CYLINDER-HEAD TEMPERATURES AND COOLANT HEAT REJECTION OF A MULTICYLINDER LIQUID-COOLED ENGINE OF 1650-CUBIC-INCH DISPLACEMENT

摘要

An extensive investigation of the cooling characteristics of a multicylinder liquid-cooled, engine of 1650-cubic-inch displace¬ment was conducted at the NACA Cleveland laboratory. The results of this investigation showing the variation of the cylinder-head temperature and the coolant heat rejection with the pertinent engine and coolant variables are presented. These data include engine power outputs up to 2000 brake horsepower and wide ranges of engine speed, manifold pressure, fuel-air ratio, inlet-air tem¬perature, ignition timing, exhaust pressure, and coolant flow, composition, temperature, and pressure. Runs were made with coolant flows as low as 49 gallons per minute in order to investi¬gate the cooling characteristics of this engine under boiling conditions.