Swirl Vane Liquid Fuel Injector Airflow Optimization
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Solution Overview
Problem
Conventional air-blast type liquid fuel injectors with helical vanes require a high air flow rate and generate significant pressure loss to achieve effective atomization of liquid fuel, leading to suboptimal atomization efficiency.
Innovation Solution
The design incorporates inner and outer swirl vanes with action surfaces inclined relative to the radial direction, optimizing the velocity distribution to enhance atomization while minimizing air flow rate and pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional helical vanes are used in air passages, then liquid fuel atomization is achieved, but high air flow rate and significant pressure loss are required
Solution Approach 1:
The patent changes the geometric parameters of the swirl vanes by introducing an inclination angle relative to the radial direction. This parameter modification optimizes the velocity distribution of airflow, enabling effective atomization with reduced air flow rate and pressure loss compared to conventional radial vanes
Solution Approach 2:
The inclined swirl vanes dynamically adjust the airflow velocity distribution through their angled geometry. This creates an optimized flow pattern that enhances atomization efficiency while reducing the energy required to achieve the same atomization quality
2Manufacturing precision
If conventional helical vanes are used in air passages, then liquid fuel atomization is achieved, but high air flow rate is required
Solution Approach 1:
By modifying the vane inclination angle parameter, the system achieves superior atomization quality at lower air flow rates. The optimized geometry enhances the interaction between airflow and liquid fuel film, improving atomization efficiency without requiring high volumetric flow
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 achieves high-level liquid fuel atomization with reduced air flow rate and pressure loss, improving the efficiency of the atomization process.
Implementation Method 1
atomizing liquid fuel injected as a film by use of shearing force caused by a difference in velocity from airflow flowing adjacent to this fuel
Implementation Method 2
The design incorporates inner and outer swirl vanes with action surfaces inclined relative to the radial direction, optimizing the velocity distribution to enhance atomization
Data Source
AI summary
A liquid fuel injector includes a cylindrical center body including a center axis, an annular shroud concentrically disposed outside the center body, an annular fuel injection body disposed between and concentrically with the center body and the shroud, and including a fuel passage formed therein, a plurality of inner swirl vanes that are arranged in an equal cycle in an inner air passage between the center body and the fuel injection body, and are provided with an inner swirl vane action surface on an upstream side, a plurality of outer swirl vanes that are arranged in an equal cycle in an outer air passage between the fuel injection body and the shroud, and an outer swirl vane action surface on the upstream side.