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Design method of venturi flow channel of double-swirl atomizing device

A technology of an atomization device and a design method, which is applied in the field of fuel nozzle design, can solve the problems of poor fuel atomization quality, no modeling method, and lack of thermal protection for fuel nozzles.

Active Publication Date: 2019-01-18
TIANJIN CHENGLI AVIATION TECH CO LTD
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Problems solved by technology

As a result, due to the unreasonable determination of the throat size and position of the venturi tube in the combustion chamber, the quality of fuel atomization will be poor and the fuel nozzle will not be effectively protected by heat, resulting in failures such as carbon deposition and ablation. At present, there is no design basis for the surface modeling in the venturi tube, and no optimal modeling method has been proposed, so there is randomness in the design, which lacks guarantee for the spray quality of the double swirl atomizer

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  • Design method of venturi flow channel of double-swirl atomizing device
  • Design method of venturi flow channel of double-swirl atomizing device
  • Design method of venturi flow channel of double-swirl atomizing device

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Embodiment Construction

[0045] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0046] A method for designing a venturi flow path of a double swirl atomization device, the design of the venturi flow path includes the diameter of the venturi throat cross section, the axial position of the venturi throat cross section and the The design of Venturi tube flow channel profile molding, the design method of described Venturi tube flow channel comprises the following steps:

[0047] (1) Collect the inlet airflow parameters of the combustor in the design state of the combustor, including air pressure, temperature and flow, and the ratio of the primary flow that flows through the air intake device at the head of a single flame tube obtained in the calculation of the flow distribution of the flame tube, according to the following formula Calculate the air flow through the double swirl atomizer,

[0048] W i0 =F 1 *Wa / (Ff0 *i),

[0049] In th...

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Abstract

The invention provides a design method of a venturi flow channel of a double-swirl atomizing device, which comprises the following steps of: (1) calculating the air flow passing through the double-swirl atomizing device; (2) calculating the flow WIN of a primary swirler according to that the flow WIN of the primary swirler of the double-swirl atomizing device is equal to the air flow WO passing through the venturi; (3) calculating a throat diameter d0 of the venturi according to the principle that the air flow Mach number of the venturi throat section is 0.1; (4) determining an axial positiondimension L0 of the venturi throat,(5) determining an inlet dimension d1 of the venturi flow channel and an outlet dimension d2 of the venturi flow channel; (6) determining the profile modeling of theventuri flow channel. According to the invention, the design method is an important part in the design of the double-swirl atomizing device, ensures the spray quality of the atomizing device and theeffective thermal protection of a fuel nozzle, and provides a basis for the design work in the future.

Description

technical field [0001] The invention relates to the technical field of fuel nozzle design, in particular to a design method of a venturi flow channel of a double swirl atomization device. Background technique [0002] The double-swirl atomizing device realizes the integrated design of the fuel nozzle and the air inlet device at the head of the flame tube, making the structure very compact. Because the device has the ability of strong atomization and the advantage of shortening the flame, it lays the foundation for shortening the length of the flame tube and reducing the oil supply pressure. Therefore, the device is widely used in modern combustion chambers. In addition, the double-swirl atomizing device is also the technical basis of the three-swirl atomizing device used in the high-temperature rise combustion chamber and the low-pollution combustion chamber. Therefore, it is very meaningful to establish the design method of double swirl atomization device. The method of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28
CPCF23R3/28
Inventor 尚明智陈立赵选峰彭建科孔祥东徐国奇
Owner TIANJIN CHENGLI AVIATION TECH CO LTD
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