EFFECTIVENESS OF A GAS CURTAIN ON A TUBULAR SURFACE,
Abstract
Experiments were made to determine the efficiency of cold gas jets used for protecting duct walls from the heat transferred from a main gas stream. Cold air and air preheated to 55-100C were used as the hot and cold gases. The cold air was injected at 1-6 m/sec through a slit parallel to a corrugated wall consisting of ebonite cylinder sections. These sections were mounted on a panel and placed in the 150-mm-wide rectangular test section. Velocity and temperature profiles were measured at the inlet and in various cross sections of the test section. The data were correlated in terms of the main gas flow viscosity, wall temperature, Reynolds number, and distance from the inlet. The efficiencies of cold gas jets for protecting smooth and corrugated walls are compared. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 1968
- Accession Number
- AD0686231
Entities
People
- E. P. Volchkov
- V. Ya. Levchenko
Organizations
- National Air and Space Intelligence Center