Modeling experiment device for heat transfer in moving blade of aviation gas turbine

Abstract

The invention discloses a modeling experiment device for heat transfer in a moving blade of an aviation gas turbine. The modeling experiment device comprises an experiment rack, a rotating shaft, a compression chamber, a motor, a wireless transmission module and an experiment segment and a test assembly arranged in the compression chamber; the rotating shaft is vertically installed on the experiment rack and connected to the motor; the compression chamber is connected to the rotating shaft and can rotate around the rotating shaft; the experiment segment comprises a cooling channel which is communicated with an external air feed device, and the test assembly is used to obtain test data of the experiment segment; and the wireless transmission module is connected with the test assembly and used to control the test assembly and transmit the test data. Under the condition that characteristic criteria of cooling rotation in the moving blade of the aviation gas turbine are satisfied, the modeling experiment device can obtain heat transfer property data of the wall surface of an internal cooling channel of the experiment segment, and provide significant basic data for fine design of the moving blade of the aviation gas turbine.

Description

technical field [0001] The invention belongs to the technical field of measuring devices, and in particular relates to a modeling experiment device for internal heat transfer of aviation gas turbine blades. Background technique [0002] Cooling of turbine blades plays a pivotal role in the efficiency and thrust of gas turbines and aero engines. For gas turbines and aero engines currently in operation, the gas temperature at the inlet of the turbine is much higher than the allowable temperature of the blade superalloy, so the blade needs to be cooled to ensure its safe and stable operation. Internal cooling is one of the important ways to reduce the temperature of turbine blades. Cooling air with lower temperature flows through the serpentine channels inside the hollow blades to remove heat by convection heat transfer. The working blades of the turbine are in a state of high-speed rotation, and the centrifugal force and rotational buoyancy caused by the rotation have a very ...

AI Technical Summary

Problems solved by technology

This structure can use visual measurement means (such as temperature-sensitive liquid crystal, infrared thermal imager, etc.) to measure the convective heat transfer characteristics of the inner cooling channel of the turbine blade, so as to provide a detailed distribution of heat transfer coefficient, but the measurement range of a single experiment is limited. Th

Images