"Patrick Sieb, J. Michelmann, F. Flöter, K. Wicke","doi":"10.1007/s13272-023-00665-y","DOIUrl":"https://doi.org/10.1007/s13272-023-00665-y","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":"14 1","pages":"637 - 660"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41395829","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}
Pub Date : 2023-06-16DOI: 10.1007/s13272-023-00672-z
James H. Stephenson, Mary L. Houston
{"title":"Rotorcraft source noise characterization via acoustic snapshot array: development and evaluation","authors":"James H. Stephenson, Mary L. Houston","doi":"10.1007/s13272-023-00672-z","DOIUrl":"https://doi.org/10.1007/s13272-023-00672-z","url":null,"abstract":"","PeriodicalId":38083,"journal":{"name":"CEAS Aeronautical Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44837964","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}
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