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Huang H.,The Institute of Applied Meteorology | Huang H.,PLA University of Science and Technology | Xu Y.-P.,The Institute of Applied Meteorology | Deng Z.-W.,The Institute of Applied Meteorology
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2010

As the common representation of atmosphere environment, the Atmosphere Environment Federation (AEF) has been a critical element of distributed simulation system in recent years. Based on the principles of High Level Architecture (HLA), the special functional requirements of the AEF were firstly analyzed from both technical and applied viewpoints. Then some key technologies and feasible solutions were discussed, including simulation scenario generation, atmosphere environment modeling, meteorological data storage and visualization. At last, a prototype AEF system was developed and two representative applications were given. The simulation results show that, this prototype AEF is reliable, effective and useful for the future practical development of AEF. Source


Huang H.,The Institute of Applied Meteorology | Liu Y.,CAS Institute of Atmospheric Physics | Zhao Z.-L.,The Institute of Applied Meteorology | Yao Z.-G.,The Institute of Applied Meteorology
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2013

Based on the knowledge of atmospheric science, flight dynamics, computational fluid dynamics, computer simulation, etc, the influence of near space atmosphere and its prominent phenomena on supersonic vehicle was discussed. Then a practical scheme for the simulation research was worked out, and some pivotal technologies and feasible solutions were discussed, including modeling of near space atmosphere environment, high-temperature plasma of supersonic vehicle and evaluation of atmospheric environment influence. At last, some representative applications were given and analyzed. The simulation results show that, the practical scheme and those pivotal technologies are feasible, effective and useful for the future development of engineering application systems. © Copyright. Source


Huang H.,The Institute of Applied Meteorology | Huang H.,PLA University of Science and Technology | Lu H.-C.,PLA University of Science and Technology | Xu Y.-P.,The Institute of Applied Meteorology | Deng Z.-W.,The Institute of Applied Meteorology
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2010

Heavy rain might influence aerodynamic performance of an aircraft seriously, especially when it is landing. It requires an intensive investigation and quantitative analysis. Choosing Boeing 737-300 as the representative of aircraft, magnitude calculation for the penalty associated with severe rainfall was firstly made. Then the roughness factor was studied in detail using evolutional turbulence boundary function and CFD simulation tools. The aerodynamic character of Boeing 737-300 midspan airfoil was simulated under different rainfall environment. The quantitative results of lift-drag coefficients and stall angle were proposed and compared with experiment data. The results indicate that, the roughness surface caused by rainfall is most likely to cause significant aerodynamic penalties. For Boeing 737-300 midspan airfoil, when it is landing under severe rainfall of 500mm/hour over 30s periods, it could lead to the loss of maximum lift coefficient by about 28%, the decrease of stall angle by 5 and the increase of drag coefficient by 98.1%. Source

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