Accession Number : AD0284853

Title :   THREE-COMPONENT-MEASUREMENTS ON DELTA WINGS WITH CAVITATION

Corporate Author : MAX-PLANCK-INSTITUT FUER STROEMUNGSFORSCHUNG GOETTINGEN (WEST GERMANY)

Personal Author(s) : REICHARDT,H. ; SATTLER,W.

Report Date : JUL 1962

Pagination or Media Count : 1

Abstract : Three-component-measurements on delta wings with different apex angles (15, 30, 45, 60 degrees) and at different cavitation numbers were undertaken. These measurements showed that the lift coefficient cL as a function of the angle of incidence is in agreement with the theory of K. Gersten (Tragflugeltheorie bei Unterschallgeschwindigkeit. WGL-Jahrbuch 1958 S.25), if there is no cavitation. The cavitation reduces the lift with increasing size of the pocket. For small angles of incidence the cL(alpha)-curves asymptotically approach the limiting curve for lift of cavitation-free flow. This could be qualitatively explained by means of photographs of the flow. These photographs also show that two separate pockets develop on the suction side of a delta wing, and these remain separated even for the smallest cavitation numbers. (Author)

Descriptors :   *CAVITATION, *DELTA WINGS, *HYDROFOILS, FLUID FLOW, MEASUREMENT, MODEL TESTS, STRAIN GAGES, WATER TUNNELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE