MANUFACTURE OF ROCKET COMBUSTOR

摘要

PURPOSE:To obtain a coolant passage with low friction pressure drop and good cooling efficiency by using a low-melting point alloy as a filler for a groove in the manufacture of an external cylinder of a liquid rocket combustor having a grooved cooling wall. CONSTITUTION:An external cylinder of a rocket combustor is manufactured through a grooved cooling wall providing stage, a stage for filling a filler into the groove, a stage for compression molding metallic powder into a specified thickness around an internal cylinder filled with the filler in the groove, and a stage for sintering the compression molded body. In this case, a low-melting point alloy such as Wood's metal is used as the filler. Accordingly, since the filler is not deformed during compression molding, the cross-sectional shape of the groove is not changed and the sintered surface is also smoothed. The coolant passage with low friction pressure drop and good cooling efficiency can be obtained in this way.