Conceptual design and numerical simulation of a correlation diagnostic for measurement of magnetic fluctuations in plasmas

C. E. Thomas; G. R. Hanson; R. F. Gandy; D. B. Batchelor; R. C. Goldfinger

doi:10.1063/1.1140064

Emergence of intermittent structures and reconnection in MHD turbulence

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311006697 ◽

2010 ◽

Vol 6 (S274) ◽

pp. 116-119

Author(s):

Antonella Greco ◽

Sergio Servidio ◽

William H. Matthaeus ◽

Pablo Dmitruk

Keyword(s):

Numerical Simulation ◽

Solar Wind ◽

Magnetic Reconnection ◽

Numerical Algorithms ◽

Magnetic Fluctuations ◽

Mhd Turbulence ◽

Local Origin ◽

Tangential Discontinuities

AbstractIn recent analyses of numerical simulation and solar wind dataset, the idea that the magnetic discontinuities may be related to intermittent structures that appear spontaneously in MHD turbulence has been explored in details. These studies are consistent with the hypothesis that discontinuity events founds in the solar wind might be of local origin as well, i.e. a by-product of the turbulent evolution of magnetic fluctuations.Using simulations of 2D MHD turbulence, we are exploring a possible link between tangential discontinuities and magnetic reconnection. The goal is to develop numerical algorithms that may be useful for solar wind applications.

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A Conceptual Design for Deflection Device in VTDP System

10.21203/rs.3.rs-64863/v2 ◽

2020 ◽

Author(s):

Yongwei Gao ◽

Jianming Zhang ◽

Long Wang ◽

Bingzhen Chen ◽

Binbin Wei

Keyword(s):

Numerical Simulation ◽

Power Consumption ◽

Numerical Simulations ◽

Conceptual Design ◽

Lateral Force ◽

Simulation Approach ◽

Lower Power ◽

Ducted Propeller ◽

Vectored Thrust ◽

Hovering Control

Abstract The effectiveness of the Vectored Thrust Ducted Propeller (VTDP) system is not high currently, especially the lateral force is not large enough. Thus, a conceptual design for a deflection device of a VTDP system was proposed to achieve effective hovering control. The magnitude of the lateral force that was applied to maintain balance while hovering was examined. A comparison between the experimental and numerical results for the 16H-1 was made to verify the numerical simulation approach. The deflection devices of the X-49 and the proposed design were analyzed using numerical simulations. The results indicated that a larger lateral force and lower power consumption were presented in the proposed design. The results of this article provide a new idea for the design of the VTDP system.

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Research on Simulation and Performance Optimization of Mach 4 Civil Aircraft Propulsion Concept

International Journal of Aerospace Engineering ◽

10.1155/2019/2918646 ◽

2019 ◽

Vol 2019 ◽

pp. 1-19

Author(s):

Min Chen ◽

Zihao Jia ◽

Hailong Tang ◽

Yi Xiao ◽

Yonghang Yang ◽

...

Keyword(s):

Numerical Simulation ◽

Prediction Model ◽

Conceptual Design ◽

Performance Optimization ◽

Jet Noise ◽

Aircraft Engine ◽

Requirement Analysis ◽

Task Requirement ◽

Civil Aircraft ◽

And Performance

Supersonic civil aircraft is of a promising area in the development of future civil transport, and aircraft propulsion system is one of the key issues which determine the success of the aircraft. To get a good conceptual design and performance investigation of the supersonic civil aircraft engine, in this article, a fast, versatile as well as trust-worthy numerical simulation platform was established to analyze the Mach 4 turbine-based combined cycle (TBCC) engine concept so as to be applied to the supersonic civil aircraft. First, a quick and accurate task requirement analysis module was newly established to analyze the mission requirement of the Mach 4 supersonic civil aircraft. Second, the TBCC engine performance simulation model was briefly presented and the number of engines on the supersonic civil aircraft was analyzed, considering single engine inoperative. Third, the Stone model and the DLR method were investigated to estimate the engine jet noise and the NOx emission of the Mach 4 supersonic civil aircraft. Finally, a multiobjective optimization tool made up of a response surface method and a genetic algorithm was developed to optimize the design parameters and the control law of the TBCC engine, in order to make the Mach 4 supersonic civil aircraft engine with better performance, lower noise, and lower emissions. The uniqueness of the developed analysis tool lies in that it affords a numerical simulation platform capable of investigating the task requirement analysis module of the supersonic civil aircraft, engine jet noise prediction model, and the NOx emission prediction model, as well as a multiobjective performance optimization tool, which is beneficial for the conceptual design and performance research of Mach 4 supersonic civil aircraft’s propulsion system.

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A conceptual design for deflection device in VTDP system

Advances in Aerodynamics ◽

10.1186/s42774-020-00050-x ◽

2021 ◽

Vol 3 (1) ◽

Author(s):

Yongwei Gao ◽

Jianming Zhang ◽

Long Wang ◽

Bingzhen Chen ◽

Binbin Wei

Keyword(s):

Numerical Simulation ◽

Power Consumption ◽

Numerical Simulations ◽

Conceptual Design ◽

Lateral Force ◽

Simulation Approach ◽

Lower Power ◽

Ducted Propeller ◽

Vectored Thrust ◽

Hovering Control

AbstractThe effectiveness of the Vectored Thrust Ducted Propeller (VTDP) system is not high currently, especially the lateral force is not large enough. Thus, a conceptual design for a deflection device of a VTDP system was proposed to achieve effective hovering control. The magnitude of the lateral force that was applied to maintain balance while hovering was examined. A comparison between the experimental and numerical results for the 16H-1 was made to verify the numerical simulation approach. The deflection devices of the X-49 and the proposed design were analyzed using numerical simulations. The results indicated that a larger lateral force and lower power consumption were presented in the proposed design. The results of this article provide a new idea for the design of the VTDP system.

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A Conceptual Design for Deflection Device in VTDP System

10.21203/rs.3.rs-64863/v1 ◽

2020 ◽

Author(s):

Yongwei Gao ◽

Jianming Zhang ◽

Long Wang ◽

Bingzhen Chen ◽

Binbin Wei

Keyword(s):

Numerical Simulation ◽

Power Consumption ◽

Numerical Simulations ◽

Conceptual Design ◽

Lateral Force ◽

Simulation Approach ◽

Lower Power ◽

Ducted Propeller ◽

Vectored Thrust ◽

Hovering Control

Abstract A conceptual design for a deflection device of a Vectored Thrust Ducted Propeller (VTDP) system was proposed to achieve effective hovering control. The magnitude of the lateral force that was applied to maintain balance while hovering was examined. A comparison between the experimental and numerical results for the 16H-1 was made to verify the numerical simulation approach. The deflection devices of the X-49 and the proposed design were analyzed using numerical simulations. The results indicated that the proposed design provided a larger lateral force and lower power consumption.

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