内螺纹管和光管两相流不稳定性试验对比研究

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基金项目:

国家自然科学基金项目(50323001)；空泡物理和自然循环国家重点实验室基金项目(51482090101JW0806)

Comparative Research on Steam-Water Two-Phase Flow Instabilities between Internally Ribbed Tubes and Smooth Tubes

1. National Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, 710049, China;
2. National Key Laboratory of Bubble Physics & Natural Circulation, NPIC, Chengdu, 610041, hina

摘要: 在高压试验台上进行了倾斜并联内螺纹管和光管内汽-液两相流不稳定性试验,在此基础上对两种管型进行了对比研究,探讨了两种管型下各种参数对流动不稳定性的影响。对比研究表明,发生压力降型脉动时,光管的界限热负荷小于内螺纹管;发生密度波型脉动时,内螺纹管的界限热负荷小于光管。通过对试验数据进行最小二乘法回归,给出了两种管型内发生不稳定性的界限热负荷无因次方程。
- 内螺纹管 /
- 光管 /
- 不稳定性 /
- 汽-液两相流
Abstract: This paper compared the effects of two types of tubes, the internally ribbed tubes and the smooth tubes, on the two-phase flow instabilities in parallel inclined tubes based on the experimental investi- gation in high pressure test loops. Experimental results showed that the system parameters had important ef- fects on the two-phase flow instabilities both in the two types of tubes. The thresholds of heat flux of pressure drop oscillation in smooth tubes are smaller than that in the internally ribbed tubes; otherwise, the thresholds of density wave oscillation in internally ribbed tubes are smaller than that in the smooth tubes. Non-dimensional correlations of thresholds of heat flux both in the internally ribbed and the smooth tubes had been provided through the regression calculation of test data.
- Internally ribbed tubes /
- Smooth tubes /
- Instability /
- Two-phase flow