Patent ID: 6957569
Filing Date: 2005-10-25
Classification: G01M

Abstract:
1. A method of detecting the presence of oil in turbine engine bleed air, comprising the steps of: sampling bleed air from the engine; collecting the sampled bleed air; sampling engine inlet air for the engine; measuring the mass concentration and size distribution of aerosol particles in the sampled engine inlet air with an aerosol sampler/size classifier; measuring the mass concentration and size distribution of aerosol particles in the collected sampled bleed air with the aerosol sampler/size classifier; comparing the measured mass concentration and size distribution of aerosol particles in the sampled engine inlet air with the measured mass concentration and size distribution of aerosol particles in the collected sampled bleed air; and determining that oil is present in the bleed air of the engine when the measured mass concentration and size distribution of aerosol particles in the collected sampled bleed air exceeds the measured mass concentration and size distribution of aerosol particles in the sampled engine inlet air by a predetermined amount.