Two-dimensional features of strong shock waves in gases
Abstract
Strong shock waves around 10 km/sec are generated in low-density (13.3 Pa) air and nitrogen by using a free-piston double-diaphragm shock tube with a test section of 40 x 40 mm. Two-dimensional features of radiation intensity behind the shock waves are observed using an image converter camera and an image processor. The pseudocolor representation and the contour plot of radiation intensity clearly reveal various types of two-dimensional profiles. In addition to the regular type, two irregular types of oblique and two-step profile are observed. The time histories of radiation intensity derived from image processing and yield information about the radiative characteristics of the shocked air and nitrogen.
- Publication:
-
Current Topics in Shock Waves
- Pub Date:
- 1990
- Bibcode:
- 1990ctsw.proc..856I
- Keywords:
-
- Flow Visualization;
- Gas Flow;
- Image Processing;
- Shock Tubes;
- Shock Waves;
- Image Converters;
- Nitrogen;
- Radiation Distribution;
- Reentry Vehicles;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer