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- W152056274 abstract "Abstract : This paper critiques existing aerodynamic-thermodynamic models for predicting the vertical motion of free balloon systems. It demonstrates that: a) the aerodynamic drag coefficient model should be based on Froude number and fractional volume as well as Reynolds number; b) there has been a widespread error in definition of the instantaneous mass of the balloon film involved in the heat transfer process; c) the gas bubble cannot be modelled as a sphere; d) the gas bubble is asymmetrical except when near or at its natural ceiling altitude; and e) the actual gas bubble shape, and most probably the added mass, is directly related to the type of gore pattern. Finally, a procedure is proposed for the analysis of actual flight data to enable the development of a practical, but also theoretically sound, model of the aerodynamic drag coefficient of a zero-pressure, free balloon- and subsequent refinement of the heat transfer models for direct and reflected solar energy." @default.
- W152056274 created "2016-06-24" @default.
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- W152056274 date "1985-05-31" @default.
- W152056274 modified "2023-09-24" @default.
- W152056274 title "Factors Affecting the Vertical Motion of a Zero-Pressure, Polyethylene, Free Balloon" @default.
- W152056274 hasPublicationYear "1985" @default.
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