What adjustment can be made to allow for higher gas temperatures in the turbine section of some engines?

Routing cooling air through the turbine inlet guide vanes (IGVs) and rotor blades is a critical method for managing higher gas temperatures in the turbine section. This adjustment is essential because it helps maintain the structural integrity and efficiency of the turbine. By directing cooling air through these components, the engine can dissipate heat effectively, thereby protecting the materials from thermal fatigue and potential failure due to excessive temperatures.

Additionally, this cooling strategy helps in maintaining optimal operating conditions, allowing the engine to produce the necessary thrust without compromising safety or performance. The cooling air lowers the temperature of the turbine components directly, which is especially important in high-performance applications where temperatures can rise significantly during operation.

Other adjustments, such as increasing fuel flow or using thicker turbine blades, do not effectively address the issue of managing gas temperatures and could potentially lead to other problems or inefficiencies in engine performance.