Turbine experiment device capable of quickly replacing test and measurement blade grids

Abstract

A turbine experiment device capable of rapidly replacing test and measurement blade grids comprises a front side plate and a rear side plate which are parallel and spaced by a certain distance, round holes are formed in the front side plate and the rear side plate, a front side rotatable disc and a rear side rotatable disc are installed in the two round holes respectively, and observation window glass is installed on the front side rotatable disc. An upper test blade grid and a lower test blade grid are respectively installed on the upper portion and the lower portion of a groove formed in the rear side disc, and a central measurement blade grid is installed in the middle of the groove formed in the rear side disc and can be taken out from the rear side of the rear side disc. According to the invention, the purposes of economically and quickly replacing the test blade grids and the measurement blade grid, adjusting the inlet airflow angles of the test blade grids and adjusting the measurement and observation range of the measurement blade grid can be realized, so that test and measurement of different types of test blade grids, test blade grids with different cooling structures and blade grids with different inlet airflow angles can be conveniently carried out, and support is provided for improving the cooling effect of a hot end component of a gas turbine and preventing the hot end component from being subjected to thermal stress damage.

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 experimental device capable of quickly replacing test and measurement blade cascades. Background technique [0002] Due to its high power density and wide power range, gas turbines are widely used in industrial fields such as aviation propulsion, energy conversion, and power generation. Improving the thermal efficiency of gas turbines is of great significance for creating an energy-saving and emission-reducing society and achieving sustainable development of the national economy. According to the gas turbine Brayton cycle, increasing the gas turbine inlet temperature can directly improve the thermal efficiency of the gas turbine operation. However, the increase in the inlet temperature of the gas turbine will also cause the hot-end components of the gas turbine (mainly including the first-stage guide vane and movin...

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Problems solved by technology

[0003] At present, in domestic and foreign test benches for research on heat transfer and cooling of hot-end components of gas turbines, the experimental section is only designed for a specific test cascade, or the process of replacing the test cascade in the experimental section is very complicated and cumbersome, and even the experimental section needs to be disassembled The main structure cannot economically and conveniently carry out experimental measurements on various test cascades

In addition, the existing gas turbine test bench can only conduct measurement tests on the guide vane or moving vane, and cannot meet the requirements of the inlet airflow angle of the guide vane and moving vane test cascade at the same time, and cannot systematically carry out the gas turbine hot end blade and moving blade) flow and heat transfer characteristics

In addition, the position of the observation window in the experimental section of the current gas turbine test bench is relatively fixed, and it can only measure the wall surface temperature and observe the wall surface flow within a fixed range, but cannot measure and observe the temperature and flow of the entire test cascade wall surface

At present, there is no experimental device that can replace the test cascade economically and conveniently, so as to conduct experimental measurements of various test cascades

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