Patent ID: 8851845

Claim:
A turbomachine comprising: a housing; at least one turbine vane arranged within the housing, the at least one turbine vane including an airfoil portion and a platform portion operatively connected to the airfoil portion, the platform portion including a first surface, an opposing second surface and a side surface that joins the first and second surfaces; a cooling cavity formed in an aft end of the platform portion, the cooling cavity including a first wall, a second wall arranged opposite the first wall, a third wall linking the first and second walls and a fourth wall linking the first and second walls and positioned opposite the third wall, each of the first, second, third and fourth walls being integrally formed with the at least one turbine vane; and an impingement cooling plate extending into the cooling cavity and defining an inner cavity portion and an outer cavity portion, the impingement cooling plate including at least one impingement cooling passage that is configured and disposed to guide an impingement cooling flow onto at least one of the first, second, third and fourth walls of the cooling cavity.