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| 1 | A study of morphing aircraft on morphing rules along trajectory显示文摘Morphing aircraft can meet requirements of multi-mission during the whole flight due to changing the aerodynamic shape,so it is necessary to study itsmorphing rules along the trajectory.However,trajectory planning considering morphing variables requires a huge number of expensive CFD computations due to the morphing in view of aerodynamic performance.Under the given missions and trajectory,to alleviate computational cost and improve trajectory-planning efficiency formorphing aircraft,an offline optimizationmethod is proposed based onMulti-Fidelity Kriging(MFK)modeling.The angle of attack,Mach number,sweep angle and axial position of the morphing wing are defined as variables for generating training data for building the MFK models,in which many inviscid aerodynamic solutions are used as low-fidelity data,while the less high-fidelity data are obtained by solving viscous flow.Then the built MFK models of the lift,drag and pressure centre at the different angles of attack andMach numbers are used to predict the aerodynamic performance of the morphing aircraft,which keeps the optimal sweep angle and axial position of the wing during trajectory planning.Hence,themorphing rules can be correspondingly acquired along the trajectory,aswell as keep the aircraftwith the best aerodynamic performance during thewhole task.The trajectory planning of amorphing aircraft was performed with the optimal aerodynamic performance based on the MFK models,built by only using 240 low-fidelity data and 110 high-fidelity data.The results indicate that a complex trajectory can take advantage of morphing rules in keeping good aerodynamic performance,and the proposed method is more efficient than trajectory optimization by reducing 86%of the computing time. | Xiaoyu CHEN Chunna LI Chunlin GONG Liangxian GU Andrea Da RONCH | 2021 | Chinese Journal of Aeronautics2021，34，7： | 8 |
| 2 | A modified airfoil-based piezoaeroelastic energy harvester with double plunge degrees of freedom显示文摘In this letter,a piezoaeroelastic energy harvester based on an airfoil with double plunge degrees of freedom is proposed to additionally take advantage of the vibrational energy of the airfoil pitch motion.An analytical model of the proposed energy harvesting system is built and compared with an equivalent model using the well-explored pitch-plunge configuration.The dynamic response and average power output of the harvester are numerically studied as the flow velocity exceeds the cut-in speed(flutter speed).It is found that the harvester with double-plunge configuration generates 4%–10% more power with varying flow velocities while reducing 6% of the cut-in speed than its counterpart. | Yining Wu Daochun Li Jinwu Xiang Andrea Da Ronch | 2016 | Theoretical & Applied Mechanics Letters2016，6，5： | 2 |
| 3 | Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow显示文摘Analytical indicial aerodynamic functions are calculated for several trapezoidal wings in subsonic flow, with a Mach number 0.3 Ma 0.7. The formulation herein proposed extends wellknown aerodynamic theories, which are limited to thin aerofoils in incompressible flow, to generic trapezoidal wing planforms. Firstly, a thorough study is executed to assess the accuracy and limitation of analytical predictions, using unsteady results from two state-of-the-art computational fluid dynamics solvers as cross-validated benchmarks. Indicial functions are calculated for a step change in the angle of attack and for a sharp-edge gust, each for four wing configurations and three Mach numbers. Then, analytical and computational indicial responses are used to predict dynamic derivatives and the maximum lift coefficient following an encounter with a one-minus-cosine gust. It is found that the analytical results are in excellent agreement with the computational results for all test cases. In particular, the deviation of the analytical results from the computational results is within the scatter or uncertainty in the data arising from using two computational fluid dynamics solvers. This indicates the usefulness of the developed analytical theories. | Andrea DA RONCH Antonino VENTURA Marcello RIGHI Matteo FRANCIOLINI Marco BERCI Daniel KHARLAMOV | 2018 | Chinese Journal of Aeronautics2018，31，4： | 2 |
| 4 | Understanding cellular response to toxic agents:a model for mechanism choice in bacterial metal resistance 显示文摘 | Ronch D A Lee T D B Morby A P | 1995 | Ind Microbiol1995，14，： | 1 |
| 5 | Com- putational fluid dynamics framework for aerodynamic model assessment显示文摘 | VALLESPIN D BADCOCK K J RONCH A DA | 2012 | Progress in Aerospace Sciences2012，52，： | 1 |
