Turbine Engine Bleed Air Drain Assembly for Fire-Zone Condensation
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Solution Overview
Problem
Turbine engines face challenges in effectively draining condensation from bleed air conduits within the fire zone without exposing engine controllers to high temperatures or risking ignition, which can lead to system failures.
Innovation Solution
A drain assembly is integrated into the bleed air conduit within the fire zone, featuring a junction fitting and weep hole to divert condensation externally, ensuring the engine controller, positioned in the flammable fluid leakage zone, remains safe and operational.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drain assembly is integrated into the bleed air conduit within the fire zone, then condensation drainage is improved, but the risk of ignition and exposure to high temperatures increases
Solution Approach 1:
The drain assembly is extracted from the fire zone and positioned in the FFLZ (Flammable Fluid Leakage Zone) instead, separating the drainage function from the high-temperature environment while maintaining effective condensation removal through the bleed air conduit
Solution Approach 2:
The bleed air conduit serves as an intermediary carrier that transports both the bleed air and the condensed water from the fire zone to the drain assembly located in the FFLZ, enabling safe separation of the drainage function from the high-temperature zone
2Reliability
If the engine controller is positioned in the flammable fluid leakage zone, then operational safety is improved, but exposure to potential flammable fluid leakage increases
Solution Approach 1:
Condensation is drained from the bleed air conduit before it can enter the FFLZ where the engine controller is located. The drain assembly is positioned upstream of the controller, preemptively removing potential water accumulation that could contribute to ignition risks or electrical damage
3Measurement precision
If bleed air is drawn from upstream sections to measure pressure, velocity, and temperature, then measurement accuracy is improved, but the complexity of the bleed air system increases
Solution Approach 1:
The bleed air conduit system serves multiple functions simultaneously: it transports bleed air to downstream sections for cooling and conditioning, and provides measurement points for pressure, velocity, and temperature sensing. The integrated drain assembly also serves dual purposes by draining condensation while maintaining system pressure
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 effectively drains condensation from the bleed air conduits, maintaining the integrity of the engine controller and enhancing the accuracy of pressure, temperature, and velocity measurements, thereby improving the turbine engine's operational efficiency and safety.
Implementation Method 1
A drain assembly is integrated into the bleed air conduit within the fire zone, featuring a junction fitting and weep hole to divert condensation externally
Data Source
AI summary
A turbine engine has an engine core, a fan section, a bleed air conduit, and a drain assembly. The engine core has a compressor section, combustor section, and turbine section in serial flow arrangement and defining a stator, rotor, and a fire zone. The fan section is rotationally coupled to the rotor. The bleed air conduit is fluidly coupled to at least one of the fan section or the compressor section and having a gravitational low point within the fire zone. The drain assembly is provided along the bleed air conduit.