Fuel Supply Device Flow Distribution for Uniform Atomization
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Solution Overview
Problem
Existing fuel supply devices for internal combustion engines, such as gas turbine engines, face challenges in achieving uniform flow of liquid fuel due to skewing issues, even with the use of swirlers, which complicates the mixing process with air.
Innovation Solution
A fuel supply device comprising an outer and inner tubular member with a flow distribution portion featuring multiple distribution wall portions arranged to split and distribute the liquid fuel flow uniformly, followed by a swirler for turning the fuel, ensuring even atomization during mixing with air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a swirler is used to rotate liquid fuel, then the fuel flow should be equalized, but the liquid fuel flows skewed to one side and uniform flow is difficult to achieve
Solution Approach 1:
The flow distribution portion is segmented into multiple distribution wall portions (first, second, and third distribution wall portions) with multiple individual wall portions in each segment. This segmentation allows the fuel flow to be divided and redistributed systematically, correcting the skewing problem that a single swirler cannot resolve while maintaining uniform flow distribution.
Solution Approach 2:
The invention transitions from a single rotational dimension (swirler) to a multi-dimensional flow distribution system using multiple distribution wall portions arranged at different positions and angles. This multi-dimensional approach enables comprehensive control of fuel flow in radial and axial directions, achieving uniform distribution without relying solely on rotational motion.
2Manufacturing precision
If multiple distribution wall portions with individual wall portions are arranged to distribute fuel flow, then uniform flow distribution is achieved, but the structure becomes more complex
Solution Approach 1:
The flow distribution portion is divided into multiple distribution wall portions (first, second, and third distribution wall portions) with multiple individual wall portions in each segment. This segmentation allows the fuel flow to be divided and redistributed systematically, correcting the skewing problem that a single swirler cannot resolve while maintaining uniform flow distribution.
Solution Approach 2:
Multiple distribution wall portions are nested within the same flow distribution portion structure, with each containing multiple individual wall portions. This nested arrangement allows complex flow distribution functionality to be achieved within a compact structure, reducing overall device complexity while maintaining manufacturing precision.
3Productivity
If liquid fuel is atomized by creating a mixture with air, then combustion efficiency improves, but uniform mixing is difficult when fuel flow is skewed
Solution Approach 1:
The flow distribution portion performs preliminary action by distributing and equalizing the liquid fuel flow before it enters the mixing and atomization stage. By pre-correcting the flow skewing and ensuring uniform fuel distribution, the subsequent mixing with air achieves better uniformity and combustion efficiency.
Solution Approach 2:
The flow distribution portion is segmented into multiple distribution wall portions (first, second, and third distribution wall portions) with multiple individual wall portions in each segment. This segmentation allows the fuel flow to be divided and redistributed systematically, correcting the skewing problem that a single swirler cannot resolve while maintaining uniform flow distribution.
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
The device achieves a uniform flow of liquid fuel, enhancing the atomization performance during the mixing process with air, thereby improving fuel combustion efficiency.
Implementation Method 1
a flow distribution portion arranged between the inner surface of the outer tubular member and an outer surface of the inner tubular member to distribute the flow of liquid fuel flowing in the liquid fuel path
Implementation Method 2
a swirler arranged between an inner surface of the outer tubular member and an outer surface of the inner tubular member and at a downstream side of the flow distribution portion based on a flow direction of the liquid fuel
Implementation Method 3
when liquid fuel is atomized due to a difference in the relative velocity between the liquid fuel and the air
Data Source
AI summary
A fuel supply device includes: an outer tubular member; an inner tubular member inside the outer tubular member; and a flow distribution portion on an inner surface of the outer tubular member or an outer surface of the inner tubular member, wherein the flow distribution portion includes first and second distribution wall portions arranged apart from one another in an axial direction of the inner tubular member, the first distribution wall portion includes first individual wall portions spaced apart from one another along a first circumference of the inner tubular member, the second distribution wall portion includes second individual wall portions spaced apart from one another along a second circumference of the inner tubular member, at least some of the first individual wall portions are arranged to face spaces between at least some of the second individual wall portions, respectively, in the axial direction of the inner tubular member.