Development and Preliminary Investigation of a Method of Obtaining Hypersonic Aerodynamic Data by Firing Models Through Highly Cooled Gases
Abstract
A method of investigating hypersonic aerodynamic phenomena by firing simple symmetrical models at high velocity through a very cold gas having a low sonic velocity has been developed. The high model velocities were produced in a commercially available gun, whereas the low acoustical velocities were attained by liquid nitrogen cooling of the test gas. Schlieren photographs and "focused" shadowgraphs were taken of cylindrical models having conical forebodies with apex angles of 30, 45 and 60 degrees. In these tests a short-duration light source was used; a rotating-mirror camera was added in order to obtain sharp-focused shadowgraphs. The conical shock angles were measured at a Mach number of about 6.7 and were found to agree with values computed theoretically within the limits of the accuracy of the present system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1950
- Accession Number
- ADA380677
Entities
People
- Alexander P. Sabol
- Harold V. Soule
Organizations
- National Aeronautics and Space Administration