Gas turbine engine thermal management system

A method of designing a thermal management system for a gas turbine engine, comprising:

• configuring a heat exchanger;
• configuring a valve for controlling an amount of a first fluid that is communicated through said heat exchanger;
• configuring a first sensor that is operable for sensing a first characteristic of a second fluid that is communicated through said heat exchanger to exchange heat with said first fluid;
• and
• configuring a second sensor that is operable for sensing a second characteristic of said second fluid, wherein a positioning of said valve is based on at least one of said first characteristic and said second characteristic.

A thermal management system comprising:

• a first fluid circuit and a second fluid circuit configured for managing heat generated in at least a portion of a gas turbine engine;
• a first heat exchanger incorporated into each of said first fluid circuit and said second fluid circuit;
• a second heat exchanger incorporated into said first fluid circuit;
• a valve to control an amount of a first fluid that is communicated to said first heat exchanger and said second heat exchanger;
• and
• a controller configured to control a positioning of said valve, wherein said amount of said first fluid communicated to said first heat exchanger is based on a first characteristic of a second fluid and said amount of said first fluid communicated to said second heat exchanger is based on a second characteristic of said second fluid.