| 6 | Gastrointestinal stromal tumor:spiral computed tomography features and pathologic correlation显示文摘 | DA RONCH T MODESTO A BAZZOCCHI M | 2006 | Radiol Med2006，111，5： | 1 |
| 7 | Evaluation of dynamic derivatives using computational flu- iddynamics显示文摘 | RONCH A D VALLESPIN D GHOREYSHI M | 2012 | AIAAJournal2012，50，2： | 1 |
| 8 | 基于非线性涡格法的快速静气动弹性数值模拟技术显示文摘基于2.5D RANS数据和VLM耦合的方式,发展了一种考虑非线性流动效应的混合型涡格法HVLM.采用矩形直/后掠机翼两个外形的跨声速算例,通过与VLM、三维CFD计算数据的比较,对HVLM的气动力预测精度进行了分析与评估.对比结果表明,HVLM在大幅降低时间成本的前提下可以获得和三维CFD方法预测值十分接近的计算数据,对线化VLM方法的修正效果显著.然后,HVLM与悬臂梁有限元求解耦合,实现了一种面向三维机翼的快速静气动弹性数值模拟技术,并通过矩形直机翼算例进行了验证.耦合算例的时间分析数据表明,HVLM/Beam耦合的方式能够在10 s以内完成1次三维机翼静气动弹性分析,在气动/结构耦合分析、优化设计方面展示出了良好的应用前景. | 孙岩 Andrea Da Ronch 王运涛 孟德虹 洪俊武 许贤超 | 2020 | 气体物理2020，5，6： | 1 |
| 9 | Variations in ex-ttacellular monoamines in the prefrontal cortex and medial hy-pothalamus after modafinil administration:a microdialysis study in rats显示文摘 | De Saint Hilaire Z Orosco M Ronch C | 2001 | Neuroreport2001，12，16： | 1 |
| 10 | Gastrointestinal stromal tumor:spiral computed tomography features and pathologic correlation显示文摘 | Da Ronch T Modesto A Bazzocchi M | 2006 | Radiol Med2006，111，： | 1 |
| 11 | Gastrointestinal stromal tumour: spiral computed tomography features and pathologic correlation显示文摘 | T. Ronch A. Modesto M. Bazzocchi | 2006 | La radiologia medica2006，，5： | 1 |
| 12 | Gastrointestinal stromal tumour: spiral computed tomography features and pathologic corre- lation 显示文摘 | Da Ronch T Modesto A Bazzocchi M | 2006 | Radiol Med2006，111，5： | 1 |
| 13 | Gastrointestinalstromal tumor: sprial computed tomography features andpathologic correlation 显示文摘 | Da Ronch T Modesto A Bazzocchi M | 2006 | Radiol Med2006，111，5： | 1 |
| 14 | l_(1)-based calibration of POD-Galerkin models of two-dimensional unsteady flows显示文摘This paper discusses a physics-informed methodology aimed at reconstructing efficiently the fluid state of a system.Herein,the generation of an accurate reduced order model of twodimensional unsteady flows from data leverages on sparsity-promoting statistical learning techniques.The cornerstone of the approach is l_(1) regularised regression,resulting in sparselyconnected models where only the important quadratic interactions between modes are retained.The original dynamical behaviour is reproduced at low computational costs,as few quadratic interactions need to be evaluated.The approach has two key features.First,interactions are selected systematically as a solution of a convex optimisation problem and no a priori assumptions on the physics of the flow are required.Second,the presence of a regularisation term improves the predictive performance of the original model,generally affected by noise and poor data quality.Test cases are for two-dimensional lid-driven cavity flows,at three values of the Reynolds number for which the motion is chaotic and energy interactions are scattered across the spectrum.It is found that:(A)the sparsification generates models maintaining the original accuracy level but with a lower number of active coefficients;this becomes more pronounced for increasing Reynolds numbers suggesting that extension of these techniques to real-life flow configurations is possible;(B)sparse models maintain a good temporal stability for predictions.The methodology is ready for more complex applications without modifications of the underlying theory,and the integration into a cyberphysical model is feasible. | Riccardo RUBINI Davide LASAGNA Andrea DA RONCH | 2021 | Chinese Journal of Aeronautics2021，34，1： | 1 |
| 15 | Tamsu losin treatment increases clinical success rate of single extractor preal shock wave lithotripsy of renal stones显示文摘 | GRAVINA GL CO STA AM RONCH IP | 2005 | Urology2005，66，1： | 1 |
| 16 | Gastrointestinal stromal tumor:spiral computed tomography features and pathologic cot relation显示文摘 | Da Ronch T Modesto A Bazzocchi M | 2006 | Radiol Med2006，111，5： | 1 |
| 17 | Gastrointestinal stromal tumor:spiral computed tomography features and pathologic cor- relation显示文摘 | Da Ronch T Modesto A Bazzocchi M | 2006 | Radiol Med2006，111，5： | 1 |
| 18 | Evaluation of dynamic derivatives using computational fluid dynamics显示文摘 | Ronch A D Vallespin D Ghoreyshi M | 2012 | AIAA Journal2012，50，2： | 1 |
| 19 | Gastrointestinal stromal tumor:spiral computed tomography features and pathologic correlation显示文摘 | Da Ronch T Modesto A Bazzocchi M | | 0，，5： | 1 |
| 20 | Effects of sodium artesunate,a new antimalarial drug,on renal function显示文摘 | Campos SB Ronch LH Seguro AC | 2001 | Kidney Int2001，59，： | 1 |
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