EXPERIMENTAL STUDY ON THERMAL EFFICIENCY OF A MULTI-JET ANTI-ICING SYSTEM WITH PICCOLO TUBE

摘要

An experimental study was conducted to investigate the jet impingement thermal efficiency of a typical model for a multi-jet anti-icing system under different experimental conditions such as air mass flow rate at the jet exit, piccolo tube position and circumferential angle of jet holes. The experimental results showed that jet mass flow rate, velocity at the jet exits (whether choking conditions were established at the jet exits or not) and piccolo tube-to-leading edge distance within the cavity had significant influence on thermal efficiency of the anti-icing system. The heat flux on the external surface of leading edge, diameter of jet holes and circumferential angle of jet holes had a measurable but small effect on thermal efficiency of the anti-icing system.