Abstract
The density wave instability of a system with low pressure and low quality is studied by the time domain method, and two kinds of non-linear density wave oscillation are found. The mechanisms, characteristics and factors effected on these two oscillations have been analyzed. The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation. It becomes a constant amplitude oscillation if the system is approaching to the stable boundary, and the amplitude becomes larger along with the inlet subcooling increasing. If the system is far away from the stable boundary, a varying amplitude oscillation will be produced due to density oscillation coupling to compressible oscillation. 2. the action of feedback of nuclear power and void fraction on the wave oscillation is determined by time lagging phase of heat flux. In the case of 5 MW nuclear heating reactor this action intensifies instability. 3. By increasing the inertia of riser in the core outlet, the compressible density wave oscillation can be suppressed effectively and the system stability can be enhanced.
Baocheng, Xu;
Zuying, Gao
[1]
- Qinghua Univ., Beijing, BJ (China). Inst. of Nuclear Energy Technology
Citation Formats
Baocheng, Xu, and Zuying, Gao.
Study on non-linear characteristics of density wave oscillation for a low pressure and low quality system with natural circulation.
China: N. p.,
1992.
Web.
Baocheng, Xu, & Zuying, Gao.
Study on non-linear characteristics of density wave oscillation for a low pressure and low quality system with natural circulation.
China.
Baocheng, Xu, and Zuying, Gao.
1992.
"Study on non-linear characteristics of density wave oscillation for a low pressure and low quality system with natural circulation."
China.
@misc{etde_10145225,
title = {Study on non-linear characteristics of density wave oscillation for a low pressure and low quality system with natural circulation}
author = {Baocheng, Xu, and Zuying, Gao}
abstractNote = {The density wave instability of a system with low pressure and low quality is studied by the time domain method, and two kinds of non-linear density wave oscillation are found. The mechanisms, characteristics and factors effected on these two oscillations have been analyzed. The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation. It becomes a constant amplitude oscillation if the system is approaching to the stable boundary, and the amplitude becomes larger along with the inlet subcooling increasing. If the system is far away from the stable boundary, a varying amplitude oscillation will be produced due to density oscillation coupling to compressible oscillation. 2. the action of feedback of nuclear power and void fraction on the wave oscillation is determined by time lagging phase of heat flux. In the case of 5 MW nuclear heating reactor this action intensifies instability. 3. By increasing the inertia of riser in the core outlet, the compressible density wave oscillation can be suppressed effectively and the system stability can be enhanced.}
place = {China}
year = {1992}
month = {May}
}
title = {Study on non-linear characteristics of density wave oscillation for a low pressure and low quality system with natural circulation}
author = {Baocheng, Xu, and Zuying, Gao}
abstractNote = {The density wave instability of a system with low pressure and low quality is studied by the time domain method, and two kinds of non-linear density wave oscillation are found. The mechanisms, characteristics and factors effected on these two oscillations have been analyzed. The following conclusions are obtained: 1. the density wave in an unstable area develops a finite continuous oscillation. It becomes a constant amplitude oscillation if the system is approaching to the stable boundary, and the amplitude becomes larger along with the inlet subcooling increasing. If the system is far away from the stable boundary, a varying amplitude oscillation will be produced due to density oscillation coupling to compressible oscillation. 2. the action of feedback of nuclear power and void fraction on the wave oscillation is determined by time lagging phase of heat flux. In the case of 5 MW nuclear heating reactor this action intensifies instability. 3. By increasing the inertia of riser in the core outlet, the compressible density wave oscillation can be suppressed effectively and the system stability can be enhanced.}
place = {China}
year = {1992}
month = {May}
}