Unlock instant, AI-driven research and patent intelligence for your innovation.

Damper for reducing sonic wave amplitude of burner

A technology of damping device and sound wave amplitude, which is applied in the direction of burner, burner, burner noise control, etc.

Inactive Publication Date: 2004-05-26
阿尔斯通(瑞士)有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the Helmholtz resonator is arranged adjacent to the actual burner in the so-called combustion chamber housing (Brennkämmerdom), so that although the amplitude of the sound waves can be damped on the one hand, the burner cannot be completely reduced in this way. Direct effect on sound wave generation

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
  • Damper for reducing sonic wave amplitude of burner
  • Damper for reducing sonic wave amplitude of burner
  • Damper for reducing sonic wave amplitude of burner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] FIG. 1 shows a very simplified schematic sectional view of a burner which is described in detail in EP 0 321 809 B1, for example.

[0026] Directly adjoining the combustion chamber 1 is a conical mixing zone 2 , the internal structure and mode of operation of which are not discussed here, for further details reference may be made to the aforementioned European patent documents. A Helmholtz resonator 4 , which is connected via an open volume to the mixing zone 2 and the combustion chamber 1 , is arranged directly on top of the conically shaped mixing zone 2 via a conduit 3 . The sound waves generated within the combustion chamber 1 and the mixing zone 2 can be damped in a targeted manner by means of a suitable Helmholtz resonator 4 tuned to the resonance properties of the burner. A reflection of the sound waves entering the interior of the Helmholtz resonator 4 from left to right in the burner shown in FIG. 1 is purposefully damped in this resonator and is no longer refl...

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

A damping device for reducing the vibration amplitude of acoustic waves and a burner for operating an internal combustion engine, the burner having a mixing region, in which an air flow and a fuel flow are mixed with one another to form an air / fuel mixture, and a combustion chamber, which in the direction of flow of the fuel / air mixture is arranged downstream of the mixing region, in which the fuel / air mixture can be ignited. A Helmholtz resonator directly connected to the mixing region of the burner such that acoustic waves formed in the burner are suppressed in the Helmholtz resonator and are not reflected back into the burner.

Description

technical field [0001] The invention relates to a damping device for reducing the acoustic amplitude of a burner. Background technique [0002] It is known that so-called combustion chamber fluctuations in the form of sound waves occur when fuel is combusted in a combustion chamber and are attempted to be suppressed purposefully by suitable structural measures, such combustion chambers being used, for example, in aircraft engines , or are used to drive combustors in thermal power plants, especially in gas turbine equipment. For example, in afterburner systems of aircraft engines, so-called hinderspuelte perforated plates are used as wall plates, which serve both to cool the walls and to suppress unwanted sound waves. [0003] Such post-cleaning orifice plates are also used in conventional gas turbine combustion chambers, where they essentially perform the same task of cooling the combustion chamber walls and purposefully damping the acoustic vibrations that develop in the c...

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): F23R3/18F23D14/46F23D17/00F23M20/00F23R3/28
CPCF23R3/286F23D2210/00F05B2260/96F23D14/46F23R2900/00014F23C2900/07002
Inventor 马塞尔·斯塔尔德弗朗兹·约斯
Owner 阿尔斯通(瑞士)有限公司