Johann Hermanek

from Wikipedia, the free encyclopedia

Johann Hermanek (born May 11, 1865 in Popelín ( Moravia ), † June 15, 1905 in Mauer near Vienna ) was an Austrian hydraulic engineer and university professor .

Life

He studied civil engineering at the Technical University in Vienna until 1889 . He then worked as an engineer at the Vienna Road Construction Office, where he was able to exert a decisive influence on the planning work through detailed theoretical studies, in particular on the choice of normal profiles for the vaulting of the Vienna River . In 1897 he founded an office as a civil engineer. Among other things, he carried out the structural analysis for the new Gerngroß department store , which was completed in 1904 and was one of the first steel-framed buildings in Vienna. In 1902 an honorary lecturer for hydraulics was created at the Technical University in Vienna and transferred to Hermanek. His appointment as associate professor for the same subject took place in 1905, shortly before his death. In the same year his treatise on the mean profile velocity in channels appeared. The flow formulas it contains have been associated with his name ever since. Hermanek's simple relationship, derived from the general power formula for the mean flow velocity, with mean water depth instead of hydraulic radius and the associated exponent "l" has gained in importance again today for rough channels. It is also essential that Hermanek did not introduce a constant exponent, but used values ​​from 0.6 to 1.0.

Publications

  • The outflow at a basic weir with a curved profile. ZS. d. Austrian Ing.- u. Arch.-Ver. 57, 339-342, 1905.
  • The mean profile speed in natural and artificial channels

Individual evidence

  1. ^ Paul-Gerhard Franke , outline of the hydraulics (10 parts). Bauverlag Wiesbaden, 1969–1975, new editions 1975–1982 Paul-Gerhard Franke, considerations on the rate formula for the runoff in rough channels, water and soil 32nd year 1980 No. pp. 367–369. Richard H. Kastner [1] , The Development of Technology and Industry in Austria and the Technical University in Vienna. Technical history sheets. No. 27, pp. 1–186 Springer, Vienna, 1965
  2. ↑ Josef Nagler , Blätter für Technikgeschichte: Twenty-seventh booklet, p. 95
  3. ^ Journal of the Austrian Association of Engineers and Architects, Springer, 1905, p. 237
personal data
SURNAME Hermanek, Johann
BRIEF DESCRIPTION Austrian hydraulic engineer and university lecturer
DATE OF BIRTH May 11, 1865
PLACE OF BIRTH Popelín (Moravia)
DATE OF DEATH June 15, 1905
Place of death Wall (vienna)