Aircraft Turbine Engine Fuel Heating and Separation for Contrail Mitigation
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Solution Overview
Problem
Turbine engines in aircraft produce combustion gases that can form contrails due to the condensation of water vapor, which is promoted by particles in the exhaust gases, leading to persistent contrails that can affect atmospheric conditions.
Innovation Solution
A contrail mitigation system that generates fuel precipitates, such as coke particles, by heating the hydrocarbon fuel to specific temperatures and then separates them before combustion to reduce particulate matter in the exhaust gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If particles are present in exhaust gases, then water vapor condensation is promoted and contrails form, but the harmful environmental effect increases
Solution Approach 1:
The patent extracts and removes particulate matter from the exhaust gas stream using a particulate removal system, which may include cyclonic separators, electrostatic precipitators, or filters. This extraction of harmful particles directly reduces the nucleation sites available for water vapor condensation, thereby mitigatingcontrail formation while maintaining the functional integrity of the turbine engine exhaust system
Solution Approach 2:
The patent converts the harmful effect of particles promoting condensation into a beneficial control mechanism by using particle detection systems to trigger contrail mitigation modes. The presence of particles, which normally causes unwanted contrails, is detected and used as a signal to activate emission control measures, thereby transforming the harmful condition into a control input for reducing environmental impact
2Object-affected harmful factors
If a contrail mitigation system is added to the turbine engine, then contrail formation is reduced, but the device complexity increases
Solution Approach 1:
The patent integrates the contrail mitigation system into existing turbine engine components, allowing them to serve multiple functions. For example, the exhaust system components may simultaneously handle normal exhaust discharge and particulate removal, while sensor systems serve both monitoring and control functions. This multi-functionality approach reduces the need for entirely separate dedicated systems, thereby limiting the increase in overall device complexity
Solution Approach 2:
The patent implements feedback control through sensor systems that continuously monitor exhaust gas conditions, including particle concentration, temperature, and humidity. These sensors provide real-time data to control systems that adjust emission control measures accordingly, enabling the contrail mitigation system to operate efficiently based on actual conditions rather than requiring complex continuous operation of all components
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
Reduces the formation of contrails by removing particles that act as nucleation sites for water vapor condensation, thereby minimizing contrail formation and its environmental impact.
Implementation Method 1
heating the hydrocarbon fuel to specific temperatures and then separates them before combustion to reduce particulate matter in the exhaust gases
Implementation Method 2
separates them before combustion to reduce particulate matter in the exhaust gases
Implementation Method 3
combustion gases for driving a turbine in the turbo-engine of the turbine engine
Implementation Method 4
contrails due to the condensation of water vapor
Data Source
AI summary
A turbine engine for an aircraft includes a fuel delivery assembly for a hydrocarbon fuel to flow therethrough, a combustor combusting the fuel to generate combustion gases, and a core air exhaust nozzle exhausting the combustion gases from the turbine engine. The turbine engine also includes a contrail mitigation system having a heater and a fuel precipitate separator. The heater is selectively operable to heat the hydrocarbon fuel and to generate fuel precipitates in the hydrocarbon fuel, and the fuel precipitate separator separates the fuel precipitates generated by the heater from the fuel. A controller is coupled to the heater to operate the heater to heat the hydrocarbon fuel and to generate fuel precipitates in the hydrocarbon fuel in response to a contrail mitigation input.