Burner Arrangement Fuel Distribution via Segmented Channels
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Solution Overview
Problem
The existing burner arrangements for gas turbines are heavy and costly due to the need for thick, high-temperature-resistant materials in the fuel support, which also requires labor-intensive machining and complex manufacturing processes.
Innovation Solution
A burner arrangement with fuel nozzles that have a support-side section with extension parts acting as channels for fuel distribution, reducing the need for a thick fuel support and allowing the use of lower-cost materials for distribution channels, which are located away from the hot gas, simplifying machining and reducing weight and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the support is made thick to accommodate fuel passages, then the fuel distribution function is ensured, but the weight and material costs increase
Solution Approach 1:
The fuel distribution system is segmented into two separate components: a thin support structure and independent fuel distribution channels. The channels are positioned away from the hot gas exposure zone, allowing the support to be lightweight while the channels perform the fuel distribution function.
Solution Approach 2:
The fuel distribution channels act as an intermediary element between the fuel source and the nozzles. These channels are positioned in a cooler region away from direct hot gas exposure, mediating the fuel delivery while protecting the main support structure from thermal stress.
2Temperature
If high-temperature-resistant materials are used for the support, then the heat resistance is improved, but the material costs increase
Solution Approach 1:
Different regions of the burner arrangement are assigned different material qualities based on their functional requirements. The support structure uses standard materials since it is not directly exposed to hot gas, while only the nozzle tips in the high-temperature zone use heat-resistant materials.
Solution Approach 2:
The fuel distribution channels are designed as replaceable components made from lower-cost materials. If these channels wear or fail, they can be replaced without replacing the entire expensive heat-resistant support structure.
3Ease of manufacture
If the support is made thick for machining fuel passages, then the fuel passage accommodation is ensured, but the manufacturing complexity increases
Solution Approach 1:
The fuel passage accommodation function is extracted from the support structure and placed into separate, independently manufactured channels. This allows the support to remain thin and simple, while the channels are designed specifically for fuel distribution with optimized flow paths.
Data Source
AI summary
A burner arrangement is provided. The burner arrangement includes a support and at least two fuel nozzles attached to the support in the direction of flow, with each fuel nozzle including a support-side section which includes a contact surface on the support side with which it rests on a supporting surface of the support, with at least two fuel nozzle tips embodied in one piece extending out from the support-side section in the direction of flow and the support-side contact surface including at least two extension parts projecting in the direction of the support, with the extension parts each embodying a channel through which fuel is fed in each case to the fuel nozzle tips through passages which are arranged in the support-side contact surface of the support-side section.