Preliminary Measurements of Heat Flux in a Subsonic Gun Simulator.
Abstract
Preliminary measurements of heat flux have been obtained in a subsonic gun simulator with thin film resistance thermometry for an inert, single phase flow expanding behind a projectile from an initial pressure of 8 bars and resulting in an exit projectile velocity of 40 m/s. The results show that heat transfer measurements at locations swept by the projectile are possible using thin-film sensors set into the wall by 0.1 mm and that the heat flux at various axial locations decreases with time and increases with distance from the breech, The measured convection coefficients at locations swept by the projectile differ up to 50% from those evaluated with quasi-steady flow assumption from a correlation for turbulent boundary layer with zero pressure gradient starting at the breech, due to the neglect of pressure gradient as well as to the effect of projectile wake on the boundary layer development. Keywords: Great Britain.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1987
- Accession Number
- ADA191090
Entities
People
- A. F. Bicen
- J. H. Whitelaw
- Marie Schmidt
Organizations
- Imperial College London