Gas Turbine Insulation Standoff for Fire Prevention
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Solution Overview
Problem
Gas turbine engines face safety hazards due to high temperatures and pressures that can cause flammable fluids to combust, and existing insulation methods are cumbersome and weight-additive, particularly in limited-life aircraft applications.
Innovation Solution
Integrally built insulation standoffs within the gas turbine engine, manufactured using additive techniques like laser powder bed fusion, which are conformal with the stator housing and maintain accessory module temperatures below auto-ignition levels, eliminating the need for external thermal blankets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal blankets are used to insulate the stator housing, then the temperature of flammable fluids is maintained below auto-ignition levels, but the system weight increases significantly
Solution Approach 1:
The patent combines the insulation function with the structural support function by integrating insulation standoffs directly into the stator housing as a single monolithic component. This eliminates the need for separate thermal blankets and their associated fasteners, reducing system weight while maintaining fire prevention capabilities through the inherent insulation properties of the integrated structure
Solution Approach 2:
The patent extracts the insulation function from the external thermal blanket and embeds it within the stator housing structure itself through integrally formed standoffs. This internal integration removes the need for bulky external insulation layers, significantly reducing system weight while preserving the temperature control function
2Temperature
If thermal blankets are applied to the stator housing, then insulation is provided, but the device complexity and installation difficulty increase
Solution Approach 1:
The insulation standoffs are designed as a single monolithic piece that integrates multiple functions: structural support for the stator housing and thermal insulation for protected components. This consolidation eliminates the need for separate insulation materials and multiple fastening operations, dramatically simplifying installation while maintaining effective temperature control
Solution Approach 2:
The stator housing is divided into functional zones using the insulation standoffs, which create distinct thermal environments. The standoffs segment the internal space to provide targeted insulation where needed while maintaining structural integrity, simplifying both design and installation compared to comprehensive external thermal blanket coverage
3Reliability
If traditional insulation methods are used, then thermal protection is achieved, but maintenance requirements increase
Solution Approach 1:
By merging the insulation function into the structurally integral stator housing standoffs, the patent creates a permanent, maintenance-free thermal protection system. The integrated design eliminates separate insulation components that would degrade, loosen, or require replacement, reducing maintenance requirements while sustaining reliable thermal protection throughout the engine lifecycle
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
This solution reduces system weight, simplifies maintenance, and extends the useful life of gas turbine engines by maintaining flammable fluid temperatures below auto-ignition, thereby preventing fires and optimizing performance in limited-life applications.
Implementation Method 1
an insulation standoff (116) attached to an exterior surface of the stator housing (114) of the hot section
Implementation Method 2
manufactured using additive techniques like laser powder bed fusion
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
A hot section (104) of a gas turbine engine (100) includes a stator housing wall (114) and an at least one insulating standoff (116) attached to the stator housing wall (114), extending radially away from the stator housing wall (114). The hot section (104) includes an accessory module (118) attached to an opposite end of the at least one insulating standoff (116) away from the stator housing wall (114).