Angled Mixing Tube Layout for Cooler Combustor Nozzle Outlets
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Solution Overview
Problem
Conventional tube-type fuel nozzles in hydrogen combustors experience overheating due to heat concentration in empty spaces between nozzles, necessitating additional cooling technologies.
Innovation Solution
The combustor nozzle design includes mixing tubes with angled outlets positioned to correspond to the fuel supply part, eliminating empty spaces and utilizing self-cooling effects from low-temperature fluid flow to maintain uniform temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional tube-type fuel nozzles are disposed parallel to each other with separate fuel supplying structures, then each nozzle can be supplied with fuel independently, but empty spaces are generated between nozzles causing heat concentration and overheating at outlet surfaces
Solution Approach 1:
The patent combines multiple fuel supply functions into a single integrated fuel supply structure that serves multiple mixing tubes simultaneously. The fuel supply part includes a common fuel supply passage that branches to supply fuel to multiple mixing tubes, eliminating the need for separate fuel supplying structures for each nozzle while preventing empty spaces between nozzles.
Solution Approach 2:
The fuel supply part is designed as a multi-functional component that performs both fuel distribution to multiple mixing tubes and structural support function. The common fuel supply passage serves multiple nozzles universally, eliminating the need for individual fuel supply structures for each nozzle while maintaining independent fuel supply capability.
2Temperature
If mixing tubes are disposed with angles so that outlets correspond to the fuel supply part, then empty spaces between nozzles are eliminated, but the structural complexity of the mixing tube arrangement increases
Solution Approach 1:
The mixing tubes are disposed at different angles relative to the fuel supply part, creating an asymmetric arrangement where tube outlets correspond to the fuel supply region. This asymmetric configuration eliminates empty spaces between nozzles and ensures uniform temperature distribution, while the fuel supply part's centralized design keeps the overall structure manageable.
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
Prevents overheating by eliminating gaps between mixing tubes and ensures uniform temperature distribution across outlets, enhancing the nozzle's operational stability and efficiency.
Implementation Method 1
a plurality of mixing tubes configured to spray a mixture fluid in which air and fuel are mixed with each other
Implementation Method 2
utilizing self-cooling effects from low-temperature fluid flow to maintain uniform temperatures
Implementation Method 3
a mixture of the compressed air and the fuel is combusted and then a generated combustion gas is supplied to a turbine
Data Source
AI summary
Proposed are a combustor nozzle, and a combustor and a gas turbine including the combuster nozzle. The combustor nozzle includes a plurality of mixing tubes spraying a mixture fluid of air and fuel into spray holes, a rear plate supporting the mixing tubes at each rear end of the mixing tubes, and a fuel supply part mounted in the rear plate and configured to supply fuel. Each outlet of a portion of the mixing tubes is formed at a position corresponding to the fuel supply part. Therefore, since inclination angles are provided in the mixing tubes adjacent to the fuel supply part in the combustor nozzle of the gas turbine so that each outlet of the mixing tubes is evenly disposed, an empty space between each of the mixing tubes is not formed, so that overheating of each outlet of the mixing tubes due to heat concentration may be prevented.