Marine gas turbine inlet icing process observation test bed

Abstract

The invention aims to provide a marine gas turbine inlet icing process observation test bed, which comprises a suction section box body, a mixing section box body, a test section box body, a marine gas turbine inlet scaling model and an inertia stage separator, wherein the mixing section box body is positioned between the suction section box body and the test section box body; an outlet of the suction section box body is connected with an inlet of the mixing section box body; the inertia stage separator and the marine gas turbine inlet scaling model are installed in the test section box body;a liquid nozzle and a solid nozzle are arranged in the suction section box body; and a centrifugal fan is connected with the test section box body through an inlet wire mesh filter. According to the method, the working environment of a marine gas turbine under the real extremely cold sea condition can be simulated, the marine gas turbine inlet icing rule is obtained, meanwhile, the marine gas turbine inlet icing condition can be controlled by changing parameter values influencing icing factors, numerical simulation results are compared and analyzed, and the research on the marine gas turbine inlet icing mechanism is carried out.

Description

technical field [0001] The invention relates to a test bench, specifically a gas turbine observation test bench. Background technique [0002] With the rapid development of my country's shipbuilding industry, gas turbines have gradually become the main power equipment of my country's ships by virtue of their advantages such as large unit power, strong maneuverability, and low noise frequency. At the same time, with the continuous expansion of the ship's navigation area, the operating environment of the ship's gas turbine is even worse. In the state of starting and accelerating, due to the high speed of the gas turbine and the high flow rate of the inlet air flow, the air expands, the pressure drops, and the temperature degrades, which will also cause the inlet of the marine gas turbine to freeze. [0003] The icing at the inlet of the marine gas turbine will have a great impact on the normal operation of the complete marine gas turbine. The main impacts are as follows: [...

AI Technical Summary

Problems solved by technology

[0004] (1) Icing at the inlet of the marine gas turbine will cause the deterioration of the aerodynamic performance at the inlet, which will lead to distortion of the flow field at the inlet of the marine gas turbine, increase the unevenness, and local separation of the intake air flow, which may eventually lead to the instability of the compressor or even panting vibrate

[0005] (2) After the frozen ice layer at the inlet of the marine gas turbine falls off, it may enter the interior of the compressor with the air flow and damage the compressor blades, thereby causing mechanical damage to the compressor and even causing unexpected shutdown of the gas turbine;

[0006] (3) The structure of the ship’s air inlet will lead to the asymmetry of icing at the inlet of the marine gas turbine. This large amount of asymmetric ice accumulation will destroy the original balance of the whole machine, resulting in abnormal vibration of the marine gas turbine, and in severe cases, it will endanger the bearings. safe to use

However, there is still a gap in the research on the inlet icing of marine gas turbines with the participation of multiphase air

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