近临界压力区临界热流密度的流体模化  

Fluid to Fluid Modeling of Critical Heat Flux at Near Critical Pressures

作　　者：王美霞[1] 韩吉田[1] 邵莉[1] 

机构地区：[1]山东大学能源与动力工程学院,山东省济南市250061

出　　处：《中国电机工程学报》2011年第20期95-99,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51076084);国家教育部高等学校博士学科点专项科研基金项目(20090131110035)~~

摘　　要：为了扩大现有的临界热流密度(critical heat flux,CHF)流体模化技术的适用范围,提高其预测精度,以制冷剂R134a为介质,对近临界压力区的流动沸腾CHF进行流体模化研究。研究了压力对流动沸腾CHF的影响规律,结果表明,CHF随着压力的升高而降低。基于Ahmad补偿失真模型,在流速模化因子和入口条件模化因子的基础上,引入压力模化因子,对经典流体模化模型进行改进。将CHF查询表的模化结果与R134a流动沸腾CHF实验数据进行比较,结果吻合较好。改进的模化模型适用于近临界压力区,计算结果精度较高,计算也较简单。Fluid to fluid modeling of critical heat flux （CHF） at near critical pressures was studied with R134a as the working fluid in order to extend predication precision and applicable range of the modeling. The influence of pressure on CHF was studied, and the results indicate considerably CHF decrease with increasing pressure. Based on the Ahmad compensated distortion model, the pressure factor was introduced to improve the modeling. It is shown that the agreement is good between the look up table （LUT） modeling results and the experimental data. This model is applicable for CHF over a wide range of parameter, and using it can lead to much less amount of calculation and high accuracy.

关 键 词：临界热流密度 R134A 查询表 流体模化 临界 压力 

分 类 号：TK121[动力工程及工程热物理—工程热物理]