Abstract: In order to study the effect of turbine guide vane position on gas ingestion, the reduced-order model for predicting the sealing efficiency of the turbine disk cavity is optimized.Numerical simulation method and regression analysis are used to analyze the variation law of the pressure field in the annulus at different positions of the guide vanes. Based on the calculated data and literature experimental data, the parameters related to the flow state of the annulus in the prediction model are optimized. The results show that there is a positive linear relationship between the control parameters of the annulus Reynolds number and the relative position of the guide vane and the rim seal in the model.

Key words: gas ingestion, reduced order model, guide vane position, regression analysis