EXPERIMENTAL STUDIES OF LOW-DENSITY EFFECTS IN HYPERSONIC WEDGE FLOWS
Abstract
Experimental heat transfer and pressure data are presented which extend from the classical thin boundary layer regime to near-free-molecule flow (Knudsen numbers based on ambient stream conditions as large as 5). These data are compared with viscous shock layer theory for heat transfer and with theory for the combined effects of wedge angle and boundary layer displacement to define the theoretical range of validity and to identify the low density departures from boundary layer theory. It is noted that low density effects are first evident in the pressure data. It is concluded that the cause of these departures cannot be identified within existing solutions based on the Navier- Stokes relations. It is hypothesized that the departures might stem from second- order (Burnett) molecular effects.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1964
- Accession Number
- AD0616898
Entities
People
- J. A. Bartz
- R. J. Vidal
Organizations
- Calspan