초록 ▼

An effusion cooled transition duct for transferring hot gases from a combustor to a turbine is disclosed. The transition duct includes a panel assembly with a generally cylindrical inlet end and a generally rectangular exit end with an increased first and second radius of curvature, a generally cyli

An effusion cooled transition duct for transferring hot gases from a combustor to a turbine is disclosed. The transition duct includes a panel assembly with a generally cylindrical inlet end and a generally rectangular exit end with an increased first and second radius of curvature, a generally cylindrical inlet sleeve, and a generally rectangular end frame. Cooling of the transition duct is accomplished by a plurality of holes angled towards the end frame of the transition duct and drilled at an acute angle relative to the outer wall of the transition duct. Effusion cooling geometry, including coverage area, hole size, and surface angle will be optimized in the transition duct to tailor the temperature levels and gradients in order to minimize thermally induced stresses. The combination of the increase in radii of curvature of the panel assembly with the effusion cooling holes reduces component stresses and increases component life.

대표청구항 ▼

An effusion cooled transition duct for transferring hot gases from a combustor to a turbine is disclosed. The transition duct includes a panel assembly with a generally cylindrical inlet end and a generally rectangular exit end with an increased first and second radius of curvature, a generally cyli

An effusion cooled transition duct for transferring hot gases from a combustor to a turbine is disclosed. The transition duct includes a panel assembly with a generally cylindrical inlet end and a generally rectangular exit end with an increased first and second radius of curvature, a generally cylindrical inlet sleeve, and a generally rectangular end frame. Cooling of the transition duct is accomplished by a plurality of holes angled towards the end frame of the transition duct and drilled at an acute angle relative to the outer wall of the transition duct. Effusion cooling geometry, including coverage area, hole size, and surface angle will be optimized in the transition duct to tailor the temperature levels and gradients in order to minimize thermally induced stresses. The combination of the increase in radii of curvature of the panel assembly with the effusion cooling holes reduces component stresses and increases component life. ncluding an atmospheric air intake port connected through an atmospheric air intake passage to a source of atmospheric air, an air tank outlet port connected through an air tank outlet passage to the air tank for, at times, supplying compressed air to the air tank; a controllable valve at each of said ports for controlling the flow of gas through the port; and a control system including an input connected to a position sensor linked to the mechanical power output for inputting the instantaneous position of the power output and including outputs connected to the valves for independently operating each expansible chamber device alternatively in a mode selected from the modes of internal, combustion engine, air motor, and air compressor, the improvement comprising: supercharging the atmospheric air supplied to the air intake passage while simultaneously supplying air to the air tank through the air tank outlet port by compression in the expansible chamber device operating in the air compressor mode. 4. An improved method for two cycle operation of a hybrid, expansible chamber engine system including a fuel source; an ignition source; an air tank for storing pressurized air; at least one expansible chamber device having a piston drivingly linked to a common mechanical power output, each expansible chamber device having ports opening into its chamber including an atmospheric air intake port connected through an atmospheric air intake passage to a source of atmospheric air, a tank air intake port connected through a tank air intake passage to said air tank, an air tank outlet port connected through an air tank outlet passage to the air tank for, at times, supplying compressed air to the air tank; a controllable valve at each of said ports for controlling the flow of gas through the port; and a control system including an input connected to a position sensor linked to the mechanical power output for inputting the instantaneous position of the power output and including outputs connected to the valves for independently operating each expansible chamber device alternatively in a mode selected from the modes of internal combustion engine, air motor, and air compressor, the improvement comprising: opening the air tank inlet port valve near zero degrees in the engine cycle to provide combustion supporting air into the chamber and maintaining the air tank inlet port valve open for a length of time which an increasing function of the quantity of air to be admitted into the chamber. 5. In a hybrid, expansible chamber engine system including a fuel source; an ignition source; an air tank for storing pressurized air; at least one expansible chamber device having a piston drivingly linked to a common mechanical power output, each expansible chamber device having ports opening into its chamber including an atmospheric air intake port connected through an atmospheric air intake passage to a source of atmospheric air, an air tank outlet port connected through an air tank outlet passage to the air tank for, at times, supplying compressed air to the air tank; a controllable valve at each of said ports for controlling the flow of gas through the port; and a control system including an input connected to a position sensor linked to the mechanical power output for inputting the instantaneous position of the power output and including outputs connected to the valves for independently operating each expansible chamber device alternatively in a mode selected from the modes of internal combustion engine, air motor, and air compressor, an improved method for increasing the pressure at which air is pumped to the air tank, the improvement comprising: (a) reducing the top dead center clearance at the top of the piston to increase the compression ratio; and (b) increasing the pressure of the compressed air supplied to the air tank by controllably opening the valve at the air tank outlet port at a later phase angle in the engine cycle. 6. A metho