A marine three-shaft gas turbine based on rotating detonation combustion

Abstract

The invention provides a ship three-shaft gas turbine based on rotary detonation combustion. The ship three-shaft gas turbine comprises a low-pressure compressor, a high-pressure compressor, a rotary detonation combustion chamber, a thermojet detonation tube, a mixer, a low-pressure turbine body, a high-pressure turbine body, a power turbine body, a load and a cold source. The rotary detonation combustion chamber is applied to the ship gas turbine. The mode that air of the low-pressure compressor participates in combustion and air of the high-pressure compressor participates in mixing and cooling is adopted, the effect that a working medium at an inlet of the turbine does not exceed the temperature is ensured, and the working medium subjected to detonation combustion has higher working capacity. The supercharging performance of the rotary detonation combustion chamber is used, and the cycle thermal efficiency of the gas turbine is improved by 3% to 5% under the same turbine inlet temperature, part efficiency and compressor pressure ratio.

Description

technical field [0001] The invention relates to gas turbine technology, in particular to a marine three-shaft gas turbine based on rotating detonation combustion. Background technique [0002] The thermal efficiency of the gas turbine cycle is the most important performance index for evaluating the technical level of the gas turbine design, and reducing the entropy increase in the gas turbine cycle is an important way to improve the thermal efficiency of the gas turbine cycle. In the Brayton cycle, the isobaric combustion process is the thermodynamic process with the largest entropy increase. Reducing the entropy increase of this thermodynamic process is limited by the principle of isobaric combustion, which in turn limits the substantial increase in the efficiency of gas turbines based on the simple Brayton cycle. With the development of science and technology, the performance requirements of gas turbines are gradually improved, and the defects such as high pollutant emissi...

AI Technical Summary

Problems solved by technology

However, when the fuel-air equivalent of the rotating detonation combustor is relatively low, the combustion is unstable, and the explosion phenomenon is prone to occur, while when the fuel-air equivalent is relatively high, the outlet temperature of the combustion chamber is too high, which is unacceptable to the turbine blades. It becomes a key issue whether the rotating detonation combustor can be applied to the gas turbine

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