Heat Management in Advanced Aircraft Gas Turbine Engines

Abstract

This paper summarizes current and projected heat management techniques within aircraft gas turbines. Each of the primary heat sources is individually considered, including the thermodynamic cycle sources of fuel combustion and air compression, and the parasitic sources of friction, oil churning and rotor windage. For each source, the problem is presented, and solutions - both present and future - are offered. Heat management within low spool reduction gearing is also discussed because of the high probability of an advanced high speed turboprop and geared high bypass ratio turbofan propulsion system in the future.