A Small Gas Turbine Based on Constant Volume Combustion
A gas turbine, constant volume combustion technology, applied in the direction of gas turbine devices, mechanical equipment, engine components, etc., can solve the problems of narrow stable area and easy flameout, and achieve the effects of low air velocity, high combustion efficiency, and increased mixing speed
Inactive Publication Date: 2016-11-30
HUANENG POWER INT INC +1
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Problems solved by technology
[0005] The purpose of the present invention is to further improve the cycle thermal efficiency of the existing ground gas turbine, solve the problems of narrow combustion stable area of the isobaric combustion chamber, easy flameout and frequent combustion adjustment, and provide a small gas turbine based on constant volume combustion
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[0056] figure 1 It is a diagram showing the overall configuration of a small gas turbine based on constant volume combustion according to this embodiment. Such as figure 1 As shown, the gas turbine involved in this embodiment includes a main power shaft 20 rotating around the rotating shaft, an air inlet 1, a centrifugal compressor 2, a constant volume combustion chamber 5, a radial turbine 7, a gas rectifying chamber 4, Axial flow turbine 14 and gas exhaust structure 15 are formed, and form as figure 1 The flow path of gas working fluid through them is indicated by the middle arrow.
[0057] Along the gas flow direction of the gas turbine, the air inlet 1 is located at the leftmost end of the gas turbine, and the centrifugal compressor 2 is designed on the right side of the air inlet 1. Considering that the constant volume combustion has the advantage of self-pressurization, the centrifugal compressor 2 is only used in this example A single-stage centrifugal compressor is ...
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The invention discloses a small gas turbine based on constant volume combustion. The small gas turbine comprises an intake way, a centrifugal compressor, a gas rectification chamber, a constant volume combustion chamber, a combustion chamber power input shaft, a combustion chamber driving motor, an axial flow turbine, a gas exhaust structure, a transmission II, a generator II, a main power shaft and the like. After a rotary constant volume supercharge combustion chamber is adopted to replace a traditional constant pressure combustion chamber, the gas turbine gas reduce the series and the compression work of the compressor, so that the power generation proportion in the power of a turbine output shaft is increased, and the circulating heat efficiency of the gas turbine is wholly improved; and as the constant volume combustion is performed in a closed volume, the airflow speed in the combustion chamber is low, stable combustion flame is easily formed, fuels and air are not filled any more in the combustion process, the combustion instability problem caused by the air or fuel pressure / flow fluctuation is not generated, and such problems as narrowed combustion stabilization area of the combustion chamber and easy flameout due to the use of a low-pollution combustion technology in a traditional gas turbine can be successfully solved.
Description
Technical field: [0001] The invention relates to a gas turbine, in particular to a small gas turbine that releases fuel heat energy in a constant-volume combustion manner. Background technique: [0002] Isometric combustion and isobaric combustion are two common combustion methods, both of which belong to slow-burning combustion. Isometric combustion keeps the volume constant during the combustion process, while pressure and temperature rise simultaneously, while isobaric combustion means that the pressure remains constant and the temperature increase, volume expansion. Isometric combustion is mainly used in reciprocating piston internal combustion engines, which have the advantages of small size and high cycle thermal efficiency. Isobaric combustion is mainly used in ground, ship, aviation and industrial gas turbines. It has the characteristics of light unit weight and high specific power, but compared with reciprocating piston internal combustion engines, its cycle therma...
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IPC IPC(8): F02C5/02F02C7/224
Inventor 李晓丰肖俊峰王玮王峰
Owner HUANENG POWER INT INC