Burner Distribution Diaphragm for Uniform Fuel Gas Flow
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Solution Overview
Problem
Existing gas burners experience local overheating and flame instability due to non-uniform fuel gas distribution over the diffuser, leading to thermoacoustic noise and inefficient combustion.
Innovation Solution
A burner design featuring a distribution diaphragm with a central passage section and peripheral passage sections that form a single, tentacular-shaped opening, reducing concentrated flows and promoting a combination of laminar and turbulent gas flows for uniform distribution over the diffuser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a multi-hole distribution diaphragm is used, then the fuel mixture is distributed over the burner, but concentrated areas of increased crossing are formed on the diffuser separated by reduced crossing areas, leading to non-uniform flow distribution
Solution Approach 1:
The distribution diaphragm is divided into multiple functional zones: a central zone with a first passage opening and a peripheral zone with a second passage opening. This segmentation allows different regions of the diaphragm to control different aspects of flow distribution, creating a more uniform velocity profile across the diffuser by preventing concentrated crossing areas.
Solution Approach 2:
Different regions of the distribution diaphragm are assigned different characteristics: the central region has a first passage opening with specific dimensions for controlling central flow, while the peripheral region has a second passage opening for controlling outer flow. This local differentiation ensures that each region contributes appropriately to achieving uniform overall flow distribution.
2Reliability
If flow elements or noise-control horns are added to the burner, then local overheating and flame instability are addressed, but the device complexity increases
Solution Approach 1:
The distribution diaphragm performs multiple functions simultaneously: it distributes the fuel mixture across the burner, controls flow velocity distribution to prevent concentrated crossing areas, and stabilizes combustion. By integrating these functions into a single component rather than adding separate flow elements or noise-control horns, the solution improves reliability without significantly increasing device complexity.
3Productivity
If concentrated gas flows are formed in the burner, then fuel mixture is delivered to specific areas, but strong vorticity is created that hinders fuel mixture arrival at intermediate regions, leaving those areas underutilized for combustion
Solution Approach 1:
The passage openings are segmented into central and peripheral zones with different characteristics. The central passage opening delivers fuel to the central region, while the peripheral passage opening delivers fuel to outer regions. This segmentation prevents the formation of strong vortices between detached flows and ensures uniform fuel distribution across all diffuser areas, maximizing combustion efficiency.
Solution Approach 2:
The distribution diaphragm acts as an intermediary element between the fuel mixture inlet and the diffuser. By carefully designing the passage openings in the diaphragm, it mediates the flow to create a uniform velocity distribution that prevents vorticity formation and ensures all regions of the diffuser are effectively utilized for combustion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances flame stability, reduces thermoacoustic noise, and minimizes the risk of local overheating by achieving a more uniform fuel gas distribution and efficient combustion.
Implementation Method 1
alternate areas with a laminar fuel gas flow with areas with a turbulent fuel gas flow
Implementation Method 2
alternate areas with a laminar fuel gas flow with areas with a turbulent fuel gas flow
Data Source
AI summary
A burner comprises a tubular diffuser wall and an inlet passage of a gas mixture in the diffuser wall, as well as a distribution diaphragm having a distribution opening which forms a central passage section and a plurality of peripheral passage sections, in the shape of rays or branches, extending from the central passage section towards the diffuser wall, and in which the peripheral passage sections and the central passage section are connected together to form a single hole.