Small-size precombustion chamber for engine

A pre-combustion chamber and engine technology, applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of large size of combustion chamber, troublesome installation, failure to meet assembly requirements, etc., and achieve small size, easy installation, good fuel consumption, etc. The effect of atomization and stabilization of the low-velocity ignition zone

Inactive Publication Date: 2012-06-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no matter which structure the size of the combustion chamber is relatively large, the length is more than 200mm, and the installation is more tro

Method used

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  • Small-size precombustion chamber for engine
  • Small-size precombustion chamber for engine
  • Small-size precombustion chamber for engine

Examples

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Comparison scheme
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Example Embodiment

[0027] Example 1

[0028] Such as figure 1 , figure 2 with image 3 As shown, a small pre-combustion chamber of an engine includes: a pre-combustion chamber body 1, a primary swirler 2, a secondary swirler 3, a fuel injection rod 4, and an ignition circuit installed in the pre-combustion chamber body 1 Nozzle 5. The ignition electric nozzle 5 is vertically installed on the center line of the first-stage cyclone 1 and the second-stage cyclone 2, and the fuel injection rod 4 is inserted into the oil inlet channel connected with the first-stage cyclone 2. Inside, the first-stage cyclone 2 includes a volute 2-1, a swirling blade 2-2, and a throat of a flow channel is provided at the outlet of the swirling blade 2-2, and the second-stage swirler 3 includes a shell 3-1, a swirling blade 3-2, a venturi 3-3, a throat with a flow channel is provided at the outlet of the swirling blade 3-2, and the first-stage swirler 2 The swirling blades 2-2 and the swirling blades 3-2 on the secondar...

Example Embodiment

[0032] Example 2

[0033] 1. Detection of the internal flow characteristics of the small engine pre-chamber provided by the present invention: using commercial computational fluid dynamics software fluent6.3, a full three-dimensional numerical simulation of the pre-chamber was performed using Ke turbulence model and SIMPLE algorithm, and the discrete parameters of each parameter Both adopt the second-order upwind style, and the standard of solution convergence is that the residual of the continuous equation satisfies no more than 10 -6 ; The inlet is set as the pressure boundary condition (gauge pressure 15000pa), and the outlet is set as the free boundary, which is the ambient pressure. The test results show that under the action of the rotating air flow, a pair of recirculation zones are formed near the ignition point until the exit of the flame-stabilizing cap cover. Figure 4 As shown, the formed recirculation zone is not easily affected by changes in upstream airflow, making t...

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Abstract

The invention discloses a small-size precombustion chamber for an engine. The small-size precombustion chamber for the engine comprises a precombustion chamber body (1), wherein a primary cyclone (2), a secondary cyclone (3), an oil spray rod (4) and an ignition electric nozzle (5) are arranged in the precombustion chamber body (1), the ignition electric nozzle (5) is vertically arranged on the center line of the primary cyclone (1) and the secondary cyclone (2), the oil spray rod (4) is inserted into an oil inlet passage communicated with the primary cyclone (2), the primary cyclone (2) comprises a worm case (2-1) and a cyclone blade (2-2), the secondary cyclone (3) comprises a worm case (3-1), a cyclone blade (3-2) and a Venturi pipe (3-3), and the rotating directions of the cyclone blade (2-2) and the cyclone blade (3-2) are opposite. The small-size precombustion chamber for the engine provided by the invention has the advantages that a good fuel oil atomization and stable low-speed ignition region can be provided, the structure of the whole precombustion chamber is compact, the dimension is small, the successful ignition can be realized in a wide stream Mach number range, and the application range is wide.

Description

[0001] technical field [0002] The invention relates to an ignition device for a combustion chamber, in particular a small pre-combustion chamber for ignition of engine combustion chambers such as the main combustion chamber and the afterburner combustion chamber of an aero-engine which requires high ignition performance. Background technique [0003] Ignition reliability is one of the main indicators of engine combustion chamber performance. There are two ignition methods, namely direct ignition and indirect ignition. Electric spark ignition is commonly used for direct ignition, and pre-combustion chamber ignition is often used for indirect ignition. The main advantage of pre-chamber ignition is that the torch has a large energy, but the existing pre-chamber ignition system has a complex structure, large size, heavy weight, and inconvenient installation. [0004] At present, aero-engines in western countries basically use direct ignition, while aero-engines in the former ...

Claims

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Application Information

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IPC IPC(8): F23R3/58
Inventor 宫继双范育新程晓军齐海帆高超张靖周王家骅
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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