Burner Partition Member Oxidant Flow Control
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Solution Overview
Problem
Existing burner devices for diesel engines may experience decreased ignitability and combustion instability due to insufficient oxidant supply in the combustion region, leading to unstable production of high-temperature gas.
Innovation Solution
A burner device with a partition member featuring a center plate and side plate that guides oxidant flow into specific regions, ensuring sufficient oxidant supply and adjusting flow speed to stabilize combustion, including a protrusion portion to direct oxidant into the take-in passage and through-holes for ventilation between regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of oxidant supplied to the combustion region is increased, then the stability of combustion state is improved, but the device complexity increases due to the need for partition members and flow control structures
Solution Approach 1:
The combustion chamber is segmented into distinct regions (ignition region and flame retaining region) using partition members, allowing separate control of combustion processes in different zones. This segmentation enables stable combustion by maintaining proper oxidant distribution across functional zones without requiring complex external control systems.
Solution Approach 2:
Partition members with through-holes act as intermediaries to control oxidant flow between regions. These structures mediate the distribution of oxidant from the combustion region to the flame retaining region, ensuring stable combustion while using simple geometric forms rather than complex active control mechanisms.
2Productivity
If the flow speed of mixture gas is increased to improve combustion efficiency, then the productivity is improved, but the combustion stability deteriorates due to insufficient oxidant supply and mixture gas dilution
Solution Approach 1:
The partition members are designed with through-holes that pre-position oxidant supply paths before combustion occurs. This preliminary structural arrangement ensures that oxidant is automatically supplied to appropriate regions at the correct rates, maintaining combustion stability even at high flow speeds without requiring active flow control during operation.
Solution Approach 2:
Different regions of the combustion chamber are given different local qualities through the partition structure - the ignition region receives fresh oxidant for efficient combustion, while the flame retaining region receives controlled oxidant through through-holes to maintain flame stability. This local differentiation allows high overall combustion efficiency while maintaining local stability in the flame retaining region.
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 solution improves ignitability in the ignition region and stability of combustion in the flame retaining region, allowing for stable production of high-temperature gas by ensuring a sufficient oxidant supply and optimal flow speed.
Implementation Method 1
The mixture gas is heated by an ignition device to not less than an ignition temperature. As a result, the mixture gas is burnt.
Implementation Method 2
A mixture gas of an exhaust gas and a fuel is combusted to produce a high-temperature gas.
Data Source
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AI summary
A burner device (S1) that burns a mixture gas of an oxidant and a fuel includes a partition member (8) which air- permeably partitions an ignition region (R2) for igniting the mixture gas (Y) and a flame retaining region (R3) for maintaining the combustion of the mixture gas (Y), and which also adjusts the flow speed of the mixture gas (Y) supplied from the ignition region (R2) to the flame retaining region (R3), in which the partition member (8) includes a protrusion portion (8a1) that protrudes into an oxidant flow passage (1) and that stops a part of the oxidant flowing through the oxidant flow passage (1) to guide it into a take-in passage region (R1). According to the burner device (S1), with a sufficient amount of oxidant being supplied to a combustion region, it is possible to stabilize a combustion state of the mixture gas and, moreover, to stably produce a high-temperature gas.