Due to the complex and harsh environmental factors, the useful life of the filter in the gas turbine air intake system is usually less than its design life. When the filter is seriously degraded, the power and thermal efficiency of the gas turbine will decrease obviously due to the increase of inlet pressure loss. For evaluating the health condition of filters in the air intake system, this work forms a filter pressure loss model with the defined health index for the filter and five external environmental and control factors. By integrating the gas path component model, the combined model is applied in a real data set and the results show that (i) the proposed health index is efficient in representing the degradation state of the filter, (ii) the influencing factors on the pressure loss are successfully decoupled and their contributions on the pressure are quantitatively estimated, and (iii) the integrated model of filter pressure loss and gas path component can be used to better estimate the deterioration states of the filter as well as the gas turbine performance.

由于复杂和恶劣的环境因素，燃气轮机进气系统中过滤器的使用寿命通常小于其设计寿命。当过滤器严重退化时，燃气轮机的功率和热效率会因进口压力损失的增加而明显下降。为了评估进气系统中过滤器的健康状况，这项工作形成了过滤器压力损失模型，其中定义了过滤器的健康指数和五个外部环境和控制因素。通过集成气路组件模型，将组合模型应用于实际数据集，结果表明（i）所提出的健康指数能够有效地表示过滤器的退化状态，