Abstract
Numerical simulations are performed to study the characteristics of thermo-acoustic oscillation of a gas confined in a loop-type pipe with the section of short and narrow channels. In order to simulate the irreversible heat exchange between the gas and the pipe wall, the compressible mass, momentum and energy conservation equations are solved in the loop pipe as well as the heat conduction equations in the pipe wall. Spontaneous oscillations are obtained when the temperature gradient along the narrow channel becomes large. It is found that the onset temperature of simulated thermo-acoustic oscillation agrees with that of the stability analysis and increases when the effect of gravity is not taken into account.
Highlights
Thermo-acoustic oscillation is induced when a gas is confined in a pipe with the section of short and narrow channels and the temperature gradient along the narrow channel is large
Numerical simulations are performed to study the characteristics of thermoacoustic oscillation for nuclear application
A honeycomb-shape flow section called stack, which is a bundle of narrow channels, is included in the loop pipe at the left bottom of a vertical section
Summary
Thermo-acoustic oscillation is induced when a gas is confined in a pipe with the section of short and narrow channels and the temperature gradient along the narrow channel is large. After the steady-state flow field in the gas and temperature field in the pipe wall are established, the heat transfer coefficient in the stack is increased to simulate large heat transfer in the narrow channel.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
