Dual-Rotation Combustor Jet Nozzle for Faster Secondary Mixing
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Solution Overview
Problem
Existing turbomachines face challenges in increasing the mixing rate of combustion gases and fluids during secondary combustion in the combustor, which affects the efficiency of power generation.
Innovation Solution
A jet nozzle is integrated into the combustor's inner surface to supply fluid into the liner, featuring dual outlet members that rotate the fluid in opposite directions, enhancing the mixing rate of combustion gases and fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional single outlet nozzle is used, then the structure is simple, but the mixing rate of combustion gases and fluid is insufficient
Solution Approach 1:
The nozzle outlet is divided into multiple outlet members (first outlet member and second outlet member) that discharge fluid in different directions. This segmentation allows the fluid to be injected into the combustion chamber at multiple angles, increasing the mixing rate between fluid and combustion gases while maintaining a relatively simple overall nozzle structure.
Solution Approach 2:
The outlet members are configured with asymmetric discharge directions relative to the combustor centerline. The first outlet member discharges at a first angle and the second outlet member discharges at a second angle, creating asymmetric flow patterns that enhance turbulence and mixing efficiency in the combustion chamber.
2Productivity
If fluid is discharged in a single direction, then the nozzle structure is simple, but the combustion efficiency is reduced
Solution Approach 1:
The outlet is segmented into multiple outlet members that discharge fluid in different directions. This multi-directional discharge enhances combustion efficiency by distributing fluid more effectively throughout the combustion chamber, promoting better mixing with combustion gases and enabling more complete secondary combustion.
Solution Approach 2:
The fluid discharge is extended from a single-direction (one-dimensional) approach to multi-directional (three-dimensional) discharge through the angled outlet members. This dimensional expansion allows fluid to interact with combustion gases across multiple spatial dimensions, significantly improving combustion efficiency.
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 dual-rotation jet nozzle design improves the mixing efficiency of combustion gases and fluids, leading to increased combustion efficiency and power generation performance.
Implementation Method 1
A jet nozzle is integrated into the combustor's inner surface to supply fluid into the liner, featuring dual outlet members that rotate the fluid in opposite directions, enhancing the mixing rate of combustion gases and fluids.
Data Source
Figure 1~2
Figure 3~5
AI summary
Jet nozzle (1500) is formed on an inner surface of a combustor (1000) to supply fluid into an interior of a liner (1200) of the combustor in a direction intersecting with a progress direction of combustion gases primarily combusted in a combustion chamber (1210) in the interior of the liner. The jet nozzle includes a fluid inlet (1510), through which fluid is externally introduced, and a fluid outlet (1520) including a first fluid outlet member (1521), through which a portion of the fluid introduced through the fluid inlet is discharged so as to be rotated in one direction, and a second fluid outlet member (1522), through which the rest of the fluid is discharged so as to be rotated in a direction different from the rotation direction of the fluid discharged from the first fluid outlet member.