200MW核供热堆两相流密度波不稳定性实验的Shannon信息熵特性研究

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基金项目:

国家重点科技攻关项目——200MW低温核供热堆(NHR-200)

Shannon Entropy Characteristics of Two-phase Flow Density Wave Instability Experiments for 200MW Nuclear Heating Reactor

Institute of Nuclear Energy Technology, Tsinghua University, Beijing, 100084, China

摘要: 在200MW核供热堆热工实验台架上,利用信息论原理,研究两相流密度波不稳定性的Shannon信息熵特性。通过调节加热功率、运行压力和冷却剂入口过冷度,获得534种工况下加热流道入口压降的实验数据。计算不同工况下的Shannon信息熵,发现具有高的负Shannon信息熵(负熵)的实验工况是不稳定的,而具有低的负熵的实验工况是稳定的。负Shannon信息熵类似很多场合中使用的能量,可以成为衡量系统稳定性的尺度。
- 两相流 /
- 稳定性 /
- 信息熵
Abstract: Based on the information theory, the Shannon entropy characteristics of two-phase flow density wave instability has been studied on the research platform of Chinese 200MW nuclear heating reactor. Experimental data for the inlet pressure drop in the heating channel under 534 different conditions has been obtained by adjusting the heating power, inlet subcooling, operating pressure and other parameters. We find that tests with higher negative Shannon entropy （negentropy） are instable while those with lower negentropy are stable. Like energy used in many other fields, negentropy can be a factor to measure the system stability.
- Two-phase Flow /
- Stability /
- Shannon Entropy