Special-shaped mixing holes for adjusting the temperature distribution at the outlet of the combustion chamber

Abstract

The invention discloses a special-shaped mixing hole for adjusting the outlet temperature distribution of a combustion chamber, which belongs to the field of gas turbine combustion; the invention is provided with special-shaped mixing holes on the inner and outer ring walls of the combustion chamber flame tube respectively; the special-shaped mixing hole will The wall surface of the flame tube is divided into the front section of the flame tube and the rear section of the flame tube; the special-shaped mixing holes are evenly distributed along the circumferential direction of the wall surface of the flame tube to form a uniformly distributed mixing jet in the circumferential direction and increase the penetration depth of the mixing air flow. Increase the contact area between the blended cold air and the high-temperature mainstream gas, improve the blending effect, and improve the temperature distribution quality of the combustion chamber outlet; by changing the jet penetration depth of the blending hole, the jet circumferential expansion angle and the jet direction, the combustion chamber can be adjusted The effect of outlet temperature distribution; by adjusting the outlet temperature distribution of the combustion chamber, the quality of the turbine inlet temperature is improved, thereby increasing the service life of the turbine and reducing the design difficulty of turbine heat protection.

Description

technical field [0001] The invention belongs to the field of gas turbine combustion, and relates to a heterogeneous mixing hole for adjusting the outlet temperature distribution of a combustion chamber, in particular to a heterogeneous mixing hole structure for adjusting the temperature distribution of the combustion chamber outlet. Background technique [0002] The gas turbine combustor is one of the core components of the gas turbine. The current development trends of the combustor are as follows: first, in order to reduce pollution emissions, the combustor is developed towards low pollution; second, in order to improve the thrust-to-weight ratio of the gas turbine, the combustor is developed towards high temperature and high pressure ratio. The high temperature rise / low pollution emission requirements of the combustion chamber greatly increase the demand for air intake at the head of the combustion chamber, so the flow area of ​​the swirler is increased and the main combu...

AI Technical Summary

Problems solved by technology

In the high-temperature rise / low-emission combustion chamber, the flow distribution of the mixed gas is limited, and the penetration depth of the conventional circular hole jet is not enough, and the mixing is not sufficient, resulting in an unreasonable distribution of the temperature at the outlet of the combustion chamber, which will lead to repeated discharges on a certain radius of the turbine. Sustained high temperature resulting in turbine guide / bucket ablation

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