Accession Number:

ADA026615

Title:

Passive Nosetip Technology (PANT) Program. Volume 19. Hydrometeor/Shock Layer Interaction Study

Descriptive Note:

Interim rept. Dec 1974-Jun 1975

Corporate Author:

ACUREX CORP/AEROTHERM MOUNTAIN VIEW CA

Personal Author(s):

• Nicolet, W. E.
• Wool, M. R.
• Laub, B.
• Jaffe, N. A.

Report Date:

1975-08-01

Pagination or Media Count:

81.0

Abstract:

Hypersonic vehicles during reentry may experience extensive damage due to encounters with condensed phase H2Ohydrometeors in the form of either ice particles or liquid droplets. These encounters, which can lead to augmented heating rates and mechanical erosion, must traverse the shocked gas enveloping the reentry vehicle prior to impacting the surface. The shock layer can, depending on flight conditions, vehicle configuration, and particle size, have a marked influence on the hydrometeors traversing the region between the shock wave and the body surface. Hence, an understanding of hydrometeorshock layer interaction is required in order to predict impact conditions from specified vehicle configuration and free stream conditions. This report documents the results of an investigation directed at surveying a portion of the phenomenology associated with the interaction between water droplets and strong shock waves.

Descriptors:

• *HEAT TRANSFER
• *METEOROLOGICAL PHENOMENA
• *NOSE TIPS
• *REENTRY VEHICLES
• CONVECTION
• DROPS
• HYDROMETEORS
• IMPACT
• INTERACTIONS
• MASS TRANSFER
• MATHEMATICAL ANALYSIS
• PARTICLES
• SHOCK WAVES
• TRAJECTORIES

Subject Categories:

• Guided Missile Trajectories, Accuracy and Ballistics
• Guided Missile Reentry Vehicles
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE