Effect of form and clearance of a piston launched in a tube on the boundary layer and the heat transfer
Abstract
Interior ballistic flows in front of and behind a piston launched in a tube were simulated in a shock tube. The boundary layers behind the piston are clearly visualized by differential interferograms. The ground form dependence of the heat flow in the measurement tube wall is smaller than the signal fluctuations. In the case of gas slippage the heat flow measurements show strong effects in front of the piston and in the gap between piston and wall. The flow pictures show no considerable effect of gas slippage on the boundary layer behind the piston, while strong flow effects are observed in front of the piston.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- June 1983
- Bibcode:
- 1983STIN...8524255S
- Keywords:
-
- Boundary Layers;
- Clearances;
- Heat Transfer;
- Pistons;
- Shapes;
- Differential Interferometry;
- Flow Visualization;
- Interior Ballistics;
- Shock Tubes;
- Streak Photography;
- Fluid Mechanics and Heat Transfer