Secondary gas and air flows include all non-main gas path flows such as compressor bleed flows, leakage flows, turbine cooling flows etc. Compressor bleed flows may be used as customer bleed (exiting the engine), anti-icing bleed (sometimes re-entering the engine) or turbine cooling bleed (re-entering the engine). Secondary air flow rates can be controlled by other components such as bleed control components.
Secondary air flows are identified with numbers (bleed flow numbers, turbine cooling flow numbers) and are not visible in the model window.
Secondary air and gas flows
