Studies of ground effect on a 60º inwardly inclined annular jet. Part II Base plate thrust augmentation and pressure distribution; effects of aspects ration, pressure ratio and height above ground; jet stability

Flutter of a two-dimensional, simply supported buckled panel with elastic restraint against edge displacement

The critical flutter speed is evaluated for a two-dimensional thin buckled panel with one surface exposed to a supersonic airstream and the other to still air at the same static pressure. The panel is simply supported along the leading and trailing edges by rigid edge members separated by an elastic member represented by a compression spring....

Lubricant behaviour in concentrated contact. The effect of temperature

Experiments are described on the frictional behaviour of a petroleum oil in the contact zOne between a steel roller ~nd an aluminum one at 23° C and between steel rollers and between tungsten carbide rollers at 23°C, 100°C and 190°C. The coefficient of sliding friction decreases with increasing temperature. Qualitatively, this is taken to...

Calculation of the flow past slender delta wings with leading edge separation

The flow past a slender delta wing with a sharp leading edge, at incidence, usually separates along this edge, i.e. a vortex layer extends from the edge and rolls up to form a "core" (a region of high vorticity). A potential flow model of this is constructed in which the layer is replaced by a vortex sheet which is rolled up into a spiral in the...

Analog equipment for processing randomly fluctuating data

Report of the Advisory Committee for the William Froude National Tank for Year ending December 13st, 1925