A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tu...A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tunnel test was to investigate the aerodynamic performance of the latest BWB transport design,which would also aid in choosing a final engine arrangement in the three most potential engine integration layouts.The wind tunnel model can be tested with and without the nacelle and has three sets of different nacelle/tail integration positions.Computational Fluid Dynamics(CFD)simulations were performed in engine-aircraft integration design to find appropriate nacelle installing parameters of each layout.The comparison of CFD with experimental results shows good agreement.Wind tunnel measurements indicate that the tail-mounted engine layout produces the minimum drag penalty,while the fuselage-mounted engine layout increases drag the most.Experimental pressure measurement illustrates the effect of nacelle integration on the wing-body surface pressure distribution.This experimental and numerical research provides a reference for future BWB Propulsion-Airframe Integration(PAI)design.展开更多
Static rechargeable zinc-iodine(Zn-I_(2))batteries are superior in safety,costeffectiveness,and sustainability,giving them great potential for large-scale energy storage applications.However,the shuttle effect of poly...Static rechargeable zinc-iodine(Zn-I_(2))batteries are superior in safety,costeffectiveness,and sustainability,giving them great potential for large-scale energy storage applications.However,the shuttle effect of polyiodides on the cathode and the unstable anode/electrolyte interface hinder the development of Zn-I_(2)batteries.Herein,a self-segregated biphasic electrolyte(SSBE)was proposed to synergistically address those issues.The strong interaction between polyiodides and the organic phase was demonstrated to limit the shuttle effect of polyiodides.Meanwhile,the hybridization of polar organic solvent in the inorganic phase modulated the bonding structure,as well as the effective weakening of water activity,optimizing the interface during zinc electroplating.As a result,the Zn-I_(2)coin cells performed a capacity retention of nearly 100%after 4000 cycles at 2 mA cm^(-2).And a discharge capacity of 0.6 Ah with no degradation after 180 cycles was achieved in the pouch cell.A photovoltaic energy storage battery was further achieved and displayed a cumulative capacity of 5.85 Ah.The successfully designed energy storage device exhibits the application potential of Zn-I_(2)batteries for stationary energy storage.展开更多
基金This study was co-supported by the Beijing Key Laboratory of Simulation Technology for Civil Aircraft Design,China(No.11WX08)Innovation Foundation of COMAC Beijing Aircraft Technology Research Institute,China(No.Y16QT01).
文摘A 2%scale,cruising version of a 450-seat class Blended-Wing-Body(BWB)transport was tested in the China Aerodynamic Research and Development Center’s FL-262.4-by-2.4-meter subsonic wind tunnel.The focus of the wind tunnel test was to investigate the aerodynamic performance of the latest BWB transport design,which would also aid in choosing a final engine arrangement in the three most potential engine integration layouts.The wind tunnel model can be tested with and without the nacelle and has three sets of different nacelle/tail integration positions.Computational Fluid Dynamics(CFD)simulations were performed in engine-aircraft integration design to find appropriate nacelle installing parameters of each layout.The comparison of CFD with experimental results shows good agreement.Wind tunnel measurements indicate that the tail-mounted engine layout produces the minimum drag penalty,while the fuselage-mounted engine layout increases drag the most.Experimental pressure measurement illustrates the effect of nacelle integration on the wing-body surface pressure distribution.This experimental and numerical research provides a reference for future BWB Propulsion-Airframe Integration(PAI)design.
基金National Natural Science Foundation of China,Grant/Award Numbers:52372252,51932011Newly Introduced Scientific Research Start-up Funds for High-tech Talents,Grant/Award Number:DD11409024Fundamental Research Funds for the Central Universities of Central South University,Grant/Award Number:2024ZZTS0642。
文摘Static rechargeable zinc-iodine(Zn-I_(2))batteries are superior in safety,costeffectiveness,and sustainability,giving them great potential for large-scale energy storage applications.However,the shuttle effect of polyiodides on the cathode and the unstable anode/electrolyte interface hinder the development of Zn-I_(2)batteries.Herein,a self-segregated biphasic electrolyte(SSBE)was proposed to synergistically address those issues.The strong interaction between polyiodides and the organic phase was demonstrated to limit the shuttle effect of polyiodides.Meanwhile,the hybridization of polar organic solvent in the inorganic phase modulated the bonding structure,as well as the effective weakening of water activity,optimizing the interface during zinc electroplating.As a result,the Zn-I_(2)coin cells performed a capacity retention of nearly 100%after 4000 cycles at 2 mA cm^(-2).And a discharge capacity of 0.6 Ah with no degradation after 180 cycles was achieved in the pouch cell.A photovoltaic energy storage battery was further achieved and displayed a cumulative capacity of 5.85 Ah.The successfully designed energy storage device exhibits the application potential of Zn-I_(2)batteries for stationary energy storage.
