Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF4 Cites 8 Cited by
  • 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 troublesome, especially for aero-engines with small size requirements, the pre-combustion chamber of the prior art can not meet the assembly requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Small-size precombustion chamber for engine
  • Small-size precombustion chamber for engine
  • Small-size precombustion chamber for engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , figure 2 and image 3 Shown, a kind of small-sized pre-chamber of engine, it comprises: pre-chamber body 1, the primary swirler 2 installed in pre-chamber body 1, secondary swirler 3, fuel injection rod 4 and ignition electric Nozzle 5, the ignition nozzle 5 is vertically installed on the center line of the primary swirler 1 and the secondary swirler 2, and the fuel injection rod 4 is inserted into the oil inlet channel connected with the primary swirler 2 Inside, the first-stage cyclone 2 includes a volute 2-1, a swirl vane 2-2, and a throat of a flow channel is provided at the outlet of the swirl vane 2-2, and the second-stage cyclone 3 includes a housing 3-1, a swirl vane 3-2, a venturi tube 3-3, a throat with a flow channel at the outlet of the swirl vane 3-2, and the first-stage swirler 2 The rotation directions of the swirl blades 2-2 and the swirl blades 3-2 on the secondary swirler 3 are opposite.

[0029] The small-sized pre-chamber of ...

Embodiment 2

[0033] 1. The internal flow characteristic detection of the small-sized pre-combustion chamber of the engine provided by the present invention: using commercial computational fluid dynamics software fluent6.3, a full three-dimensional numerical simulation of the pre-combustion chamber is carried out. Using the K-e turbulence model and the SIMPLE algorithm, the discreteness of each parameter Both adopt the second-order upwind scheme, and the criterion for solution convergence is that the residual error of the continuous equation is not greater than 10 -6 ; The inlet is set as a pressure boundary condition (gauge pressure 15000pa), and the outlet is set as a free boundary, which is the ambient pressure. The numerical test results show that under the action of the rotating air flow, a pair of recirculation zones such as Figure 4 As shown, the formed recirculation zone is not easily affected by changes in the upstream air flow, making the pre-chamber ignition stable; and as Figu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com