Turbine experiment device with adjustable distance

Abstract

The invention discloses a distance-adjustable turbine experimental device which comprises an experimental section, the experimental section comprises two parallel side plates with a certain distance, the tops and sides of the two side plates are closed, a distance-adjustable device is installed above the other sides of the two side plates, outlets of the experimental section are formed below the other sides of the two side plates and in the bottoms of the two side plates, and a test blade grid is installed between the two side plates. An outlet of the compressor is connected with an inlet of the distance-adjustable device through a pipeline, an outlet of the distance-adjustable device faces the test blade grid, the distance-adjustable device comprises a necking-down pipe and an adjusting pipe in the airflow direction, the necking-down pipe is located at the inlet, the necking-down angle of the necking-down pipe is adjustable, one end of the adjusting pipe is connected with the necking-down pipe, and the other end faces the test blade grid. The inlet through-flow area and airflow radial velocity distribution of the turbine experiment table experiment section can be economically and conveniently adjusted, and the test measurement requirements of different types of blade grids (guide vanes and movable vanes), different pitches of blade grids and different inlet airflow angles are met.

Description

technical field [0001] The invention belongs to the technical field of gas turbine aerodynamic heat transfer and comprehensive cooling, in particular to a turbine experiment device with adjustable pitch. Background technique [0002] Gas turbine is one of the main thermal power conversion equipment in the field of turbomachinery. Improving its thermal power conversion efficiency is of great significance for improving energy conversion efficiency and overall productivity. In order to improve the thermal efficiency of gas turbines, the inlet temperature of gas turbines continues to increase, far exceeding the melting point (1000°C) of current turbine blade materials (single crystal nickel-based alloys). As society pays more and more attention to environmental protection, the outlet temperature of the environment-friendly combustor is more evenly distributed in the radial direction, which further increases the heat load on the end wall of the gas turbine cascade. Therefore, in...

AI Technical Summary

Problems solved by technology

[0003] At present, gas turbine test benches for mechanistic research at home and abroad can only conduct measurement tests on a certain fixed-pitch cascade after the construction is completed. If you want to replace the cascade with a different pitch for measurement experiments, you must redesign and Replacing the air section to adapt to the new pitch cascade will undoubtedly significantly increase the time cost and test economic cost

In addition, the existing gas turbine test bench can only measure and test the guide vane or moving blade, and cannot meet the air intake requirements of the guide vane and moving blade cascade channels at the same time, as well as tests with different pitches of the guide vane and moving blade cascade The research on the flow and heat transfer characteristics of gas turbine hot end components (guide vanes and moving vanes) cannot be carried out systematically

At present, there is no experimental device that can economically and conveniently adjust the inlet flow area of ​​the test section of the gas turbine test bench to meet the test and measurement requirements of different pitch cascades, guide vanes and moving vanes

Images