An experimental investigation of a blow down turbine installed in the exhaust stream of a 12-cylinder liquid-cooled engine of 1710-cubic-inch displacement was conducted at the MCA Cleveland laboratory. Exhaust stacks from pairs of cylinders with no overlapping exhaust strokes were Joined and connected to the six turbine-nozzle segments.nThe blow down turbine and the reciprocating engine were each loaded with separate dynamometers and data were obtained for engine speeds of 2000, 2400, and 3000 rpm, engine inlet-manifold pressures of 30 and 40 inches mercury absolute, fuel-air ratios of 0.063, 0.069, and 0.085, and a range of ratios of exhaust to inlet-manifold pressure from 0.3 to 0.9. At each set of engine conditions, a range of turbine speeds sufficient to define the peak value of turbine horsepower was investigated.
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