Multi-Jet Fuel Nozzle Layout for Uniform Combustion Mixing
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Solution Overview
Problem
Existing fuel injector nozzles for engines lack optimal fuel distribution and penetration into the combustion chamber, leading to inefficiencies and potential issues like flashback and flame holding.
Innovation Solution
A fuel nozzle design with multiple fuel passages arranged circumferentially, featuring angled trajectories and outlets to promote deeper or shallower fuel penetration into the combustion chamber, ensuring uniform fuel distribution and collision for enhanced mixing with compressed air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fuel is injected through a single outlet location, then the structure is simple, but fuel penetration depth is insufficient and distribution is non-uniform
Solution Approach 1:
The fuel nozzle is segmented into multiple independent fuel passages (first fuel passage, second fuel passage, etc.) with separate outlets. Each passage can be independently designed and positioned to achieve uniform fuel distribution across the combustion chamber, resolving the contradiction between simple structure and uniform distribution.
Solution Approach 2:
The fuel injection system transitions from a single-point outlet to multiple outlets arranged in different spatial dimensions (circumferential arrangement around the axis). This dimensional expansion enables deeper penetration and more uniform distribution simultaneously by utilizing both radial and axial spatial coordinates.
2Length of moving object
If fuel outlet is positioned at the distal end, then the structure is simple, but fuel penetration depth is insufficient
Solution Approach 1:
The fuel passage trajectories are designed with asymmetric angular offsets relative to the axial direction. The first fuel passage has a first angular offset and the second fuel passage has a second angular offset, creating asymmetric injection angles that optimize penetration depth while maintaining structural feasibility.
Solution Approach 2:
The fuel passages are designed with dynamic trajectories that change direction from the outlet location to the target location. This dynamic path design allows the fuel jet to penetrate deeper into the combustion chamber by utilizing angular offsets, transforming the simple straight-line outlet design into a multi-directional injection system.
3Reliability
If multiple fuel passages are used, then fuel distribution is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple fuel passages are designed with universal geometric patterns (circumferential arrangement around the axis) that can be manufactured using standardized processes. The consistent angular offset design and circumferential symmetry allow the same manufacturing template to be applied to all passages, reducing overall manufacturing complexity despite the multi-passaging design.
Data Source
AI summary
An apparatus is provided for an engine. This apparatus includes a fuel nozzle extending axially along an axis to a distal end of the fuel nozzle. The fuel nozzle includes a plurality of fuel passages arranged circumferentially around the axis. The fuel passages includes a first fuel passage and a second fuel passage. The first fuel passage includes a first passage outlet axially aligned with an outlet location along the axis. The first fuel passage extends longitudinally within the fuel nozzle to the first passage outlet. A trajectory of the first fuel passage at the first passage outlet points to a target location along the axis that is axially spaced from the outlet location. The second fuel passage includes a second passage outlet. The second fuel passage extends longitudinally within the fuel nozzle to the second passage outlet. A trajectory of the second fuel passage at the second passage outlet points to the target location.