This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Base Pressure Measurements on a Model of a Turbine Blade Trailing Edge
Published January 01, 1987 by Institution of Mechanical Engineers in United Kingdom
Base pressure and aerodynamic loss have been measured in a wind tunnel model simulating a transonic turbine blade. The measurements show that a major part of the loss depends upon the value of the base pressure. This loss occurs downstream of the trailing edge although it is pre-determined by conditions on the blade. It is found that the shape of the surface boundary layers before they separate from the trailing edge and, under certain flow conditions, the back pressure, are important factors influencing the value of base pressure. These facts were neglected in all previous experimental and theoretical investigations.