中文摘要：

本文采用Navier-Stokes方程和标准κ-ε两方程，对分体空调室内机（包括换热器和横流风机）整体系统，以水蒸汽和干空气两种气体为介质，进行了等温流动和实际工况流动的双流体三维数值模拟和研究。两种气体在叶轮的进口面上不均匀分布，叶轮轴向的压强和速度分布存在强度和位置的差异。采用密度干扰方法对水蒸汽的凝结参数近似处理，给出了水蒸汽体积分数和湍流强度在换热器域的分布、混合物温度分布等内流特性。与实验结果相比，双流体模拟的工作点外特性匹配较好。同时，对蜗舌间隙参数变化对性能的影响做了说明。

英文摘要：

Adopted Navier-Stokes equation and standardized k-eequations, aimed at the indoor splittype air conditioner composed with cross-flow fan and heat exchanger, the paper has systematically been carried on three-dimension numerical simulation and research at isothermal flow condition and summer operating condition with the mixture which is composed with dry air and vapor. The distribution of the two kinds of gas is not uniform and the import of the fan. Along the axial direction, the pressure and the velocity is different in intensity and place aspects. Adopted the density interfering method to deal with the condensation parameter of vapor approximately, distributing regulation of the vapor volume fraction and turbulence intensity in heat exchanger domain, the mixture temperature and other inner flow characteristic parameters are gained and discussed. Comparing with the experiment result, the external characteristic of the two-fluid simulation at operating point matches better. Meanwhile, the performance change caused by clearance of the volute tongue is analyzed.