Active airflow control adjustment device and engine combustion chamber including the same
A technology of airflow control and adjustment device, which is applied in the control of combustion, combustion chamber, continuous combustion chamber, etc., can solve problems such as lean oil flameout, and achieve the effects of reducing pollution emissions, reducing air volume, and simple structure
Active Publication Date: 2016-05-04
AECC COMML AIRCRAFT ENGINE CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to ensure the combustion stability of the combustion chamber under different working conditions, by providing an active airflow control adjustment device to adjust the flow distribution in the combustion chamber under different working conditions, and effectively solve the problem of lean fuel flameout under small working conditions question
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[0050] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
[0051] First, some terms in this technical field are introduced, among which:
[0052] Flow distribution: the ratio of the gas flow entering the flame tube and the inner and outer ring chambers in the combustion chamber.
[0053] Small working condition: the working condition in which the temperature, pressure and flow rate of the engine are lower than 30% of the full working condition.
[0054] Large working condition: when the temperature, pressure and flow of the engine are running higher than 80% of the full working condition.
[0055] Equivalence ratio: The ratio of the actual oil-gas ratio to the chemically correct oil-gas ratio.
[0056] Cyclone: A device that causes gas to generate tangential velocity for rotational flow.
[0057] see first figure 1, taking the engine combustion chamber as an example, the low-emission engine combustion cham...
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The invention belongs to the field of energy and power combustion devices, and provides an active air flow control and adjustment device, which comprises a plurality of execution mechanisms arranged along the circumferential direction of a combustion chamber, an annular transition section for integrating the plurality of execution mechanisms into a whole, and at least one driving mechanism for supporting and driving the annular transition section to move, wherein each execution mechanism comprises an outer pull rod, an inner pull rod, an outer turning plate connected between the outer pull rod and an outer cover hood and an inner turning plate connected between the inner pull rod and an inner cover hood; the annular transition section is driven to translate axially through axial expansion and contraction of the driving mechanism so as to further drive the inner and outer pull rods of the execution mechanism to move in the radial direction opposite to the axial direction, so that when the combustion chamber is in a small working condition, space between the inner and outer turning plate is contracted to reduce the amount of air entering into a flame tube, and when the combustion chamber is in a large working condition, the space between the inner and outer turning plates are enlarged to increase the amount of the air entering into the flame tube.
Description
technical field [0001] The invention belongs to the field of energy and power combustion devices, and relates to a combustion chamber of an aero-engine, in particular to a combustion chamber with an airflow regulating device. Background technique [0002] Civil aviation engine pollution emission standards are becoming increasingly stringent, and the currently adopted CAEP6 (Committeon Aviation Environmental Protection) standard has posed severe challenges to traditional engines. The latest CAEP8 standard proposes to reduce NOx emissions by 15% compared with the CAEP6 emission standard. With the rapid development of the aviation industry and the continuous improvement of people's environmental protection awareness, higher requirements will be put forward for the pollution emissions of gas turbine combustors in the future. [0003] A new generation of low-pollution combustors is represented by the GEnx engine of GE's TAPS combustor using LPP (Lean Premixed Prevaporized) techno...
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IPC IPC(8): F23N3/00F23R3/00
Inventor 陈苏涛徐晓天李彬
Owner AECC COMML AIRCRAFT ENGINE CO LTD