Influence of Added Mass and Moment on Aerodynamic Performanceand Open-loop Response of Large Airship

TAO Shancong;LYU Da;ZHANG Shiyu;LYU Meng;SHI Xiaotian;ZHOU Jianghua

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    Published By: Journal Of Ballistics

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Journal Of Ballistics ›› 2022, Vol. 34 ›› Issue (03) : 11-18. DOI: 10.12115/j.issn.1004-499X(2022)03-002

Influence of Added Mass and Moment on Aerodynamic Performanceand Open-loop Response of Large Airship

  • TAO Shancong1,LYU Da1,ZHANG Shiyu1,LYU Meng1,SHI Xiaotian1,ZHOU Jianghua2
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Abstract

The airship flying in the near space is bulky to maintain its own buoyancy and overcome the gravity. The reaction force of the large amount of displaced air on the airship under the viscous effect can form added mass or moment attached to the surface of airship,which is usually ignored or simply estimated in the engineering,which significantly affects the flight stability of large airship. Based on numerical simulation and flight simulation,the influence of added mass and moment on aerodynamic performance and manipulation of large airship was studied. The added mass and moment of the translation and rotation of a large airship with Y-type empennage were obtained by using the CFD technique of unsteady uniform acceleration with six degrees of freedom and overset mesh. Based on the results,the influence of the layout on the added mass of translation and moment of rotation along the y-axis and z-axis were analyzed. The influence of added mass and moment on the open-loop response was investigated by method of flight dynamics simulation. The results show that the added mass of the airship for translation along the y and z axes and the added moment for rotation around the y and z axes are approximately equal because of the layout of large airship. Otherwise,considering the added mass and moment,the speed of response of the airship is more slowly to open-loop control,which reduces manipulation.

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large airship / added mass / CFD / overset mesh

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TAO Shancong1,LYU Da1,ZHANG Shiyu1,LYU Meng1,SHI Xiaotian1,ZHOU Jianghua2. Influence of Added Mass and Moment on Aerodynamic Performanceand Open-loop Response of Large Airship. Journal Of Ballistics. 2022, 34(03): 11-18 https://doi.org/10.12115/j.issn.1004-499X(2022)03-002

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