Turbine Burner Head Plate Impingement Cooling Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing burners for gas turbines face challenges in maintaining stable, controlled, and low-emission combustion over a large operating range, with central flame holders experiencing high thermal loads and short service life due to lack of cooling, leading to frequent replacements and increased maintenance costs.
Innovation Solution
A burner design that incorporates a housing with an air collecting chamber, combustion antechamber, and combustion chamber, featuring a baffle plate with through-passages for efficient impingement cooling of the burner head plate, where cooling air is supplied to the rear surface without disrupting the combustion process, and is directed outwards through gaps or openings to minimize influence on the combustion zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If flame holders are used to stabilize the combustion zone, then combustion stability is improved, but thermal load on components increases and service life decreases
Solution Approach 1:
The burner head plate is divided into functionally distinct zones: a first region with cooling air supply for thermal management and a second region without cooling for optimal combustion stability. This segmentation allows each zone to perform its specific function effectively, resolving the contradiction between cooling needs and combustion stability.
Solution Approach 2:
Different regions of the burner head plate are assigned different thermal management characteristics. The first region receives cooling air to reduce thermal load, while the second region remains uncooled to maintain combustion stability. This local differentiation allows the system to simultaneously address both thermal management and combustion stability requirements.
2Temperature
If cooling air is supplied to the burner head plate, then thermal wear is reduced, but combustion process may be disrupted
Solution Approach 1:
The burner head plate is segmented into a first region with cooling air supply and a second region without cooling. This spatial segmentation ensures that cooling air is directed only to areas where thermal management is critical, while leaving the combustion-critical regions uncooled, thus preventing disruption to the combustion process.
Solution Approach 2:
The cooling air supply is localized to specific regions of the burner head plate based on thermal load requirements. By providing cooling only where necessary (first region) and leaving other areas (second region) uncooled, the system achieves thermal wear reduction without adversely affecting combustion stability.
3Ease of operation
If flame holders are used for combustion stabilization, then combustion control is improved, but maintenance frequency increases due to short service life
Solution Approach 1:
The burner head plate is divided into cooled and uncooled regions, with the cooled first region extending further into the combustion chamber. This segmentation allows the burner to maintain effective combustion control while reducing thermal load on critical components, thereby extending service life and reducing maintenance frequency.
Solution Approach 2:
Cooling air is supplied in advance to the first region of the burner head plate before thermal damage can occur. This preliminary cooling action prevents excessive thermal accumulation, extending the service life of the burner components and reducing the frequency of maintenance interventions.
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 cooling solution significantly extends the service life of the burner head plate by reducing thermal wear while maintaining combustion stability, with the cooling air being introduced in a way that minimizes disruption to the combustion process, thus reducing maintenance costs and downtime.
Implementation Method 1
efficient impingement cooling is achieved for the burner head plate
Implementation Method 2
the rear surface of the burner head plate is subjected to cooling air
Data Source
Figure 1
Figure 2
AI summary
The burner has a housing (10), in which an air collection chamber (13), a combustion antechamber (16) and a combustion chamber are formed. A burner-head plate (40) is arranged in the housing so that the burner-head plate separates the combustion antechamber from the combustion chamber. A bulging plate (30) is arranged in the combustion antechamber and has multiple through passages (31).