초록 ▼

Film cooling apparatus adapted to be connected into a conduit carrying a hot exhaust gas. The apparatus comprises single walled contoured duct means connectible to said conduit and a center-body aerodynamically shaped and supported within said duct means so as to form therewith an annular channel of

Film cooling apparatus adapted to be connected into a conduit carrying a hot exhaust gas. The apparatus comprises single walled contoured duct means connectible to said conduit and a center-body aerodynamically shaped and supported within said duct means so as to form therewith an annular channel of zero pressure gradient. Slot means are provided in the single walled contoured duct means and in the center-body to enable a flow of cooling air over exterior surfaces thereof to maintain said surfaces at an acceptably low temperature. A network of ducting carries the cooling air to the contoured duct means and interior of the center-body. The duct means and center-body are preferably of circular cross-section taken orthogonally of the overall flow direction. The center-body is an axisymmetric bulb having annular slots for directing the cooling air over the exterior of said bulb. The center-body connects with a plenum chamber formed by said single walled duct means and an exterior section of the network of ducting. The plenum chamber is also connected to a source of cooling air. An entraining diffuser is connected to said contoured duct means downstream of the center-body. Slots in the center-body, duct means and entraining diffuser are preferably from about 0.25″to about 0.750″in width.

대표청구항 ▼

Film cooling apparatus adapted to be connected into a conduit carrying a hot gaseous medium, said apparatus comprising: contoured duct means for channeling the gaseous medium having an external surface, an internal surface, and a single thickness of material therebetween, said contoured duct means a

Film cooling apparatus adapted to be connected into a conduit carrying a hot gaseous medium, said apparatus comprising: contoured duct means for channeling the gaseous medium having an external surface, an internal surface, and a single thickness of material therebetween, said contoured duct means adapted to be connected to said conduit and having slot means for the passage of coolant fluid therein; a central body aerodynamically shaped and supported within said contoured duct means so as to form therewith an annular channel having a zero pressure gradient, said central body having slot means therein to enable cooling flow of a coolant fluid over exterior surfaces of the central body for maintaining an acceptably low surface temperature thereof; a network of ducting to interconnect the contoured duct means and interior of the central body to a source of said coolant fluid, said network of ducting and said contoured duct means defining a plenum chamber therebetween which is adapted to be in flow communication with said source of coolant fluid; and an entraining diffuser section connectible to downstream portions of the contoured duct means and operative to promote the entrainment of further quantities of a coolant fluid and to promote the deceleration of exhaust gases for the purposes of energy recovery.