Accession Number : AD0292933

Title :   BOUNDARY LAYER CONTROL-DRAG REDUCTION BY USE OF COMPLIANT COATINGS

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC

Personal Author(s) : PURYEAR, F.W.

Report Date : NOV 1962

Pagination or Media Count : 14

Abstract : Tests were conducted on 6 models of identical size to determine whether a reduction in drag could be obtained by the use of compliant coatings (trademarked Lamiflo) to stabilize a laminar boundary layer. Two noncompliant plastic models were manufactured. One was used as a standard for comparing the drag obtained on four models covered with various compliant coatings, and the other was instrumented with pressure taps in order to obtain body pressure measurements. None of the compliant bodies showed a drag reduction. The inability, during fabrication and testing, to maintain a faired transition from the metal nose adapter ring to the coating caused separation to occur at this discontinuity and probably turbulent flow to exist in an area designed to be laminar. Laminar flow on the forward portion of the coating is required if the coating is to stabilize the laminar boundary layer. (Author)

Descriptors :   *COATINGS, *LAMINAR BOUNDARY LAYER, CALIBRATION, DEFORMATION, DEGRADATION, DYNAMOMETERS, INSTRUMENTATION, MODEL TESTS, PLASTICS, PRESSURE, REDUCTION, TEST EQUIPMENT.

Distribution Statement : APPROVED FOR PUBLIC RELEASE