【作者】 尹斌； 丁国良； 韦英奇；

【Author】 YIN Bin~1 DING Guo-liang~2 WEI Ying-qi~1 (1.Guangzhou Zhongyu Air Conditioning Technology Development Co.,Ltd,Guangzhou 510935;China; 2.Shanghai Jiaotong University,Shanghai 200240,China)

【机构】 广州中宇冷气科技发展有限公司； 上海交通大学；

【摘要】 对毛细管进行数值模拟,必须计算流过毛细管的制冷剂的物性,以确定两相区干度、比容和壅塞临界流量等参数。在本文中,对毛细管模型进行了简化,避免了对制冷剂物性的计算,从而提出了由流量确定毛细管长度及已知长度确定通过毛细管流量的数值方法。采用这两种方法对影响毛细管特性的主要因素进行了分析。将流量的模拟结果与试验值比较,发现模拟值高于试验值,其相对误差在10%以内。因此该简化计算方法在工程上应用是可行的。更多还原

【Abstract】 In simulation of capillary tube,the thermal-dynamic characteristics of refrigerant flowing through capillary tube must be calculated in order to determine several parameters such as two-phase refrigerant’s mass quality,specific volume and choked mass flow rate etc.In this paper,a simplified capillary tube model is present,which can be used to calculate the mass flow rate and the length of capillary tube while the calculation of refrigerant thermal-dynamic characteristics can be avoided.Comparison between simulation result of mass flow rate and experimental data shows that the simulation value is higher than experimental val- ue by less than 10%.Therefore,the simplified calculation model is applicable in engineering.更多还原