This paper focuses on the numerical simulation of the flow status in the compressor with the condition of fouling. NASA stage 35 was considered as the object, and the commercial code ANSYS CFX was used. The deposition rate of contaminants on the surface was considered to be different along the height of the blade. A data from related study shows that the deposition rate of the contaminant on the side close to the hub is higher than the side near the shroud part. Based on the deposition law, this paper simulated the fouling of the compressor blades by changing the thickness on the blade surface. This subject only changed the thickness of the stator blade surface because of a data showing that the fouling on the stator blade surface is almost double that on the rotor blade surface. In the condition that the roughness value of the blade surface is constant, only the stable working range of the compressor is effected by the change of the surface thickness of the stator blade. There is a positive relationship between the value of compressor minimum flow rate and the value of thickness increment. After fouling the total pressure ratio and isentropic efficiency degenerated 1.59% and 3.76%, respectively.

本文重点研究了结垢情况下压缩机内流动状态的数值模拟。NASA stage 35被视为对象，使用商业代码ANSYS CFX。污染物在表面上的沉积速率被认为沿着叶片的高度是不同的。相关研究的数据表明，靠近轮毂一侧的污染物沉积率高于靠近护罩部分的一侧。基于沉积规律，本文通过改变叶片表面的厚度来模拟压气机叶片的积垢。由于数据显示定子叶片表面的污垢几乎是转子叶片表面的两倍，因此该对象仅改变了定子叶片表面的厚度。在叶片表面粗糙度值不变的情况下，静叶表面厚度的变化仅影响压气机的稳定工作范围。压缩机最小流量值与厚度增量值之间存在正相关关系。污染后总压力比和等熵效率分别下降 1.59% 和 3.76%。