Method for acquiring low-pressure turbine performance test inlet stagnation pressure

The invention provides a method for acquiring stagnation pressure of a low-pressure turbine performance test inlet. The method comprises the steps of S1, acquiring a loss characteristic line of a flowguide support plate; S2, measuring state parameters of the low-pressure turbine guider circular blowing and stage performance test, wherein the loss of the flow guide support plate is taken into account; and S3, calculating the guide vane inlet stagnation pressure, namely, the low-pressure turbine performance test inlet stagnation pressure according to the state parameters obtained in the S2 andthe loss characteristic line obtained in the S1. According to the method for obtaining the low-pressure turbine performance test inlet stagnation pressure, in the test of obtaining the annular blowingloss characteristic and the stage performance efficiency characteristic of a low-pressure turbine guider, due to the fact that a test probe between the flow guide supporting plate and the guide bladeis removed, the influence o