Damping criteria for thermal acoustic oscillations in slush and liquid hydrogen systems
Abstract
Thermal acoustic oscillations in cryogenic systems are generally highly undesirable since large amounts of heat can be transferred into these systems during such oscillations. Further, the vibrations in these systems due to thermal oscillations can cause measurement and even structural difficulties. Considerable effort has been devoted in developing techniques for damping such oscillations by attaching resonators, inserting wires, etc. A theoretical analysis of these damping techniques has recently been completed. In this study a number of the damping criteria were investigated. These damping criteria were developed by investigating the stability characteristics obtained in an earlier analysis. This study indicates that thermal acoustic oscillations can be damped effectively by a number of approaches such as changing the tube radius, adjusting the length ratio of the warm section to the cold section and varying the temperature ratio or temperature profile along the tube.
- Publication:
-
Cryogenics
- Pub Date:
- 1992
- DOI:
- 10.1016/0011-2275(92)90266-D
- Bibcode:
- 1992Cryo...32..194G
- Keywords:
-
- Cryogenics;
- Liquid Hydrogen;
- Oscillating Flow;
- Slush Hydrogen;
- Sound Waves;
- Vibration Damping;
- Radii;
- Temperature Distribution;
- Temperature Gradients;
- Temperature Ratio;
- Tubes;
- Engineering (General)