摘要: Plume core flow samples which could be analyzed for both gaseous and particle content were obtained during the firing of Inertial Upper Stage (IUS) motors DS4A (Feb. 13, 1981) and DS8C (July 30, 1981) in the AEDC Test Cell J-5 at ... 展开 Plume core flow samples which could be analyzed for both gaseous and particle content were obtained during the firing of Inertial Upper Stage (IUS) motors DS4A (Feb. 13, 1981) and DS8C (July 30, 1981) in the AEDC Test Cell J-5 at a simulated altitude of 120 Kft. During the DS4A test, samples were obtained with a tungsten-tipped probe located 10 in. off centerline and 87 in. downstream of the nozzle exit. Three samples were obtained at 1.5, 13.5, and 23.8 sec into the firing. Results of the sampling were generally satisfactory, and the probe held up during the sampling period. Analysis of the gas samples gave expected species concentrations. Analysis of the solid material collected revealed that the rocket produced exclusively aluminum oxide with most of the particles less than 2 microns in diameter. Three tungsten-tipped probes were used during the DS8C motor firing. Two probes were located 87 in. downstream, one at the centerline (using water ingestion, 60 g of particles were obtained). The third probe was located 57 in. downstream on the nozzle exit angle. The DS8C analysis compares very well with the DS4A data. 收起