Abstract: A control system for an internal combustion engine and an associated pressure wave supercharger, which optimizes exhaust emissions and engine performance by automatically switching the mode of control between a cold start and white smoke mode, an altitude dependent mode, a low emissions mode, a fuel economy mode, and a particulate trap regeneration mode as the operating conditions of the engine change.

Abstract: A method for providing a scalable two tang side entry turbine blade root geometry which significantly reduces stress concentration due to centrifugal and bending load on the blade root by equalizing the stresses at all points of stress concentration utilizing a scalable model in which all of the dimensions can be multiplied by a constant to produce a range of different sized blade roots.

Abstract: A boring bar assembly for boring large diameter turbine bores in the field, the assembly utilizing a small hydraulic motor which drives a boring bar through an in line double reduction gear drive with a reduction ratio in excess of 100:1 and an output shaft which compensates for as much as 6.degree. angular misalignment between the boring bar and the output shaft of the gear box.

Abstract: A tube support grid for supporting a plurality of closely packed tubes utilizing punched bars with a plurality of resilient and stiff fingers punched into the bar and so disposed that when the bars are assembled into an egg-shaped grid, the tubes are supported on opposite sides by a resilient and a stiff finger extending from the bars.

Abstract: A feedwater heater system for a steam turbine power plant is provided which incorporates a liquid-to-liquid heat exchanger in addition to a plurality of vapor-to-liquid feedwater heaters. The advantage of this configuration is that the potential magnitude of entrained impurities within the feedwater stream is reduced without a significant increase in the overall heat rate of the steam turbine power plant. A preferred embodiment of the present invention incorporates three low pressure feedwater heaters and two high pressure feedwater heaters in conjunction with a drain cooler which is connected serially between the low and high pressure feedwater heaters. An alternative embodiment of the present invention incorporates a liquid-to-liquid heat exchanger connected hydraulically in parallel with the low pressure feedwater heaters.

Abstract: A system is shown for cooling and sealing gas turbine blade structures and discs. A coolant fluid of a required pressure enters an annular chamber radially outwardly of an annular array of stationary blades. The cooling fluid passes through these stationary blades into an inner annular chamber disposed radially inwardly of the stationary blades. The cooling fluid is permitted to leak out upstream between an upstream seal wall member of the inner annular chamber and a shoulder portion of an upstream rotor disc. The cooling fluid is also permitted to leak out downstream from the inner annular chamber between a downstream seal wall member of the inner annular chamber and a shoulder portion of a downstream rotor disc. The downstream wall member also contains angularly disposed passageways which direct jets of pressurized cooling fluid into ports on the adjacent downstream rotor disc.