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The drag of spherical rubber balloons
Author(s) -
Mapleson W. W.
Publication year - 1954
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49708034517
Subject(s) - drag coefficient , drag , radiosonde , anemometer , balloon , reynolds number , meteorology , calibration , range (aeronautics) , geology , environmental science , physics , mechanics , materials science , turbulence , medicine , cardiology , quantum mechanics , composite material
An empirical relation C d = 2.7 × 10 5 R −1 is given between drag coefficient, C a , and Reynolds number R , for a captive, nominally spherical, rubber balloon, for the range log 10 R = 5.1 to 5.8. It is suggested that the drag increases as the shape of the balloon progressively deviates from the spherical. A calibration of a Meteorological Office radiosonde windmill as a cup anemometer is also included.