根据环形管通道内流体流动和换热的特点,以Kirillov和Smogalev提出的干涸点理论模型假设为基础,从最基本的质量守恒方程出发,并引入临界液膜厚度等相应的辅助模型,得到了双面加热环形通道内流动沸腾干涸点的理论模型.同时针对间隙为1.0 mm和1.5 mm的环形窄缝进行了低压低质量流速工况下干涸点的实验研究.比较发现理论模型预测值与实验结果基本相符.说明本文提出的理论模型适用于低压低流量条件下的窄环形通道.实验同时发现:环状流临界热流密度在系统压力为2.2 MPa达到最大值,临界含汽量随质量流速的增大呈缓慢下降趋势.
参考文献
| [1] | David D. Hall;Issam Mudawar .Critical heat flux (CHF) for water flow in tubes -- I. compilation and assessment of world CHF data[J].International Journal of Heat and Mass Transfer,2000(14):2573-2604. |
| [2] | Kwang-Won Lee;Se-Jin Baik;Tae-Sun Ro .An utilization of liquid sublayer dryout mechanism in predicting critical heat flux under low pressure and low velocity conditions in round tubes[J].Nuclear engineering and design,2000(1/2):69-81. |
| [3] | Se-Young Chun;Heung-June Chung;Sang-Ki Moon .Effect of pressure on critical heat flux in uniformly heated vertical annulus under low flow conditions[J].Nuclear engineering and design,2001(2/3):159-174. |
| [4] | S Levy;J M Healzer;D Abdollahian .Prediction of Critical Heat Flux in Vertical Pipe Flow[J].Nuclear Engineering and Design,1981,65:131-140. |
| [5] | S Doerffer;D C Groeneveld;S C Cheng .A Comparison of Critical Heat Flux in Tubes and Bilaterally Heated Annuli[J].Nuclear Engineering and Design,1997,177:105-120. |
| [6] | Katto Y .Prediction of Critical Heat Flux for Annular Flow in Tubes Taking Into Account the Critical Liquid Film Thickness Concept[J].International Journal of Heat and Mass Transfer,1984,27:883-891. |
| [7] | Tippets F E .Critical Heat Fluxes and Flow Patterns in High Pressure Boiling Water Flows[R].ASME Winter Annular.Meet Paper 62-WA-162,Newe York,1962. |
| [8] | Tippets F E .Analysis of the Critical Heat Fluxes Conditions in High Pressure Boiling Water Flows[J].Journal of Heat Transfer,1964,86:23-38. |
| [9] | Knudsen J G;Katz D L.Fluid Dynamics and Heat Transfer[M].New York: McGraw-Hill,1958:186-187. |
| [10] | P Venkateswararao;R Semiat;A E Dukler .Flow Pattern Transition for Gas-liquid Flow in A Vertical Uniformly Heated Rod Bundle[J].International Journal of Multiphase Flow,1982,8:509-524. |
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