SCHRENK

GERMANY (see also List of Individuals)

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16.5.1901 Wain/D - 18.8.1990 Ottobeuren/D

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Oskar Schrenk graduated in 1924 from Stuttgart Technical University to submit a PhD thesis to the Aachen University of Technology in 1935. Schrenk became in the meantime a department head of the Aerodynamische Versuchs-Anstalt AVA and a collaborator of Ludwig Prandtl (1875-1953) at Göttingen University. From 1939 he was the principal aerodynamicist of Heinkel aviation works in Rostock, directed by Ernst Heinkel (1888-1958). Schrenk was appointed in 1943 associate professor at Vienna Technical University, a position he had to resign after World War II. He collaborated then with the French aviation works MATRA in Paris until 1955. From 1960 Schrenk collaborated with the Dornier works in Friedrichshafen.

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Schrenk's thesis was an investigation of wings with a suction mechanism to inhibit separation phenomena for steep angles of attack. The research resulted in the 1930s in a test airplane involving boundary layer suction to increase the lift force with a decrease of the required take-off and landing velocities. His 1930 paper introduces a simple regulation mechanism for wind tunnels. Schrenk also investigated the noise produced by wind tunnel propellers. In 1926 he investigated certainly with the interest of Prandtl boundary layer suction from spheres, a topic of dispute between the latter and Gustave Eiffel (1832-1923) in the early 1910s. Also, Schrenk worked on the inertial effects of anemometers during unsteady flow. In 1938 and 1939 Schrenk returned to problems with wings to study the effects of winglets on wing performance, and to compute the pressure and velocity distributions in the transverse direction.

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_{Anonymous (1929). Dipl.-Ing. O. Schrenk. Messtechnik 5(2): 62. P}

_{Poggendorff, J.C. (1936). Schrenk, Oscar. Biographisch-Literarisches Handwörterbuch 6: 2369; 7a: 257; 8: 2160. Chemie-Verlag: Leipzig, Berlin, with bibliography.}

_{Schrenk, O. (1926). Versuche an einer Kugel mit Grenzschichtabsaugung. Zeitschrift für Flugtechnik und Motorluftschiffahrt 17(17): 366-372.}

_{Schrenk, O. (1927). Systematische Untersuchungen an Joukowsky-Profilen. Zeitschrift für Flugtechnik und Motorluftschiffahrt 18(10): 225-230; 18(12): 276-284.}

_{Schrenk, O. (1930). Ein einfacher Druckund Geschwindigkeitsregler für Versuchsgebläse und Windkanäle. Ingenieur-Archiv 1: 350-355.}

_{Schrenk, O. (1956). Eine anschauliche Herleitung des Impulssatzes der Grenzschichttheorie. Zeitschrift für Flugwissenschaften 4(1/2): 27-28.}

_{Walz, A. (1966). Oskar Schrenk 65 Jahre. Zeitschrift für Flugwissenschaften 14(5): 248. P}